Temat: maize yield - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Impact of rainfall variability on maize yield in the KwaZulu-Natal, North-West and Free State provinces of South Africa (1987–2017)
Autorzy:: Mapfumo, Phrasia
Chagwiza, Clarietta
Antwi, Michael
Powiązania:: https://bibliotekanauki.pl/articles/1891733.pdf
Data publikacji:: 2020-12-28
Wydawca:: Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:: climate change
rainfall
mean maize yield
correlation
ANOVA
South Africa
Opis:: Climate change has increased temperature, caused drought in places like North West Province, and reduced crop yield. This study investigated the climate change impact (rainfall) on maize yield (1987 -2017). The objectives were to determine the climate change impact on maize yield for Kwazulu-Natal, North West, and Free State Provinces of South Africa, assess the difference in climate change impact on maize yield between the three provinces. Rainfall and maize data were collected from WeatherSA and DAFF, respectively. A Pearson Correlation Analysis revealed a weak negative correlation between rainfall and maize for KwaZulu-Natal and Free State Provinces. However, for North West Province there was a weak positive correlation between maize yield and rainfall. Rainfall determines yield, if excessive, it becomes detrimental to crop yield. Climate change affected negatively on maize yield, rainfall above maize requirement was not beneficial to crop yield and drought reduced yield too. ANOVA results revealed that the group mean yield between the Provinces was different, with KwaZulu-Natal having the highest mean yield. The climate change impact on maize varied between provinces, KwaZulu-Natal Province was least affected, however, North West Province was the most negatively impacted with drought events leading to reduced maize yield.
Źródło:: Journal of Agribusiness and Rural Development; 2020, 58, 4; 359-367
1899-5241
Pojawia się w:: Journal of Agribusiness and Rural Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Social capital networks, microcredit and poverty status of rural households in Nigeria
Autorzy:: Ogunleye, Ayodeji Sunday
Powiązania:: https://bibliotekanauki.pl/articles/1891740.pdf
Data publikacji:: 2020-12-29
Wydawca:: Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:: climate change
rainfall
mean maize yield
correlation
ANOVA
South Africa
Opis:: This study examined how social capital networks contribute to rural households’ poverty status in Southwestern Nigeria. A multistage sampling procedure was used to select a total of 300 households for this study. A structured questionnaire was used to obtain information and data were analyzed using descriptive statistics, Foster, Greer and Thorbecke (FGT) poverty measure and Two-Stage Least Square model (2SLS). Results showed that poverty incidence, depth and severity were 60%, 46.70% and 20.10% respectively among the sampled households. The results indicated that forms of social capital networks in the study area include cooperative societies, family and friends, farmers’, professional career, religious, and microfinance groups. The results further showed that 66.00% of the households in the study area sourced microcredit from cooperative societies. The 2SLS estimate showed that the coefficient of the aggregate social capital index (β =730.83, p < 0.05) also showed a positive, significant relationship with household per capital expenditure. The result indicated that a unit increase in social capital network index of the household would increase household per capita expenditure in the study area by N730.83. The study concluded that membership of social capital networks positive influence households’ access to access to microcredit and poverty reduction.
Źródło:: Journal of Agribusiness and Rural Development; 2020, 58, 4; 369-378
1899-5241
Pojawia się w:: Journal of Agribusiness and Rural Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Potassium content in maize and soil fertilized with organic materials
Zawartosc potasu w kukurydzy i glebach nawozonych materialami organicznymi
Autorzy:: Gondek, K
Kopec, M.
Powiązania:: https://bibliotekanauki.pl/articles/14524.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: maize
soil
fertilization
organic material
potassium content
sewage sludge
mineral potassium fertilization
maize yield
grain size distribution
Opis:: Since potassium is essential for plant nutrition, should this element be deficient in sewage sludge used for plant fertilization supplementary mineral potassium fertilization is necessary. The aim of the present study has been to evaluate the effect of fertilization with organic materials on maize yield, its potassium concentrations and the content of bioavailable forms of potassium in soil of different grain size distribution. The impact of fertilization on potassium concentrations in maize was examined in a 3-year, two-factor pot experiment (the factors were soil and fertilization). The grain size distribution of the test soil material was weakly loamy sand (psg), sandy silt loam (gpp) and medium silt loam (goep). Sewage sludge originated from two different municipal mechanical and biological sewage treatment plants. Mixtures of sewage sludge with peat were prepared at a gravimetric ratio 1:1 converted to material dry matter. For chemical analyses the plant material was mineralized in a muffle furnace (at 450oC for 5 hrs) and the remains were dissolved in diluted nitric acid. Bioavailable potassium was determined with Egner-Riehm method in the soil material, which was dried and sifted through a 1mm mesh sieve. Potassium was determined by flame photometry in solutions of the plant material and soil extracts. Fertilization with sewage sludge and mixtures with peat had a more positive effect on maize yield than fertilization with mineral salts. In comparison with organic materials supplied to the soil, mineral salt treatment significantly increased potassium content in maize biomass. Mineral supplementation of potassium introduced with organic materials and its balancing did not increase soil abundance in bioavailable potassium in comparison with the initial abundance, although a diversified soil response to the applied fertilization was observed.
Biorąc pod uwagę niezbędność potasu w żywieniu roślin, deficytowa zawartość tego składnika w osadach ściekowych wykorzystywanych do nawożenia roślin wymaga jego uzupełnienia w formie mineralnej. Celem badań była ocena wpływu nawożenia materiałami organicznymi na plon części nadziemnych i korzeni kukurydzy, zawartości w nim potasu oraz zawartości form przyswajalnych tego składnika w glebach o różnym składzie granulometrycznym. Ocenę wpływu nawożenia na zawartość potasu w kukurydzy przeprowadzono w 3-letnim dwuczynnikowym doświadczeniu wazonowym (czynniki: gleba, nawożenie). Do badań użyto materiału glebowego o składzie granulometrycznym piasku słabo gliniastego (psg), gliny piaszczystej pylastej (gpp) i gliny średniej pylastej (gśp). Osady ściekowe pochodziły z dwóch różnych komunalnych oczyszczalni mechaniczno-biologicznych. Mieszani ny osadów ściekowych z torfem sporządzono w stosunku wagowym 1:1, w przeliczeniu na suchą masę materiałów. W celu oznaczenia potasu materiał roślinny mineralizowano w piecu muflowym (temp. 450 st.C, 5 h), pozostałość roztworzono w rozcieńczonym kwasie azotowym. W materiale glebowym wysuszonym i przesianym przez sito o średnicy oczek 1 mm potas przyswajalny oznaczono metodą Egnera-Riehma. W uzyskanych roztworach materiału roślinnego oraz ekstraktach glebowych potas oznaczono metodą fotometrii płomieniowej. Nawożenie osadami ściekowymi i mieszaninami osadów z torfem działało korzystniej na plony kukurydzy niż nawożenie solami mineralnymi. W porównaniu z zastosowanymi doglebowo materiałami organicznymi, nawożenie solami mineralnymi istotnie zwiększyło zawartość potasu w biomasie kukurydzy. Zrównoważenie solami mineralnymi ilości potasu wprowadzanego z materiałami organicznymi i jego zbilansowanie nie zwiększyło zasobności gleby w potas przyswajalny, w porównaniu z zasobnością wyjściową, chociaż zaobserwowano różne zmiany w glebach po zastosowanym nawożeniu.
Źródło:: Journal of Elementology; 2008, 13, 4; 501-512
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Effects of different fertigation levels on maize yield and nutrient uptake under semi-arid mediterranean conditions
Autorzy:: Demirbas, A.
Akpinar, C.
Coskan, A.
Karakoy, T.
Powiązania:: https://bibliotekanauki.pl/articles/101047.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: fertigation
maize
second crop
yield
Opis:: The aim of the study was to evaluate the effect of four fertigation levels (25, 50, 75 and 100% of fertilizer dose, 240:100:200 kg N:P:K ha-1) and to compare with conventional practices (CP). The fertigation levels F1 25% of total fertilizer (60:25:50 kg N:P:K ha-1) treatments, F2 treatment is 50% of total fertilizer (120:50:100 kg N:P:K ha-1), F3 treatment is 75% of total fertilizer (180:75:150 kg N:P:K ha-1), F4 treatment is 100% of total fertilizer (240:100:200 kg N:P:K ha-1). The experiment was conducted during 2012 summer (from 20 June to 15 September) under the field conditions in the Menzilat soil series (Typic Xerofluvents) which is located in the East Mediterranean coastal part of Turkey. The experiment was designed as a completely randomized-block with three replications. The maize plant (Zea mays L.) was sown as second crop following with wheat cultivation. The maize yield was higher in F3 fertigation level treatment (12.47 Mg ha-1) compared to the other treatments. Lowest yield was recorded in F2 (8.45 Mg ha-1) treatment. The results shown that the half of the fertilizer application with conventional practices and the other half with fertigation are more efficient under Menzilat soil series conditions. For future, it is important to see the long term effect of fertigation on soil nutrients dynamic under the Mediterranean soil conditions.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2017, II/2; 727-736
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Yielding and Content of Selected Microelements in Maize Fertilized With Various Organic Materials
Autorzy:: Wieczorek, J.
Gambuś, F.
Czech, T.
Antonkiewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/124405.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: yield
maize
microelements
sewage sludge
Opis:: The paper aimed at comparing the yield and concentrations of zinc, copper and nickel in maize cultivated in soil fertilized with two different sewage sludge with yielding of maize fertilized with manure and solely with mineral fertilizers. The experiment was conducted in plastic pots, of which each contained 8.5 kg of air-dried soil with granulometric composition of light sandy loam and neutral pH. Sewage sludge used for the experiment originated from two municipal sewage sludge treatment plants in Krzeszowice (sludge I) and Niepołomice (sludge II), while manure from a private farm in Czernichów district. The test plant was maize (Zea mays) cultivated for 74 days and then harvested for green forage. On the basis of conducted research it was found that various fertilizer combinations applied in the experiment had a significant influence on the test plant yielding. All compared fertilizer variants allowed maize to produce statistically significantly higher yield in comparison with the yield harvested from the unfertilized soils. Fertilization with sewage sludge I supplemented with mineral treatment and application of solely mineral salts proved the most beneficial for the maize yield. Applied fertilizer combinations affected the content of microelements. The highest concentrations of nickel in maize green mass were assessed in plant samples from the unfertilized object, whereas zinc and copper from mineral fertilization variant. Except of zinc, introducing additional metal doses did not influence their increased content in plant organs. Soil enrichment with zinc contained in sewage sludge I and II (respectively 77.4 mg and 49.9 mg ∙ pot-1) contributed to its elevated concentration in maize roots but at the same time this metal content statistically significantly decreased in maize shoots in comparison with the amounts determined in plants fertilized with mineral materials.
Źródło:: Journal of Ecological Engineering; 2017, 18, 4; 219-223
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Comparison of stress susceptibility index of silage corn and sorghum crops
Autorzy:: Keten, Mualla
Değirmenci, Hasan
Powiązania:: https://bibliotekanauki.pl/articles/2131636.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: maize
sorghum
yield
stress susceptibility index
Opis:: Drought is an important factor that causes a decrease in yield and quality in regions where second crop silage plants are grown. One of the biggest problems in animal husbandry is feed. Especially silage feed production tends to decrease in areas with increasing water deficit and where water needs cannot be met. The high water requirement of the corn plant requires irrigation in arid and semi-arid regions. However, in order to continue the production of silage fodder in regions where water resources are insufficient with the increase of drought, it will be necessary to grow forage plants that can be an alternative to corn plant. In previous studies, it has been discussed whether the sorghum plant is an alternative to the corn plant. The aim of this study is to determine the drought sensitivity index based on the yield values of both plants in wet and dry conditions. Thus, it will be determined whether the sorghum plant will be an alternative to the corn plant in terms of drought. The identification and selection of drought-resistant cultivars and species is possible using various indices. In this study, second crop silage maize and sorghum crops were grown in Kahramanmaraş conditions for two years (2018 and 2019), dry and irrigated. Stress sensitivity index (SSI) was used to determine the drought tolerance of silage maize and sorghum crops. 'Colonia' variety was used for silage corn and 'Es Foehn' variety was used for sorghum. When the STI values are examined, the corn and sorghum values for 2018 were 0.55 and 0.53, respectively, while the d values for 2019 were found as 0.33 in corn and 0.54 in sorghum. these values are very close to the YSI values. While the 2018 values in both indices were not determinative in terms of drought resistance, the value of sorghum in 2019 was 64% higher than corn (this value was found to be 61% for YSI). This also showed that there is a direct correlation between YSI and STI indices.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2022, nr I/1; 21-28
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: An economic evaluation of the use of nitrogen fertilization and growth biostimulants in the production of maize grown for grain
Ekonomiczna ocena stosowania nawożenia azotem i biostymulatorów wzrostu w produkcji kukurydzy uprawianej na ziarno
Autorzy:: Niewęgłowski, M.
Szczygielska, M.
Kapela, K.
Sikorska, A.
Krasnodębska, E.
Zarzecka, K.
Gugała, M.
Powiązania:: https://bibliotekanauki.pl/articles/13095217.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:: maize
nitrogen fertilization
biostimulant
economic evaluation
yield
income
profitability
Źródło:: Agronomy Science; 2020, 75, 4; 75-84
2544-4476
2544-798X
Pojawia się w:: Agronomy Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effect of Compost from By-Product of the Fishing Industry on Crop Yield and Microelement Content in Maize
Autorzy:: Radziemska, M.
Mazur, Z
Powiązania:: https://bibliotekanauki.pl/articles/125267.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: compost
fish waste
maize (Zea mays L)
microelements
yield
Opis:: A pot experiment was conducted to compare the effects of compost from fish waste with mineral and manure fertilization on the yield and chemical composition of the overground parts of maize (Zea mays L.). The experiment comprised two series: I – composts at a dose of 1 g of compost per pot, and II – composts with 0.5 g of urea. The treatments were conducted on the following types of composts: compost 1: fish waste (80% d.m.), sawdust (20% d.m.); compost 2: fish waste (80% d.m.), straw (20% d.m.); compost 3: fish waste (80% d.m.), bark (20% d.m.); compost 4: fish waste (79.3% d.m.), sawdust (19.7% d.m.), lignite (1% d.m.); compost 5: fish waste (79.3% d.m.), straw (19.7% d.m.); lignite (1% d.m.); compost 6: fish waste (79.3% d.m.), bark (19.7% d.m), lignite (1% d.m). The contents of Ni, Zn, Cr, Cu and Cd were deter-mined in an air-acetylene flame using the flame atomic absorption spectrophotometric method. The average crop yield of the overground parts of maize in the series without additional mineral fertilization and with mineral N-fertilization was higher compared to objects without mineral N-fertilization. The highest crop yield was noted in the case of compost containing fish waste and straw with addition of lignite and with bark and lignite. The addition of lignite to the compost mass in the series with mineral N fertilization had stronger influence on the content of cadmium, chromium, nickel and zinc in the overground parts of maize.
Źródło:: Journal of Ecological Engineering; 2015, 16, 4; 168-175
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The reaction of two types of maize cultivars (zea mays l.) to different sowing density
Reakcja dwóch typów odmian kukurydzy (zea mays l.) na zróżnicowaną gęstość siewu
Autorzy:: Szulc, Piotr
Ambroży-Deręgowska, Katarzyna
Mejza, Iwona
Zawadzka, Agnieszka
Zielewicz, Waldemar
Byczkiewicz, Szymon
Powiązania:: https://bibliotekanauki.pl/articles/1333427.pdf
Data publikacji:: 2020-12-31
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: maize cultivars
sowing density
yield components
grain yield
odmiany kukurydzy
gęstość siewu
komponenty plonowania
plon ziarna
Opis:: The aim of the study was to determine the effect of sowing density on grain yield of two types of maize cultivars. The field experiment was carried out in 2012-2014 at the Department of Agronomy at the Poznań University of Life Sciences. The first order factor was: the cultivars SY Cooky and Drim “stay-green”, while the second order factor was: sowing den-sity of 6, 7, 8, 9 and 10 plants per 1 m-2. The thermal and humidity conditions in the growing seasons of maize significantly influenced grain yield, ear grain number, grain moisture and the number of production ears per area unit. The “stay-green” cultivar was characterized by significantly higher grain yield compared to the traditional cultivar. The increase in sowing density decreased 1000 seed weight and ear grain number, while it increased the number of production ears per area unit and maize grain moisture during harvest. No significant interaction of the studied types of maize cultivars with sowing density in shaping grain yield components, moisture and grain yield was demonstrated.
Celem pracy było określenie wpływu gęstości siewu na wielkość plonu ziarna dwóch typów odmian kukurydzy. Doświadczenie polowe prowadzono w latach 2012-2014 w Katedrze Agronomii Uniwersytetu Przyrodniczego w Poznaniu. Czyn-nikiem I rzędu była odmiana: SY Cooky i Drim „stay-green”, natomiast czynnikiem II rzędu gęstość siewu: 6, 7, 8, 9, 10 ro-ślin na 1 m-2.Warunki termiczne i wilgotnościowe w sezonach wegetacyjnych kukurydzy w istotny sposób kształtowały plon ziarna, liczbę ziaren w kolbie, wilgotność ziarna oraz liczbę kolb produkcyjnych na jednostce powierzchni. Mieszaniec w typie „stay-green” charakteryzował się istotnie wyższym plonem ziarna w porównaniu do odmiany tradycyjnej. Wzrost gęstości siewu spowodował spadek masy 1000 nasion i liczby ziaren w kolbie, natomiast zwiększyła się liczba kolb produkcyjnych na jednostce powierzchni oraz wilgotność ziarna kukurydzy podczas zbioru. Nie wykazano istotnego współdziałania ba-danych typów odmian kukurydzy z gęstością siewu w kształtowaniu komponentów plonu ziarna, wilgotności i plonu ziarna.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2020, 65, 2; 12-17
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effect of mineral fertilization on yield of maize cultivars differing in maturity scale
Wpływ nawożenia mineralnego na plon odmian kukurydzy o rożnej wczesności
Autorzy:: Barlog, P.
Frackowiak-Pawlak, K.
Powiązania:: https://bibliotekanauki.pl/articles/47219.pdf
Data publikacji:: 2008
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:: maize
maturity scale
mineral fertilization
plant cultivar
grain yield
yield component
magnesium
potassium
zinc
plant fertilization
Opis:: Field experiments were conducted in 2005-2007 at the Brody Experimental Station (52°26’ N; 16°17’ E) of the University of Life Sciences in Poznań with the following factors: 1) cultivars with different FAO number: 210, 240 and 260; 2) fertilization with K, Mg and Na: 0 (control), 150 kg K·ha-1, 150 kg K + 16.3 kg Mg·ha-1, 150 kg K + 16.3 kg Mg + 13.5 kg Na·ha-1; 3) Zn application: 0 (control), 1.5 kg Zn·ha-1 after sowing and 1.5 kg Zn·ha-1 at the 3-4 leaf stage. It was found that the grain yield depended more on the course of weather conditions than did plant residues yield. Maize response to potassium fertilization depended on the vegetation season. In the year favorable for the establishment of a high maize yield, simultaneous K and Mg fertilization at rates 150 and 16.3 kg·ha-1 induced a significant grain yield increase. The influence of zinc fertilization on grain yield depended both on the vegetative period and cultivar. Early maturing cultivars responded positively to Zn and the optimal date for Zn foliar application was the 3-4 leaf stage. Maize response to sodium supplementation was not detected.
Doświadczenia polowe przeprowadzono w latach 2005-2007 w Stacji Doś-wiadczalnej Brody (52°26’ N; 16°17’ E), należącej do Uniwersytetu Przyrodniczego w Poz-naniu. Czynnikami doświadczalnymi były: 1) odmiany o różnej liczbie FAO: 220, 240 i 260; 2) warianty nawożenia potasem, magnezem i sodem: 0 (kontrola), 150 kg K·ha-1, 150 kg K + 16,3 kg Mg·ha-1, 150 kg K + 16,3 kg Mg + 13,5 kg Na·ha-1; 3) nawożenie cynkiem: 0 (kontrola), 1,5 kg Zn·ha-1 po siewie i 1,5 kg Zn·ha-1 w fazie 3-4 liści. Od przebiegu pogody w większym stopniu zależał plon ziarna niż masa resztek pożniwnych. Reakcja kukurydzy na zastosowane warianty nawożenia potasem zależała od sezonu wegetacyjnego. W roku sprzyjającym wysokiemu poziomowi plonowania istotny przyrost plonu ziarna zapewniało jednoczesne nawożenie kukurydzy K i Mg (180 i 27 kg·ha-1). Wpływ nawożenia kukurydzy cynkiem na plon ziarna zależał od sezonu wegetacyjnego oraz wczesności odmiany. Dodatnio na nawożenie cynkiem reagowały odmiany wcześ-niejsze, a optymalnym terminem ich dokarmiania była faza 3-4 liści. Nie stwierdzono reakcji kukurydzy na uzupełnienie sodem nawożenia mineralnego.
Źródło:: Acta Scientiarum Polonorum. Agricultura; 2008, 07, 4
1644-0625
Pojawia się w:: Acta Scientiarum Polonorum. Agricultura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Impact of extreme climate years on relative "yield - evapotranspiration" relationships
Wpływ ekstremalnych warunków klimatycznych na względną zależność "plon - ewapotranspiracja"
Autorzy:: Mladenova, B.
Varlev, I.
Powiązania:: https://bibliotekanauki.pl/articles/293375.pdf
Data publikacji:: 2007
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: ewapotranspiracja
klimat
kukurydza
plon
współczynnik reakcji roślin na niedobory wody
climate
evapotranspiration
maize
yield
yield response factor
Opis:: The relative relationships "yield - evapotranspiration" were used long time ago. The well known linear relationship yi = 1 - ky (1 - ei), where yi is relative yield, ky - yield response factor and ei - relative evapotranspiration was proposed. It's usually assumed that ky is constant for a given crop and climatic conditions. It was found, however, that ky for late variety of maize H 708 varied through the study years (1984-1990) in the Plovdiv region ( South Bulgaria , altitude 150 m). During the dry years it was significantly higher than in the medium and humid years. The range of ky for maize in this location was 1.12-1.90, the average value being 1.50. The climate in the Sofia region (the experimental field of Chelopechene, altitude 550 m) is comparatively more humid. The two regions approximately outlined the boundaries of the appropriate economical conditions for grain maize production. The experiments in the Sofia region were carried out in the years 1994-2000. The seven years results for mean variety maize showed that the relationships "yield - evapotranspiration" and, respectively, ky varied at these climatic conditions too. The highest ky value was 1.41 for the driest year (2000) and the lowest value - 1.05 for the most wet years (1995, 1999). The value of ky for average years was 1.21. The yield response factor ky is of more significance when the relative evapotranspiration is less than 0.7-0.8. Thus, the extreme or the average values of ky could be used for the corresponding climatic regions. The relationships between ky and relative yield were established without considering irrigation.
W pracy przedstawiono wyniki badań nad plonami i ewapotranspiracją dwóch mieszańców kukurydzy. Badania te prowadzono w różnych okresach siedmioletnich w dwóch odmiennych klimatycznie regionach Bułgarii. Analizowane regiony wyznaczają granice obszarów opłacalnej uprawy kukurydzy na ziarno w tych warunkach klimatycznych. Przedstawiono analizę wartości wskaźnika ky w latach suchych, średnich i mokrych. Wykazano wyraźne zależności korelacyjne między plonami a ewapotranspiracją, potwierdzone bardzo wysokimi wartościami współczynników determinacji R2. Wartości ewapotranspiracji aktualnej ETa i potencjalnej ETm wyznaczono na podstawie zaleceń FAO. Badania udowodniły, że wartość ewapotranspiracji może ulec istotnej zmianie w wyniku ewentualnej zmiany klimatu. Już obecnie obserwuje się w Bułgarii wzrost temperatury i zmniejszenie opadów atmosferycznych, co może mieć duży wpływ na plonowanie roślin uprawnych.
Źródło:: Journal of Water and Land Development; 2007, 11; 71-77
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Relationships between selected traits in maize (Zea mays L.). Part 2. Multiple linear regression
Współzależność pomiędzy wybranymi cechami kukurydzy (Zea mays L.). Cz. 2. Liniowa regresja wielokrotna
Autorzy:: Bocianowski, Jan
Cyplik, Adrian
Szulc, Piotr
Kobus-Cisowska, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/336819.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: maize
multiple linear regression
grain yield
kukurydza
liniowa regresja wielokrotna
plon ziarna
Opis:: The study comprised of 13 maize cultivars, evaluated at two years in a randomized complete block design, with four replicates. To assess the quantitative impact of individual traits on the grain yield the multiple regression analysis was used. We observed grain yield and seven quantitative traits: SPAD, length of ears, number of kernels in row, damage of maize caused by P. nubilalis, infection of maize by Fusarium spp., number of ears and content of chlorophyll a.
Badanie obejmowało 13 odmian kukurydzy, analizowanych w dwóch latach w doświadczeniach polowych, w układzie bloków losowanych kompletnych, w czterech powtórzeniach. Do oceny wpływu poszczególnych cech ilościowych na plon ziarna zastosowano analizę funkcji regresji wielokrotnej. Obserwowano plon ziarna i siedem cech ilościowych: SPAD, długość kolby, liczba ziaren w rzędzie, procent roślin uszkodzonych przez P. nubilalis, porażenie przez Fusarium, liczba kolb oraz zawartość chlorofilu a.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2019, 64, 3; 15-19
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Some Physiological Responses and Yield of Maize Affected by Seed Aging and Priming Duration
Autorzy:: Ghassemi-Golezani, Kazem
Mamnabi, Sohrab
Powiązania:: https://bibliotekanauki.pl/articles/2199933.pdf
Data publikacji:: 2020-06-30
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: aging
grain yield
harvest index
hydro-priming
leaf area index
maize
Opis:: Seeds of maize (cv. SC AR68) were divided into three sub-samples, one of which with a 100% germina-tion was kept as high vigor seed lot (V1). The other two samples were artificially aged at 40°C for 2 and 3 days, reducing normal germination to 98% (V2) and 93% (V3), respectively. Each of these samples was subse-quently divided into four sub-samples, one of which was kept as unprimed and three other samples were hy-dro-primed at 15°C for 7, 14 and 21 h, and then their moisture content reduced to about 20% in a room at 20–22°C. The experiment was undertaken in 2016 as factorial based on randomized complete block design in three replicates. seed aging and hydro-priming had no significant effects on leaf temperature, Fv/Fm, CCI and plant biomass due to regular irrigation. Seed aging reduced, but hydro-priming enhanced LAI, grain yield and harvest index of the resultant plants. Grain yield of plants from high vigor seed lot (V1) was 23.5% and 64.5% greater than that of V2 and V3 plants. Seed hydro-priming for 21 h also increased grain yield of maize by about 32%. Therefore, hydro-priming for 21 h is the best pretreatment to improve field performance and yield of maize.
Źródło:: Plant Breeding and Seed Science; 2019, 79; 63-70
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Evaluation of yield, yield components and some physiological and qualitative traits of corn affected by chemical and biological nitrogen fertilizers
Autorzy:: Kordi, S.
Ghanbari, F.
Powiązania:: https://bibliotekanauki.pl/articles/12616968.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:: plant cultivation
maize
corn
yield evaluation
yield component
qualitative trait
physiological trait
chemical fertilizer
biological fertilizer
nitrogen fertilizer
Opis:: In order to evaluate the yield, yield components and some physiological and qualitative traits of corn treated with nitrogen fertilizers (biological, chemical and integrated), a field experiment was conducted at the Agricultural Research Station of Khorramabad during 2016 growing season. Treatments were arranged in a complete randomized block design with four replications. Experimental treatments consisted of 100% chemical fertilizer (urea), bio-fertilizer (nitroxin), integration of bio-fertilizer + 25% chemical fertilizer, integration of bio-fertilizer + 50% chemical fertilizer, integration of bio-fertilizer + 75% chemical fertilizer and the control. Results showed that the effect of different treatments of fertilizers on all measured traits, except for number of rows in each ear and carotenoids, was significant. The results indicated that integration of bio-fertilizer + 75% chemical fertilizer affected the highest grain yield (9.31 t ha–1), dry biological yield (20.96 t ha–1), number of kernels in each row (41.67), plant height (201.02 cm), hectoliter weight (0.82 g cm–3), chlorophyll b (0.43 mg g–1 FW), total chlorophyll (1.1 mg g–1 FW) and leaf area index (LAI) (4) and there was no significant difference among this treatment and 100% chemical fertilizer (N) and integration of bio-fertilizer + 50% chemical fertilizer treatments in all measured traits. The greatest harvest index (45.8) and grain protein-content (9.1%) resulted from the integration of biofertilizer + 50% chemical fertilizer treatment. Also the highest 1000-grains weight (281.13 g) and chlorophyll a (0.66 mg g–1 FW) were caused by 100% chemical fertilizer (urea) treatments. Results showed that integration of bio-fertilizer + chemical fertilizer could be considered as a means to reduce the consumption of chemical fertilizers for sustainable agriculture.
Źródło:: Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 1; 3-12
1644-0692
Pojawia się w:: Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: The model CORNWAY - a tool for analysingn the relation between soil-water regime and the yield of maize [Zea mays L.]
Autorzy:: Majercak, J.
Novak, V.
Vidovic, J.
Powiązania:: https://bibliotekanauki.pl/articles/24194.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: CORNWAY model
Zea mays
soil water
corn
grain yield
GLOBAL model
stress factor
yield
water regime
maize
Źródło:: International Agrophysics; 1996, 10, 4
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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