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Wyszukujesz frazę "nitrogen efficiency" wg kryterium: Temat


Tytuł:
Influence of formulation of phosphorus fertilizer on nitrogen uptake and its efficiency under maize grain cropping
Wpływ formy nawozu fosforowego na pobranie i efektywność azotu w uprawie kukurydzy na ziarno
Autorzy:
Potarzycki, J.
Powiązania:
https://bibliotekanauki.pl/articles/47401.pdf
Data publikacji:
2009
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:
phosphorus
phosphorus fertilization
nitrogen uptake
nitrogen efficiency
maize
grain crop
superphosphate
nitrogen content
Opis:
The aim of the paper was to evaluate the efficiency of nitrogen from ammonium saltpeter as related to the formulation of phosphorus fertilizer under maize grain cropping. Maize was grown in monoculture throughout the consecutive years 2003- -2007. A two factorial field experiment was established at a farm located in Nowa Wieś Królewska (52o26’ N; 17o57’ E) on a slightly acidic soil, moderately rich in phosphorus. Experimental factors were as follows: (i) chemical formulation of the fertilizer, (partially acidulated phosphate rock – PAPR, simple superphosphate – SSP and triple superphosphate – TSP), (ii) nitrogen rate: 80 and 140 kg N·ha-1; a phosphorus unfertilized treatment was also considered. The type of phosphorus fertilizer did not differentiate nitrogen uptake, but the lack of phosphorus at the applied rate has induced a decrease in nitrogen accumulation in the aboveground biomass, on average by 8%. Phosphorus fertilization at the rate 26.4 kg P·ha-1 was the main determinant of nitrogen uptake by the kernels. Nitrogen recovery (R) from the fertilizers as well as its agronomical (AE) and physiological (PE) efficiency were significantly lower in treatments where phosphorus was not applied. Furthermore, it was found a positive effect of sulphur from simple superphosphate on the AE after the application of 80 kg N·ha-1. The R values did not depend on the chemical formulation of phosphorus in the fertilizer and amounted on average to 74 and 59% for the rates 80 and 140 kg N·ha-1, respectively, whereas for the treatment without P, these values varied within the range 46-54%.
Celem pracy była ocena efektywności azotu z saletry amonowej w zależności od formy nawozu fosforowego w uprawie kukurydzy przeznaczonej na ziarno. Kukurydzę uprawiano w latach 2003-2007 w monokulturze. Dwuczynnikowe doświadczenie założono w gospodarstwie zlokalizowanym w Nowej Wsi Królewskiej (52o26’ N; 17o57’ E), na glebie lekko kwaśnej, średnio zasobnej w przyswajalny fosfor. Czynniki doświadczalne: (i) formulacja chemiczna nawozu (częściowo rozłożony fosforyt – PAPR, superfosfat prosty – SSP oraz superfosfat potrójny – TSP), (ii) dawka azotu (80 i 140 kg N·ha-1); analizowano także wariant bez nawożenia fosforem. Forma nawozu fosforowego nie różnicowała pobrania azotu, natomiast brak fosforu w dawce nawozowej prowadził do zmniejszenia akumulacji azotu w biomasie nadziemnej średnio o 8%. Nawożenie fosforem w dawce 26,4 kg P·ha-1 determinowało pobranie azotu przez ziarniaki. Wykorzystanie azotu z nawozów (W) oraz efektywność agronomiczna (EA) i fizjologiczna (EF) tego składnika były istotnie mniejsze w warunkach braku nawożenia fosforem. Potwierdzono dodatnie działanie siarki z superfosfatu prostego na EA po zastosowaniu 80 kg N·ha-1. Wartości W nie zależały od formulacji chemicznej fosforu w nawozie i wynosiły średnio 74 i 59% odpowiednio dla dawek 80 i 140 kg N·ha-1, a na kontroli (bez P) wahały się w granicach 46-54%.
Źródło:
Acta Scientiarum Polonorum. Agricultura; 2009, 08, 3
1644-0625
Pojawia się w:
Acta Scientiarum Polonorum. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Productivity, nitrogen use efficiency and water use efficiency of maize for grain in long term field experiments
Autorzy:
Rutkowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2148504.pdf
Data publikacji:
2019-06-30
Wydawca:
Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:
Zea mays
nitrogen rates
Nitrogen Use Efficiency (NUE)
Water Use Efficiency (WUE)
nitrogen surplus
Opis:
11Abstract. Maize, one of the most important cereals species grown in Poland, use large quantities of nitrogen, but water defi-cit through the vegetation period might lead to yield reduction and diminish nitrogen uptake. The aim of the study was to char-acterize the productivity of the crop, depending on its nitrogen and water use efficiency. In two locations, in Western and Eastern Poland, eleven-year field experiments with maize grown for grain were conducted. Maize was fertilized with increasing rates of ni-trogen: 50, 100, 150, 200 i 250 kg N ha-1. It was found, that grain yields of maize raised statistically significant up to 8.03 tha-1 under 150 kg Nha-1. Such a dose guaranteed: nitrogen uptake 182 kg Nha-1, nitrogen use efficiency 121%, nitrogen surplus -32 kg Nha-1, water use efficiency 14.5 kgha-1 mm-1, and nitro-gen utilization efficiency 43 kgkg-1. Increasing nitrogen doses over the years was not justified because maize productivity was limited by water availability under higher nitrogen rates.
Źródło:
Polish Journal of Agronomy; 2019, 37; 11-15
2081-2787
Pojawia się w:
Polish Journal of Agronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Productivity of winter oilseed rape depending on its nitrogen and water use efficiency
Autorzy:
Rutkowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2147964.pdf
Data publikacji:
2019-12-30
Wydawca:
Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:
Brassica napus L.
nitrogen rates
Nitrogen Use Efficiency (NUE)
Water Use Efficiency (WUE)
nitrogen surplus
Opis:
This paper presents the results of 11 years of field experimentconcerning winter oilseed rape in Eastern Poland. Theaim of the study was to characterise rape production dependingon the nitrogen and water use efficiency. Oilseed rape was fertilisedwith increasing doses of nitrogen, i.e. 50, 100, 150, 200and 250 kg N ha-1. It was found that rapeseed yields increasedstatistically significantly to 3.33 t ha-1 at a rate of 200 kg N ha-1.This dose guaranteed: nitrogen uptake of 155 kg N ha-1, nitrogenuse efficiency of 78%, nitrogen surplus of 45 kg N ha-1, wateruse efficiency of 8.4 kg ha-1 mm-1 and nitrogen utilisation efficiencyof 22 kg kg-1. Increasing the nitrogen rate in the long termto 250 kg N ha-1 proved to be unjustified because it did not causea significant increase in the yield or water use efficiency, while itsignificantly increased the nitrogen uptake, its surplus in the soiland reduced the efficiency of nitrogen from fertilisers utilisation.
Źródło:
Polish Journal of Agronomy; 2019, 39; 10-15
2081-2787
Pojawia się w:
Polish Journal of Agronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of fertilization with sulphur on uptake and utilization of nitrogen by winter wheat
Autorzy:
Winiarski, Ryszard
Ochal, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2147734.pdf
Data publikacji:
2021-09-30
Wydawca:
Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:
nitrogen doses
sulphur fertilization
nitrogen uptake
efficiency of nitrogen utilization
Opis:
This paper presents the results of a four-year field study on the effect of sulphur fertilization on nitrogen uptake and its utilization efficiency by winter wheat. A two-factor field ex- periment was carried out over 1999–2002 in a randomized blocks design. The first factor was fertilization with sulphur (in the form of sulphate) in doses of 0 and 60 kg ha-1, while the second fac- tor – nitrogen fertilization (in the form of ammonium nitrate) in doses of 0, 30, 60, 90, 120 and 150 kg N ha-1. Nitrogen was ap- plied in doses of 30 kg N ha-1, at two-week intervals after the start of growing season. The research showed that sulphur fertiliza- tion increased on average the nitrogen uptake by wheat by 3.5%. The efficiency index of nitrogen fertilization of wheat had higher values after application of fertilizers containing sulphur with a tendency to decrease as the dose N increased. Sulphur fertiliza- tion increased the agronomic efficiency of nitrogen in the range of low doses from 30 to 90 kg N ha-1.
Źródło:
Polish Journal of Agronomy; 2021, 46; 31-37
2081-2787
Pojawia się w:
Polish Journal of Agronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genome-wide identification and characterisation of ammonium transporter gene family in barley
Autorzy:
Tanwar, Umesh K.
Stolarska, Ewelina
Paluch-Lubawa, Ewelina
Rudy, Elżbieta
Sobieszczuk-Nowicka, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/28411631.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
ammonium transporter
AMT
bioinformatics
gene expression
barley
Hordeum vulgare
nitrogen use efficiency
Opis:
Nitrogen (N) is an essential macronutrient for the growth and development of plants, but excessive use of nitrogen fertiliser in agriculture can result in environmental pollution. As a preferred nitrogen form, ammonium (NH4+) is absorbed from the soil by the plants through ammonium transporters (AMTs). Therefore, it is important to explore AMTs to improve the efficiency of plant N utilisation. Here, we performed a comprehensive genome-wide analysis to identify and characterise the AMT genes in barley (HvAMTs), which is a very important cereal crop. A total of seven AMT genes were identified in barley and further divided into two subfamilies (AMT1 and AMT2) based on phylogenetic analysis. All HvAMT genes were distributed on five chromosomes with only one tandem duplication. HvAMTs might play an important role in plant growth, development, and various stress responses, as indicated by cis-regulatory elements, miRNAs, and protein interaction analysis. Further, we analysed the expression pattern of HvAMTs in various developmental plant tissues, which indicated that AMT1 subfamily members might play a major role in the uptake of NH4+ from the soil through the roots in barley. Altogether, these findings might be helpful to improve the barley crop with improved nitrogen use efficiency, which is not only of great significance to the crop but also for land and water as it will reduce N fertiliser pollution in the surrounding ecosystem.
Źródło:
Journal of Water and Land Development; 2023, 58; 220--233
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nitrogen relationships in Polish cropping systems
Autorzy:
Faber, Antoni
Jarosz, Zuzanna
Jędrejek, Anna
Kopiński, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2203525.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
crops
nitrogen
trends
use efficiency
surplus
Opis:
Based on FAO data, the paper presents trends in nitrogen (N) input and output in Poland. As N input (Ninp), nitrogen from mineral fertilisers, manure application, biological fixation, and deposition was included. The N outputs (Nout) include the N contained in crop harvest (main products and by-products). The trend analyses were carried out for the period before (1961-1989) and after (1990-2018) the changes in the political and economic systems. Additionally, trends in the nitrogen use efficiency (NUE) and nitrogen surpluses (NS) are presented for these periods. In both compared periods, the mean values of N budget indicators in Poland were (kg N∙ha-1 UAA): Ninp 120 and 125, Nout 61 and 84, NS 60 and 41 and NUE 53 and 67%, respectively. The estimated Ymax, which represents the Nout value reached at saturating N fertilisation, reached the values of 127 and 263 kg N∙ha-1 UAA in these periods. The difference in these values suggests a significant impact of agronomy improvement on Nout in the recent period. The trends of nitrogen within 16 regions in period 2002-2019, based on national data, resulted in a significant variation in N indicators. The values found were in the following ranges (kg N∙ha-1 UAA): Ninp 78-167; Nout 62-99; NS 15-83 and Ymax 139-317. The NUE ranged from 50-81%. The obtained results indicate that in Poland and its regions there is still a need to improve of the nitrogen efficiency.
Źródło:
Journal of Water and Land Development; 2023, 56; 27--36
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dry matter accumulation nitrogen and phosphorus uptake in winter triticale genotypes differing in mineral elements utilization efficiency
Autorzy:
Ciepły, Jan
Oracka, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/2198790.pdf
Data publikacji:
2000-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
triticale
genotypic variation
nitrogen
phosphorus
utilization efficiency
Opis:
In our previous studies we found the considerable genotypic variation in N, P, K utilization efficiency at shooting phase of winter triticale plants. The objective of this study was to confirm whether, genetic differences in mineral element utilization at the shooting phase, were related to productivity as well as was nitrogen and phosphorus accumulation by winter triticale plants during entire growth period. The experiment was conducted at reduced level of mineral elements in water culture (50% of standard Hoagland solution) under controlled environments (growth chambers) to full maturity. The efficient winter triticale genotypes showed significantly higher dry matter, nitrogen and phosphorus content and N, P utilization efficiency during the whole growth period. Furthermore these genotypes had higher grain yield and harvest index in comparison to inefficient genotypes. The efficient winter triticale genotypes accumulated most of biomass in post-anthesis period and N, P uptake remained high until the late maturation.
Źródło:
Plant Breeding and Seed Science; 2000, 44; 3-13
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of mineral nitrogen fertilization of early potato varieties in integrated production
Autorzy:
Trawczynski, C.
Powiązania:
https://bibliotekanauki.pl/articles/1192720.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
efficiency indicators
nitrogen dose
potato
tuber quality
yield
Opis:
Based on a 3-year field study, the effect of mineral nitrogen fertilization on the yield, selected tuber quality characteristics and fertilization efficiency indicators for early potato varieties grown in the integrated production system were determined. The quality of tubers was assessed according to the percentage share of tuber size and their external defects in the yield structure, starch content, dry matter, nitrates (V), protein and total nitrogen in tubers. The efficiency of fertilization with mineral nitrogen was expressed by the agronomic efficiency (AE), physiological efficiency (PE) and fertilizer recovery efficiency (FRE) by tubers. Two experimental factors were considered: nitrogen dose (0, 50, 100, 150 kg ha-1) and varieties (Bohun, Lady Rosetta, Lawenda, Madeleine, Magnolia). The increase in the dose of mineral nitrogen contributed to a significant increase in the yield structure of tubers with a diameter above 60 mm, the content of nitrates (V), protein, total nitrogen, the uptake of nitrogen and a decrease in nitrogen fertilization efficiency indicators. It was shown that the Lady Rosetta and Lawenda varieties were characterized by higher requirements concerning the optimal nitrogen dose than the other varieties. Nitrogen fertilization efficiency, the content of nitrates (V) and tuber greening were determined mainly by the weather conditions, while the yield, nitrogen content and uptake by tubers were determined by the fertilizing factor, and the remaining tuber quality features were shaped to the greatest extent by the genotype. In a wet year, a significantly higher tuber yield, more large tubers in the structure and higher nitrogen fertilization efficiency were obtained. In years with rainfall deficit, a higher content of total nitrogen, protein, nitrates (V) in tubers and higher nitrogen uptake were found than in a wet year.
Źródło:
Journal of Elementology; 2021, 26, 1; 109-123
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic efficiency of the production of spring wheat fertilized with sulfur against the background of various nitrogen doses
Autorzy:
Klikocka-Wiśniewska, Olimpia
Harasim, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/2148467.pdf
Data publikacji:
2022-06
Wydawca:
Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:
spring wheat
nitrogen and sulfur fertilization
economic efficiency
Opis:
The research was carried out on a farm located in Mal- ice (Werbkowice municipality), in the years 2014–2016. The aim of the study was to evaluate the profitability and marginal eco- nomic efficiency of sulfur fertilization of spring wheat at vari- ous levels of nitrogen fertilization. Production value, direct costs and production profitability were assessed, as well as the mar- ginal economic efficiency. On average, the highest grain yield was achieved on the object fertilized with nitrogen at a dose of 150 kg. ha-1 and sulfur in the amount of 40 kg S ha-1. The highest value of direct surplus and, at the same time, the highest profit- ability of production was obtained after nitrogen application in the dose of 100 kg N ha-1. Increasing the nitrogen dose from 50 to 100 kg ha-1 resulted in a significant increase in the grain yield and the achievement of the most favourable marginal economic efficiency index. Among the objects fertilized with nitrogen, the most advantageous in terms of production profitability and mar- ginal economic efficiency was the use of this element in the dose of 100 kg N ha-1. The use of sulfur in the fertilization of spring wheat in the dose of 40 kg S ha-1 slightly improved the fertiliza- tion efficiency in the objects with 50 and 150 kg ha-1. Among the objects fertilized with nitrogen, the most advantageous in terms of production profitability and marginal economic efficiency was the use of this element in the dose of 100 kg N ha-1.
Źródło:
Polish Journal of Agronomy; 2022, 49; 3-8
2081-2787
Pojawia się w:
Polish Journal of Agronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variability in N, P, K utilization efficiency in spring wheat at different concentration of nutrient solutions.
Autorzy:
Oracka, Teresa
Ciepły, Jan
Kozdój, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/2198778.pdf
Data publikacji:
2000-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
spring wheat
genetic variability
nitrogen
phosphorus
potassium utilization efficiency
Opis:
From the ecological and economic points of view it is necessary to change agricultural practice towards low- input cultivation systems. This requires breeding of new cultivars with improved utilization efficiency of mineral nutrients. The response of fifty spring wheat cultivars representing different origin and years of release (from 1990 to 1996) to different concentrations of the Hoagland nutrient solution was investigated under controlled conditions (climatic chamber). A wide variability in N, P, K contents, their utilization efficiency and production of dry matter was found among wheat cultivars at the shooting phase of plant development at all nutrient concentrations applied. The variability coefficient decreased with the increasing concentration of Hoagland solution. Old Polish cultivars (released 1900 – 1960) and most of the intermediate cultivars (released 1961 – 1980) showed high of N, P, K utilization efficiency. The modern cultivars (released after 1981) showed either high or low N, P, K utilization efficiency. This efficiency was determined by dry matter (r= 0.94 - 0.98) and N, P, K contents (r= 0.62 - 0.94). The majority of spring wheat cultivars showed almost linear response of the evaluated parameters to increased nutrient concentration in Hoagland solution. It was been proved that genetic variability of N, P, K utilization efficiency can be assessed as early as at shooting phase.
Źródło:
Plant Breeding and Seed Science; 2000, 44; 15-25
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of sprinkler irrigation and nitrogen fertilization on the quality of malt and wort from barley grains
Autorzy:
Błażewicz, J.
Żarski, J.
Dudek, S.
Kuśmierek-Tomaszewska, R.
Powiązania:
https://bibliotekanauki.pl/articles/101297.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
malting barley
sprinkler irrigation
nitrogen fertilization
malt
wort
simplified mashing efficiency
Opis:
The aim of the research was the evaluation of sprinkler irrigation and nitrogen fertilization on some selected features of the quality of malt and wort from ‘Marthe’ and ‘Mauritia’ malting barley grains. The field experiment was carried out in the years 2010-2012 at the Research Station of the University of Science and Technology in Mochełek near Bydgoszcz. As a result of 3-year field experiment and laboratory test of grain, malt and wort, it was found that introducing sprinkler irrigation into the production process of malting barley is a step justified by the obtained quality effects. It was found that in the case of irrigated malting barley cultivations nitrogen fertilization at the rate of 30 kg·ha-1 provides (in relation to control, non-irrigated treatment) the highest values of such parameters as weight of the technical barley crops, content of protein, extractivity of Pilsen type malt, amount of obtained wort and simplified mashing efficiency. The combination of sprinkler irrigation of malting barley plants with their nitrogen fertilization at the increased rates of 60 and 90 kg·ha-1, resulted in the following effect – high mass of the usable grain of crops remained but their quality deteriorated. Malt produced from malting barley fertilized with nitrogen at the rates of 60 and 90 kg·ha-1, in spite of applied sprinkler irrigation, was characterized by unacceptable – from the technological point of view - increased content of protein in malt in the amount of over 11.5% d.m., as well as huge decrease in malt extractivity (even by 2%) and lower, simplified mashing efficiency (below 70%).
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, IV/1; 1469-1481
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological nitrogen in Belarusian farming
Autorzy:
Persikova, T.F.
Tsyganov, A.R.
Vildflush, I.R.
Powiązania:
https://bibliotekanauki.pl/articles/9740354.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
nitrogen
biological nitrogen
clover
lupin
wheat
potato
organic matter
mineral fertilizer
application method
bacterial preparation
growth regulator
productivity
quality
soil fertility
efficiency
forecast
farming
Belorussia
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2004, 59, 4; 1651-1661
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of nitrogen fertilization on yield efficiency and quality of tubers potato varieties cultivated in an integrated production system
Wpływ nawożenia mineralnego azotem na efektywność plonowania i jakość bulw odmian ziemniaka uprawianych w integrowanym systemie produkcji
Autorzy:
Trawczyński, Cezary
Powiązania:
https://bibliotekanauki.pl/articles/2199470.pdf
Data publikacji:
2020-02-12
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
wskaźniki efektywności
dawki azotu
odmiany ziemniaka
jakość bulw
plon
efficiency indicators
nitrogen doses
potato varieties
quality
yield
Opis:
The aim of the research conducted in the years 2016 – 2018 was to perform the effect of nitrogen on the total yield and quality evaluation of edible and starch potato varieties harvested after tuber maturity, as well as to establish fertilization efficiency indices. The quality of tubers was expressed: yield structure, share of deformations, content of starch and nitrates (V), but the nitrogen utilization efficiency as agronomic efficiency (AE) and fertilizer recovery efficiency (FRE) in tubers. Two experimental factors were researched: nitrogen doses (0, 50,100, 150 kg·ha-1) and varieties (Impresja, Mazur, Otolia, Szyper and Widawa) tested under different weather conditions. The total yield fresh matter between nitrogen doses ranged from 42.8 to 53.7 t·ha-1 and for varieties from 42.1 (var. Szyper) to 54.8 t·ha-1 (var. Impresja). Increasing nitrogen doses caused an increase share in the yield structure big tubers (diameter above 60 mm), nitrates (V) and total nitrogen content and nitrogen uptake with tuber yield, but decrease starch content and nitrogen fertilization efficiency indicators. On the basis of quadratic function parameters, it was shown that the varieties of Impresja, Szyper and Otolia were characterized by greater requirements in relation to the optimal nitrogen dose than the varieties of Mazur and Widawa. More assessed features determined  the weather conditions during the growing season than the factors studied: the nitrogen fertilization dose and the variety. In the year with the highest amount of rainfall in relation to the average of many years, the largest decrease was recorded: tuber yield, share of big tubers in the yield structure, nitrogen uptake and agronomic efficiency. Year with the most rainfall was characterized by the highest reduction the yield of tubers, share big tubers in the yield structure, nitrogen uptake and its agronomic efficiency.  
Celem badań przeprowadzonych w latach 2016–2018 było określenie wpływu nawożenia mineralnego azotem na plon ogólny i wybrane cechy jakości bulw odmian jadalnych i skrobiowych ziemniaka zbieranych po dojrzeniu bulw, a także ustalenie wskaźników efektywności nawożenia. Jakość bulw oceniono na podstawie ich struktury, zdeformowania, zawartości skrobi i azotanów, a wydajność nawożenia azotem mineralnym wyrażono efektywnością agronomiczną (AE) i efektywnością odzyskania nawozów (FRE) przez bulwy. W badaniach uwzględniono dwa czynniki doświadczalne: dawkę azotu (0, 50, 100, 150 kg·ha-1) i odmiany (Impresja, Mazur, Otolia, Szyper i Widawa) uprawiane z uwzględnieniem warunków pogodowych. Ogólny plon świeżej masy bulw pomiędzy dawkami azotu (0–150 kg·ha-1) zawierał się od 42,8 do 53,7 t·ha-1, a dla odmian od 42,1 (odmiana Szyper) do 54,8 t·ha-1 (odmiana Impresja). Zwiększenie dawki azotu spowodowało wzrost udziału w strukturze plonu bulw dużych (o średnicy powyżej 60 mm), zawartości azotanów (V) i azotu ogólnego oraz pobranie azotu z plonem bulw, natomiast wpłynęło na zmniejszenie zawartość skrobi w bulwach i wskaźników efektywności nawożenia azotem. Na podstawie parametrów funkcji kwadratowej wykazano, że odmiany Impresja, Szyper i Otolia charakteryzowały się większymi wymaganiami w stosunku do optymalnej dawki azotu niż odmiany Mazur i Widawa. Więcej ocenianych cech determinowały warunki pogodowe w okresie wegetacji, niż badane czynniki: dawka nawożenia mineralnego azotem i odmiana. W roku o najwyższej ilości opadów w stosunku do średniej z wielolecia stwierdzono największe zmniejszenie: plonu bulw, udziału bulw dużych w strukturze plonu, pobrania azotu i efektywności agronomicznej.  
Źródło:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2020, 288; 15-22
0373-7837
2657-8913
Pojawia się w:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of nitrogen fertilization on the seed yield and the content and quality of fat in pot marigold (Calendula officinalis L.) cultivars
Wpływ nawożenia azotem na plon nasion oraz zawartość i jakość tłuszczu wybranych odmian nagietka lekarskiego (Calendula officinalis L.)
Autorzy:
Król, B.
Powiązania:
https://bibliotekanauki.pl/articles/13091175.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
pot marigold
Calendula officinalis
nitrogen fertilization
fertilization efficiency
seed yield
fat yield
fatty acid composition
calendic acid
Źródło:
Agronomy Science; 2017, 72, 3; 85-98
2544-4476
2544-798X
Pojawia się w:
Agronomy Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth and Yield Response of Maize (Zea mays L.) to a Wide Range of Nutrients on Ferralsols of Western Kenya
Autorzy:
Otieno, Hillary M. O.
Powiązania:
https://bibliotekanauki.pl/articles/1075498.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Agronomic efficiency
Zea mays
crop growth rates
fertilizer application
maize
micronutrients yield response
nitrogen response
phosphorus response
potassium response
relative growth rate
Opis:
Declining soil fertility is one of the main causes of low yields of maize. Farmers apply low rates of unbalanced nutrients leading to further nutrient mining. A randomized complete block nutrient omission trial with six replications was therefore set to determine maize response to the application of a wide range of nutrients from inorganic fertilizers on Ferralsols. The treatments were NK, NP, PK, NPK, and NPK + CaMgZnBS. The results showed that application of PK fertilizer resulted in low crop growth rate (CGR), and relative growth rate (RGR), and biomass compared to other treatments. Application of a wider range of nutrients (NPK + CaMgZnBS treatment) improved maize growth and yield compared to other treatments. In terms of grain response, Urea application recorded the highest yield (1800 kg/ha) followed by Triple Superphosphate (1300 kg/ha) then Muriate of potash (1100 kg/ha) and least by a combined application of secondary nutrients and micronutrients (ZnBMgCaS = 400 kg/ha). Highest agronomic efficiency of 32.5 kg grain /kg P applied was recorded due to P followed by K (27.5 kg grain /kg K) and least by N (15 kg grain /kg N). Based on the combined effect, application of N-P-K based fertilizers could give better yields. Use of micronutrients should be assessed further for conclusive recommendations.
Źródło:
World Scientific News; 2019, 129; 96-106
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł

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