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    Wyświetlanie 1-6 z 6
    Tytuł:
    Effect of Plant Population on the Growth and Yield of Mucuna Flagellipes (Vogel ex Hook) in an Ultisol, South Nigeria
    Autorzy:
    Agba, O. A.
    Adiaha, M. S.
    Asiegbu, J. E.
    Mbah, B. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192609.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Mucuna flagellipes
    plant population
    growth and yield
    Opis:
    The effect of plant population on the growth and yield Mucuna flagellipes (Vogel ex Hook) was conducted for two cropping seasons (2013 and 2014) in the Teaching and Research farm, Department of Agronomy, Cross River University of Technology Obubra, Cross River State. The experimentwas laid out in a randomized complete block design (RCBD). Treatments comprised four plant populations of 33,333, 16,666, 10,000 and 8,333 plants/ha and there were three replications. Data collected were statistically analyzed using Analysis of Variance (ANOVA) procedure for a randomized complete block design. Close spacing with high plant population significantly (p < 0.05) reduced the number of leaves, branches and dry matter of plant fractions per plant. The longest vine of 594.1 and 651.3cm and leaf area index of 7.462 and 7.609 were produced in plant population of 33,333 plants/ha at 24 WAP in 2013 and 2014 cropping seasons respectively. Pod and seed yield per plant were higher in plots with the least plant population of 8,333 plants/ha as compared with other higher plant population of 33,333 and 16,666 plants/ha. The highest Mucuna flagellipes seed yield of 2.85 and 2.91 tons/ha were produced from plots with 33,333 plants/ha in 2013 and 2014 cropping seasons.
    Źródło:
    World Scientific News; 2016, 60; 1-12
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of biodynamic preparations on the growth and yield parameters of potatoes with coloured flesh
    Wpływ preparatów biodynamicznych na wzrost i plonowanie bulw ziemniaków o kolorowym miąższu
    Autorzy:
    Jarienė, Elvyra
    Danilčenko, Honorata
    Vaitkevičienė, Nijole
    Kita, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2198686.pdf
    Data publikacji:
    2014-06-30
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    parametry wzrostu i plonu
    preparaty biodynamiczne
    ziemniak o kolorowym miąższu
    biodynamic preparations
    coloured fleshed potato
    growth and yield parameters
    Opis:
    Biodynamic agriculture is one of the organic agricultural farming methods. Different from organic farmers, biodynamic farmers add eight specific preparations (made from cow manure, silica, and various plants) to improve crops growth and nutrient composition. In 2012–2013, in organic farm (Prienai district), potato cultivars with coloured flesh were grown for research. The aim of two years’ research was to evaluate effects of biodynamic (BD) preparations (500 and 501) on the growth and yield parameters of the coloured fleshed potatoes. An experiment included two factors: I — three potato cultivars (purple fleshed — Vitelotte, Blue Congo and red-fleshed Red Emmalie), II — using of BD preparations in field sprays (four treatments: 1. Control without BD preparations; 2. BD preparation 500; 3. BD preparation 501; 4. complex application of BD preparations (500+501). The individual productivities of potato plants were analyzed in the field experiment (chlorophyll content index values of leaves, tuber weight per plant and tuber number per plant). The results revealed that combination of BD preparations (500 + 501) was the best among all the treatments for most of the growth and yield parameters under study. It was found, that, compared with the control variant, combination of BD preparations (500 + 501) substantially increased the chlorophyll content index in leaves, the weight and number of tubers per plant of cvs. Blue Congo and Red Emmalie. BD preparation 501 substantially increased the chlorophyll content index in leaves of Red Emmalie at 9th (1.07 times) and 13th (1.13 times) week, and of Blue Congo only at 9th (1.07 times) week after planting. However, more research is needed to determine whether the BD preparations affect growth and yield parameters of colour-fleshed potato tubers.
    Rolnictwo biodynamiczne jest jedną z metod rolnictwa ekologicznego. W uprawie biodynamicznej, w celu poprawy jakości plonu i kompozycji składników odżywczych w surowcu, wykorzystuje się osiem konkretnych preparatów (z nawozu krowiego, krzemionki i różnych roślin). Materiałem użytym do badań były ziemniaki odmian o kolorowym miąższu uprawiane w gospodarstwie ekologicznym (powiat Prienai) w latach 2012–2013. Celem badań było określenie wpływu preparatów biodynamicznych (BD) 500 i 501 na parametry wzrostu i wydajność plonu ziemniaków o kolorowym miąższu. Eksperyment obejmował dwa czynniki: I — odmiany ziemniaka (dwie odmiany ziemniaków z niebieskim miąższem — Blue Congo i Vitelotte oraz jedna z czerwonym — Red Emmalie), II — wykorzystanie preparatów biodynamicznych do oprysków gleby i roślin (cztery zabiegi: 1. kontrola bez preparatów BD 2. z zastosowaniem preparatu biodynamicznego 500; 3. z zastosowaniem preparatu biodynamicznego 501; 4. z zastosowaniem obu preparatów biodynamicznych (500 + 501). Produktywność roślin ziemniaka oznaczano w doświadczeniu polowym (wartość indeksu zawartości chlorofilu w liściach, masę i liczbę bulw pod krzewem). Najlepsze parametry wzrostu uzyskano przy zastosowaniu kombinacji preparatów biodynamicznych (500 + 501). Stwierdzono, że w porównaniu z wariantem kontrolnym stosowanie obu preparatów (500 + 501), istotnie zwiększyło zawartość chlorofilu w liściach oraz masę i liczbę bulw z jednej rośliny w odmianach ziemniaka Blue Congo i Red Emmalie. Preparat 501 istotnie zwiększał wskaźnik zawartości chlorofilu w liściach odmiany Red Emmalie w 9 (1.07 razy) i 13 (1.13 razy) tygodniu, a Blue Congo tylko w 9 (1.07 razy) tygodniu po posadzeniu. Niezbędne są jednakże dalsze badania, które pozwolą na ustalenie czy preparaty biodynamiczne istotnie wpływają na parametry wzrostu i plonowanie bulw ziemniaka o kolorowym miąższu.
    Źródło:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2014, 272; 73-79
    0373-7837
    2657-8913
    Pojawia się w:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ trzebieży na wzrost i produkcyjność drzewostanów sosnowych na przykładzie doświadczenia w Kazlu Ruda (Litwa)
    Impact of thinning on the growth and yield of Scots pine stands – a case study from Kazlu Ruda (Lithuania)
    Autorzy:
    Linkevicius, E.
    Bijak, S.
    Godvod, K.
    Petrauskas, E.
    Tiskute-Memgaudiene, D.
    Valiukaite, R.
    Sapokas, A.
    Satinskas, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/979650.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Litwa
    drzewostany sosnowe
    sosna zwyczajna
    Pinus sylvestris
    trzebieze
    wzrost drzewostanu
    produkcyjnosc drzewostanow
    scots pine
    intermediate cuttings
    growth and yield
    long−term experiment
    Opis:
    One of the main tasks for the forest managers is to form the highly productive stands, and it is mainly performed by applying intermediate cuttings during the stand development. As the impact of thinning on the premature Scots pine, commercially most important species in Lithuania, has not been sufficiently investigated yet, our objective was to evaluate the impact of such treatments on the growth and yield of the pine stands by using data from the long term experimental plots. The described thinning experiment was established in 1983 in Kazlu˛ Ru−da (54.760395°N, 23.517736°E), in the 30−years−old Scots pine forest, growing in oligotrophic site conditions. Four square plots with the size of 0.25 ha each were set. The first one (5) was left as a control variant with no thinning, while the others were subjected to the treatments of different intensity. In variant 5A (slightly thinned) 15% of the basal area compared to the control plot was removed. Accordingly, in variant 5B (moderate thinning) 25% and in variant 5C (heavy thinning) 40% of basal area was subtracted. No additional thinning was implemented further during the experiment. Plots were re−measured at least 4 times with the last measurement in 2016, when the stand was 63 years old. The main result of this study was that after the 33 years no evident effect of various intensity of silvicultural treatments can be seen as the growth and yield of the un−thinned forest stand was the highest compared to the thinned ones. Growth and yield in the most intensely thinned stand reached 86 and 85% compared to the control variant, respectively. The best productive results were found for moderate thinning (92 and 89% of growth and yield of the un−thinned stand), while the worst – in the slightly thinned 5A variant (77 and 83% of values for the control stand). Further on, the number of trees and competition level in all plots were very different when the experiment was established. Yet after 33 years, these differences were remarkably reduced. Accordingly, the diameter distributions, being very different at the beginning of the experiment, eventually became very similar in all experimental plots. Finally, the results showed that in un− −thinned forest stand, natural mortality (self−thinning) of trees adjusted its density just in time. Thus this stand managed to keep its growing energy in later periods, avoiding degradation or destruction predicted by some theories.
    Źródło:
    Sylwan; 2019, 163, 09; 726-739
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model wzrostu modrzewia europejskiego (Larix decidua Mill.)
    Growth model for European larch [Larix decidua Mill.]
    Autorzy:
    Bruchwald, A.
    Zasada, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009318.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    dendrometria
    drzewa lesne
    modrzew europejski
    Larix decidua
    modele wzrostu
    modele stochastyczne
    drzewostany modrzewiowe
    struktura drzewostanu
    produkcyjnosc lasu
    growth and yield model
    european larch
    forest productivity
    stand structure
    Opis:
    The paper discusses the functioning scheme and components of the stochastic growth model for European larch. The model was presented in the form suitable for processing the periodic forest inventory data (diameter and height of trees measured on fixed sample plots and average stand age). The growth model for larch consists of four main algorithms: introductory, thinning, mortality and incremental. First, the introductory algorithm is run to determine stand characteristics at certain age. Next, the thinning algorithm linked with the mortality procedure is activated. In the next step, incremental algorithm (also coupled with mortality program) is turned on. Thinning and incremental programs are run alternately until the end of prognosis period is reached. One of the most important characteristics of forest stand structure is tree stocking utilized directly by the thinning algorithm. The presented model is suitable for prognosis of European larch stands with any age, site index, stocking and various results of measured diameters and heights. It requires verification based on independent empirical data, preferably from permanent research plots.
    Źródło:
    Sylwan; 2010, 154, 09; 615-624
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of growth performance of common bean (Phaseolus vulgaris L.) genotypes during two phenological phases
    Autorzy:
    Gebeyehu, Yeshiwas Sendekie
    Powiązania:
    https://bibliotekanauki.pl/articles/1059435.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Biomass yield
    Correlation and Growth parameters
    Phaseolus vulgaris
    Opis:
    Genotypic differences in biomass yield of many crops are mainly associated with variations in leaf area. Physiological growth analysis is the important in prediction of the performance of genotypes during plant growth. Therefore, the field experiment was conducted to study growth characteristics of common bean genotypes at Hawassa university agriculture research site. Three genotypes including Red Wolayita, Hawassa Deme and Ibado were evaluated in randomized complete block design with four replications during 2017 using irrigation. Growth analysis was done using primary data from two successive samplings in 20 days interval during linear vegetative growth stage and flowering stage. Growth parameters, specific leaf area (SLA), leaf area ratio (LAR), leaf area ratio (LAI), net assimilation rate (NAR), crop growth rate (CGR), relative growth rate (RGR) and biomass yield and their correlation were determined. The study result revealed that, Red Wollita had the highest specific leaf area (241.975 cm2 g-1) and leaf area ratio (161.36 cm2 g-1), Hawassa Deme had the highest net assimilation rate (27.5 mg dm-2 Day-1), leaf area index (1.35), relative growth rate (48.02 gg-1 day-1), average growth rate (0.1g day-1), crop growth rate (0.03g m-2 day-1) and biomass yield (2989.6 kg/ha). The ANOVA result indicated that, there was highly significant difference (p < 0.01) among genotypes for biomass yield. Correlation of major growth parameters with biomass yield was investigated. Biomass yield had positively highly correlated with net assimilation rate, absolute growth rate, relative growth rate and crop growth rate with correlation coefficient of (r = 0.39, 0.33, 0.42 and 0.56), respectively.
    Źródło:
    World Scientific News; 2019, 128, 2; 171-181
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of rootstock on leaf nutrient concentration and productive value of ‘Mutsu’ apple trees
    Autorzy:
    Sosna, I.
    Gudarowska, E.
    Spiak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192574.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    Malus domestica
    rootstock
    macro- and microelements
    growth
    yield
    Opis:
    Various apple rootstock genotypes may affect fruit tree nutrition. The plant nutritional status has a significant impact on the growth and yield of apple trees. The experiment was conducted in 2007-2015, at the Experimental Station in Samotwór near Wrocław, south-western Poland. During the nine-year study, the impact of different rootstocks (M.26, B.7-35, B.396, ARM 18, M.9, B.491, P 16, B.146 and PB-4) on the nutritional status, growth and yield of ‘Mutsu’ apple trees was investigated. Samples of leaves were collected for the analysis of macro– and microelements in the second half of July in 2009-2011. The study showed an ambiguous influence of rootstock on leaf macro-and microelement composition. This effect differed depending on a year. The results of the average content of the analysed components showed no effect of a rootstock on P, Mg, Mn and Zn concentrations in the leaves. M.26 rootstock resulted in the lower copper level (a significant difference when compared to B.7-35, M.9, B.146 and B.491). Trees on B.491, M.26 and B.7-35 rootstocks were worse stocked in boron than apple trees on ARM-18, M.9 and B.396. In comparison with stronger growing rootstocks, trees on PB-4 were characterised by the low content of calcium. Trees on B.7-35 rootstock grew the most, while the ones grafted on PB-4 showed the weakest growth and had the smallest fruits. The highest number of root suckers was observed for trees grafted on B.7-35 and ARM 18. Until the ninth year after planting, the largest yield was obtained from trees on B.396. In the present study, this rootstock proved to be the best for the ‘Mutsu’ cultivar
    Źródło:
    Journal of Elementology; 2020, 25, 4; 1581-1593
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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