The aim of this paper has been to evaluate yields and seed quality of winter oilseed rape depending on the plant density, foliar fertilisation with magnesium, sulphur, boron and Asahi growth biostimulant combined with constant NPK fertilisation. The research was performed in 2006-2008 as a two-factor field experiment. The first factor involved plant density (A -20, B -30, C -40 plants per 1 m 2 ) and the second one comprised fertilisation treatments (n = 7). Foliar fertilisation was applied once or twice. In rape seeds, the following were determined: the content of total nitrogen, content of fat and its fractions.The results show that the concentrations of total nitrogen and fat in rape seeds were significantly dependent on both the plant density and fertilisation. Significantly the highest content of those nutrients occurred after a double application of magnesium sulphate (VI), Solubor and Asahi biostimulant at the plant density of 40 and 30 plants m 2 , respectively. The composition of fatty acids extracted from seeds of the hybrid oilseed rape cultivar Nelson significantly depended only on fertilisation. The highest content of oleic acid and its increase, as compared with the control, was identified after a single application of magnesium sulphate (VI), Solubor and Asahi biostimulant. The fertilisation significantly decreased the value of the sum of polienic acids C 18:2 and C 18:3 in rape seeds against the control. It was only after a double application of magnesium sulphate (VI), microelement fertiliser (Solubor) and Asahi biostimulant that the accumulation of these fatty acids remained at the level of concentration reported in the control seeds.
An effective way to reduce nitric oxide emissions may be to reduce the level of nitrogen fertilization. Specialized formulations such as biostimulators are a good alternative to conventional mineral fertilization. The aim of the study was to determine the effect of the application of biostimulation agents (Asahi SL, Kelpak SL, Tytanit) applied against the limited dose of nitrogen (75 kgN·ha−1) on winter wheat ‘Muszelka’, their effect was measured on the parameters: grain yield, protein content, amount of chlorophyll and root mass. No statistically significant changes in yields were observed, but after application of the Asahi SL and Kelpak SL, considerably higher values were found as compared to the controls. It should be emphasised that the applied formulations significantly affected the root mass and chlorophyll content of the leaves. Especially in the case of roots of the plants where the biostimulator Asahi was used in the phase BBCH 37, Kelpak in BBCH 23 and fertilizer Tytanit in BBCH 37. And in the case of chlorophyll objects, where Tytanit was applied in BBCH 37 and 69. In the study, significant correlation was found only between the chlorophyll content and the root mass (r = 0.54).
The aim of the research was to assess the effect of long-term application of different doses of nitrogen fertilizers with or without manure to changes in the total organic carbon content, total nitrogen content, evaluation of dissolved organic carbon content and the value of absorbance coefficient (A 4/6 ) in sandy loam soil. The base of research was the long-term field experiment, established in 1979 at the Wierzchucinek Experimental Station close to Bydgoszcz city -Poland. The experiment was carried out in the three-course crop rotation, potato, rye, rye in randomized split-plot design. The experimental treatments were four levels of N fertilizers in 0, 47, 93, and 140 kg•ha -1•yr -1 (N 0 , N 1 , N 2 , N 3 ) as a 1 st factor of experiment, and the same doses of N fertilizers with farmyard manure application (30 t•ha -1 ) as a 2 nd factor. After 36 years of experiment the content of total organic carbon was 26% lower and the content of total nitrogen 13% higher compared to the values determined before the experiment foundation (1979). The consequence of changes in the content of organic carbon and total nitrogen, are changes in the ratio of organic carbon content and total nitrogen content. It was noticed that the use of manure and different nitrogen doses resulted in a decrease of organic carbon content and total nitrogen content value. After application of different nitrogen doses, organic carbon content ranged from 122.4 to 152.2 mg•kg -1 . The same nitrogen doses applied simultaneously with farmyard manure increased the organic carbon content, . The changes of the organic carbon content did not effect on percentage of this fraction in the total organic carbon. Percentage of organic carbon content in total organic carbon content was on averaged 1.6%. After the application of different nitrogen doses, humic acids of analyzed soils were characterized by lower average value of A 4/6 (5.4). However, the application of nitrogen doses with manure brought a higher -6.3 -A 4/6 value. Farmyard manure application caused the formation of humic acids of lower molecular weight and a low humification degree.Keywords: evaluation of dissolved organic carbon content, long-term experiment, manure, nitrogen doses, organic matter, total nitrogen content, total organic carbon content Streszczenie Celem pracy było zbadanie wpływu długookresowego nawożenia zróżnicowanymi dawkami azotu stosowanymi z obornikiem lub bez tego nawozu na zmiany zawartości ogólnego węgla organicznego (OWO), azotu ogółem (N og ), rozpuszczalnego węgla organicznego (RWO) w glebie oraz określenie wartości absorbancji (A 4/6 ). Podstawą badań było statyczne wieloletnie doświadczenie polowe, założona w 1979 roku w Stacji Badawczej w Wierzchucinku koło Bydgoszczy. Prowadzono je w trzyletnim, uproszczonym zmianowaniu: ziemniak -żyto ozime -żyto ozime. Pierwszym czynnikiem doświadczenia było zróżnicowane nawożenie azotem, dawki w kg•ha ). Po 36 latach stosowanego nawożenia średnie zawartości węgla oznaczone w próbkach glebowych były średnio niższe o 26%,...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.