Influence of defferent organic mineral fertilization on the yield structure and on changes of soil properties
2002
Vrkoc, F. | Vach, M. | Veleta, V. | Kosner, J. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
The monitoring was carried on in the years 1996-2000 in field trial running since 1983 in Lukavec, (south-eastern Bohemia). In the field trials there were introduced different organic fertilizations and graduate N doses. According to the complex diffusion analysis, statistically significant for the yields of winter wheat after potatoes was the impact of N fertilization, years, and double interactions, with the exception of different organic fertilization. The N-doses up to 120 kg/ha after potatoes proved to be optimal from the viewpoint of winter wheat yields and quality. The situation was similar for winter barley. The results of diffusion analysis for individual years were analogical also in straw yields of both cereals. The highest N dose to potatoes (200 kg/ha) resulted in the highest tuber yields, but the starch content was significantly lower. Graduated N doses increased in cereals the numbers of ears per square m, but the mass of 1000 grains mostly decreased. In addition, N content in grain and straw increased with N doses, while pH annually decreased by 0.1 to 0.4. Maximum levels of crop growing profitability were obtained with those doses of fertilizers with which also an equilibrated balance of nutrients was obtained.
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