The nutritive mode in relation to the yield of two rowed winter barley
2000
Molnarova, J. | Kolinova, M. | Zembery, J. (Slovenska Polnohospodarska Univ. Nitra (Slovak Republic). Katedra Rastlinnej Vyroby)
The experiments focused on observation of fertilizing influence on the amount of yield, the amount of nutrients taken up by the yield and fertilization effectiveness were held in 1997-1998. They were held in clay brown soil in warm and middle dry climatic area. Fertilizing influence was observed on two varieties of two rowed winter barley (Monaco and Marinka) in four fertilizing variants (a) non-fertilized control, (b) - lowered dose of nitrogen without the base application of nitrogen in the autumn and with Microbion concentrate application, c variant - fertilization with regard to reserves of nutrients in soil, d - fertilization according to requirements for 5 tons of grain yield with the use of Unihum fertilizer. By barley yield the observed barley varieties took up the NPK-nutrients at the ratio 1 : 0.19 - 0.20 : 0.18, while 25.53 kg N, 5.36 kg P and 14.41 kg K were used per yield of one ton of grain and appropriate straw yield. Middle strong and strong correlations were discovered among taken up NPK nutrients, grain yield, straw and total above -ground phytomass (r = 0.5367+ to 0.9394++ by Monaco, r = 0.4075+ to 0.9694++ by Marinka). The highest yield (10 378 kg/ha) by Marinka and b variant took up the largest amount of nutrients from the soil (321.05 kg/ha). The fertilizing effectiveness (evaluated by the harvest index ZI-IIN) was lowest by d variant fertilized by full dose of nutrients regardless of their reserves in the soil. The values of the theoretical natural production (20.56 - 24.84 kg) were conditioned by fertilizing and variety. Fertilization caused decrease of values by 9.1% by Monaco and by 6.1% by Marinka. The difference between varieties in the terms of fertilizing variants reached 9.9 % to 13.4 % in favour of Monaco
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