2010•Shenyang Nongye Daxue xuebaoRequires access
Effects of different fertilization on nitrogen accumulation characteristics of spring maize.
Xiumei Zhan, Zou Dian-bo, Xiaori Han, Ning Liu, Fei Cheng
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Abstract
A field trial was conducted to study nitrogen accumulation characteristics of spring maize under deferent N,P and K application rates.The results indicated that N accumulation pattern could be described by exponential equation.Under N,P2O5 and K2O application rates were 240,225 and 240kg·hm-2(treatments N2,P2,K2),the yield was 13725.5 kg·hm-2.N accumulation amount of spring maize was 3.504g.plant-1,the highest among all the treatments.The highest N nutrient absorption rate(HNAR) of N2 was 54.0 mg·day-1.plant-1,higher than the other treatments,and the time of HNAR in maize was earlier than the others.The transferred amounts of N was 1.477 g·plant-1 under the treatments of N2,P2 and K2,and the ratio in grains was 73.04%,the highest among all the treatments.Fitting N,P2O5 and K2O application rate not only stimulated the absorption and accumulation of N nutrient effectively,but also increased the ratio of N nutrient in grains,therefore the high yield of spring maize could be achieved.