Effects of different nitrogen fertilization application methods on nitrogen utilization of spring maize
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Abstract:
To provide theoretical basic for rational fertilization in black soil area of Jilin Province, two years stationary field experiment was carried out to study the yield, nitrogen absorption and utilization of maize under different fertilization methods. The result showed that yield, biomass and nitrogen uptake of maize with increasing application of nitrogen fertilizer, increased 121.97% ~ 177.88%, 95.08% ~ 127.77%, 206.18% ~ 295.46%, respectively. The biomass and nitrogen accumulation of both one-time base application of nitrogen fertilizer (N1) and multiple application of nitrogen fertilizer (N2) were fastest-growing from V12 to R1. Compared to N1, the dry matter accumulation of N2 increased 30.18% and the nitrogen accumulation of N2 increased 105.53%. The contribution rate of nitrogen accumulation of N2 was 68.13% ~75.00%, which was significantly higher than N1. Comprehensive two years, compared to N, the yield, dry matter and nitrogen accumulation of N2 increased 7.60%, 4.56% and 3.19%, respectively. Nitrogen utilization rate, physiological utilization rate, partial productivity and agronomic efficiency of N1 increased 6.13%, 10.22%, 3.83% and 12.58%, respectively. Therefore, it ensured the nitrogen supply of maize after flowing, improved the efficiency of nitrogen applicaiton and increased maize yield of N2.
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