Effect of Orychophragmus violaceus incorporation on nitrogen uptake in succeeding maize

文献类型： 外文期刊

第一作者： Yang, L.

作者： Yang, L.;Cao, W.;Gao, S.;Chang, D.;Cao, W.;Bai, J.;Thorup-Kristensen, K.

作者机构：

关键词： green manure;nitrogen sources;Zea mays L.;cover crops

期刊名称：PLANT SOIL AND ENVIRONMENT （ 影响因子：1.799； 五年影响因子：2.169 ）

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收录情况： SCI

摘要： Winter Orychophragmus violaceus (OV)/spring maize is a novel eco-agricultural system in North China Plain, but little is known about OV's nitrogen (N) effects on succeeding maize growth and its contribution to maize N uptake and utilization during the growth. A pot experiment using N-15 was conducted, including five treatments: (1) Control without OV incorporation and N fertilizer; (2) G - high N-15 labelled-OV incorporation; (3) 50%G lower N-15 labelled-OV incorporation; (4) F - N-15 labelled urea fertilizer merely; (5) G + F high OV incorporation combined with urea fertilizer. Increasing OV incorporation rate increased maize dry matter, yield, and total N uptake. Approximately 84-97% of the released OV's nitrogen was absorbed before the V8 (the 8th leaf fully expanded) stage in G and 50%G treatments. However, only 19% of the released OV's nitrogen was taken up at this period in G + F, and the rest was absorbed from V8 to maturity. G treated maize doubled the OV's nitrogen uptake than the 50%G at maturity, and also had higher percentage contribution of OV's N to total N accumulation. The G and 50%G maize obtained similar OV's nitrogen use efficiency of 30%; however, this efficiency was further improved to 43% in the G + F. And more, G + F treatment further improved the maize yield by 9% compared to F treatments.

分类号： S

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