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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (27): 191-194.

所属专题： 水稻

• 农学 农业基础科学 • 上一篇    下一篇

高肥力土壤下氮素对水稻产量效应的影响

赵徳柱 王海龙 丁恒良 秦贵荣 陈兴位   

  • 收稿日期:2011-03-14 修回日期:2011-08-04 出版日期:2011-10-25 发布日期:2011-10-25

Effects of Nitrogen Application on Rice Yield in High Fertility Soil

  • Received:2011-03-14 Revised:2011-08-04 Online:2011-10-25 Published:2011-10-25

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摘要：

为了掌握不同施氮水平下氮素对水稻产量的贡献率，采用田间小区试验方法，对高肥力土壤条件下氮素对水稻产量的影响进行研究。结果表明，在高肥力土壤上水稻生物产量随着施氮量增加而增加，当施氮量小于105 kg/hm2时，水稻籽粒和秸秆产量同步增加；当施氮量大于105 kg/hm2时，秸秆产量呈快速增加，而籽粒产量呈下降趋势。随着施氮量的增加，每增加1 kg氮素投入所带来的作物生物产量和籽粒产量的增加量均呈下降趋势，但是籽粒下降幅度明显大于生物产量。

关键词: 酿酒曲 柑橘 梨 复合发酵 影响, 酿酒曲 柑橘 梨 复合发酵 影响

Abstract:

Effects of nitrogen application on rice yield were studied in high fertility soil by using the field plot experiments at Nazhang Town, Malong County, Yunnan Province. The results indicated that the rice biomass production increased with nitrogen application rate in high fertility soil. When nitrogen application rate was less than 105 kg/hm2, the rice grain and straw output increased synchronously. When nitrogen application rate was greater than 105 kg/hm2, the straw increased rapidly in production, and grain yield decreased. With the increase of nitrogen application, the biomass and grain yields that generated by each additional 1 kg nitrogen input both decreased, and the grain yields decreased significantly greater than the biomass production.