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105kg/hm2时,水稻籽粒和秸秆产量同步增加;当施氮量大于105kg/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1kg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。
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/hm 2,the rice grain and straw output increased synchronously.When nitrogen application rate was greater than 105 kg/hm 2,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.
出处
《中国农学通报》
CSCD
北大核心
2011年第27期191-194,共4页
Chinese Agricultural Science Bulletin
基金
测土配方施肥项目"马龙县测土配方施肥政府补贴项目"
关键词
高肥力土壤
氮素
水稻产量
high fertility soil
nitrogen application
rice yield
