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《Journal of Anhui Agricultural Sciences》 2008-19
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Effects of Different Nitrogen Applications on Grain Yield and Soil Fertility

XIANG Sheng-lan et al (Department of Geography,Key Laboratory of Geo-information Science of the Ministry of Education,East China Normal University,Shanghai 200062)  
[Objective]The research aimed to study the effects of different nitrogen applications on grain yield,nitrogen uptake and soil fertility.[Method] Based on the field experiments and analysis,the effects of N fertilizer on its grain yield,absorption contents of nitrogen and soil fertility were studied.[Result] The results indicated that the conventional fertilizer treatment and decrement treatment had insignificant difference on the grain yield(P0.05).The biomass of conventional fertilizer was higher than the latter but the seed rate was lower and the absorption content of nitrogen was higher than the latter.The soil total N content after planting changed a little then before.[Conclusion] Reducing the fertilizer rate would not influence soil subsequent productivity.
【Fund】: 国家自然科学重大基金项目(40131020);; 上海农业“四新”技术推广项目(沪农科准字(2003)-24-4)
【CateGory Index】: S511
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