2012•Northern HorticultureRequires access
Effects of the Fertilization Measures on Spatial-temporal Dynamics of Soil Nitrogen
Tongke Zhao
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Abstract
According to the analysis of conventional fertilization pattern of farmers in Beijing's Yanqing,the effects of total nitrogen content,nitrate content and ammonium N in soil were studied.The results showed that optimized fertilization(Chemical nitrogen fertilizer for 120 kg/hm2,phosphatic fertilizer for 90 kg/hm2,potash fertilizer for 135 kg/hm2,organic fertilizer for 7 500 kg/hm2)may improve soil total nitrogen content.Optimized fertilization could reduce the nitrate nitrogen content in soil and prevent its downward leaching than conventional fertilization.In addition,there was a relationship among soil ammonium N in soil and different nitrogen applications and time.