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《Journal of Anhui Agricultural Sciences》 2010-21
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Migration Law of Nitrogen in Vegetable Soil in Xian under Rainfall Condition

TANG Bo(Shaanxi University of Technology,Hanzhong,Shaanxi 723001)  
[Objective] The purpose was to study the migration and transformation law of nitrogen element in vegetable soil in Xi'an City under rainfall condition.[Method] The self-made simulated rainfall equipment was used and the migration law of N in soil under rainfall condition was studied through indoor simulated experiment.[Result] After each rainfall,the N content in soil at each depth was higher than their background values;the change of N content in soil showed obvious 2 stages of sharp change and slow change.The high values of N content in soil all occurred in the soil layer at depth of 10-20 cm and their lowest values all occurred in the soil layer at depth of 60-70 cm,the depths of 10 and 60 cm were salient points of N content change in soil under rainfall condition;as the rainfall times were increased,both of the 2 salient points showed trend of moving downward.In the soil deeper than 20 cm,after 3 rainfalls,the N contents in soil at the same depth were as follows:N第1次N第2次N第3次.In the soil layer at the depth of 60 cm,after each rainfall,the N content in soil reached lowest value which was about 730 μg/g.[Conclusion] This study provided basis for reasonable application of N fertilizer.
【CateGory Index】: X53
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