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[1]DONG Gui-qing,ZHANG Yang-an.Effect of Different Vegetation on Soil Nitrogen in Loess Hilly and Gully Area[J].Research of Soil and Water Conservation,2009,16(05):190-193.

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Effect of Different Vegetation on Soil Nitrogen in Loess Hilly and Gully Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 05 Page number: 190-193 Column: Public date: 2009-10-20

Title:: Effect of Different Vegetation on Soil Nitrogen in Loess Hilly and Gully Area

Author(s):: DONG Gui-qing¹, ZHANG Yang-an²; 1. Soil and Water Conservation Monitoring Station, Shangluo, Shaanxi 726000, China;
2. Yangling Vocational & Technical College, Yangling, Shaanxi 712100, China

Keywords:: Zhifang gully watershed; vegetation cover; soil nitrogen

CLC:: S153.61;X171.1

DOI:: -

Abstract:: The nitrogen content on three natural slopes in Zhifanggou watershed which is covered by different vegetation,were measured for revealing the nitrogen changes along these slopes.The results show that the change of the Alkali-hydrolyzable nitrogen is similar to total nitrogen and its basic change trend is: Robinia pseudoacacia>Caragana korshinski>Artemisia giraldi, however the change of total nitrogen is bigger than Alkali-hydrolyzable nitrogen.The content of nitrate nitrogen on the slope which is covered by Artemisia giraldⅡ is more than Robinia pseudoacacia and Caragana korshinski. Under the same condition of vegetation,the change of nitrate nitrogen and total nitrogen along the slope is the content on the foot of slope>the top of the slope>the middle of the slope.The change of ammonium nitrogen is not more obvious than the nitrate nitrogen and total nitrogen,and the difference among the slopes which are covered by different coverage is also not very obvious.At the same time from the variety of Robinia pseudoacacia the conclusion can be summarized that integrating of forest and grass can keep the nitrogen from runoff and raising the nitrogen enrich.

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