| Mineral N accumulation and distri bution of apple orchard soil on the Weibei dryland |
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| DOI：10.7606/j.issn.1000-7601.2008.03.32 |
| Key Words: Weibei dryland apple orchard mineral N accumulation and distribution |
| Author Name | Affiliation | | RAN Wei | College of Resources and Environment Northwest A ＆ F University, Yangling, Shanxi 712100,China | | XIE Yongsheng | Institute of Soil and Water Conservation Chinese Academy of Sciences and the Ministry of Water Resources, Yangling, Shanxi 712100,China；Xi’an University of Technology, Xi’an, Shaanxi 710048,China | | HAO Mingde | Institute of Soil and Water Conservation Chinese Academy of Sciences and the Ministry of Water Resources, Yangling, Shanxi 712100,China |
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| Abstract: |
| The content of NO3-N and NH+4-N was deter mined in the soil profile of 6to 37 age apple orchard on the Weibei dryland. The results showed that the content and distribution of NH+4-N maintain relatively stablein the depths of 0～400 cm soil profile with different planting years. The content and distribution of nitrate nitrogen varied significantly and the content of nitrate nitrogen was 0．31～195．32mg／kg ．The accumulation of nitrate nitrogenincreased significantly which was locatedin 40～260cm depths and the maximum nitrate N content was 195．32mg／kg in 100～120 cm depths of 15 age orchard．Large accumulation of nitrate N in the soil profile might lead to potential environmental pollution． |
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