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[1]PEI Wen,CHE Zongxi,LIU Xiande,et al.Research on Soil Nitrogen After Transplant in Haxi Forest of Qilian Mountains[J].Research of Soil and Water Conservation,2017,24(04):349-354.

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Research on Soil Nitrogen After Transplant in Haxi Forest of Qilian Mountains

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 04 Page number: 349-354 Column: Public date: 2017-08-28

Title:: Research on Soil Nitrogen After Transplant in Haxi Forest of Qilian Mountains

Author(s):: PEI Wen¹, CHE Zongxi¹, LIU Xiande², CHE Zongqi³, ZHANG Shan⁴, CHENG Caixia², WEN Yali²; 1. Management Bureau in Qilian Mountains National Nature Reserve, Zhangye, Gansu 734000, China;
2. Academy of Water Resources Conservation Forest of Qilian Mountains, Zhangye, Gansu 734000, China;
3. Environmental Protection Bureau of Zhangye, Zhangye, Gansu 734000, China;
4. Gansu Agriculture University, Lanzhou 730070, China

Keywords:: soil nitrogen; incubation method; elevation gradient; eastern Qilian Mountains

CLC:: S152.9

DOI:: -

Abstract:: Study of the distribution characteristics of soil nitrogen at different elevations is a significant effect for reasonably utilizing forest resources and improving ecology function of forest. The soil nitrogen of Picea crassifolia forest at different elevations and the soil nitrogen of different vegetation types were studied by close-top incubation method. The results are summarized as follows. (1) The original contents of TN, NH₄⁺-N and NO₃^--N of soil in Picea crassifolia forest at elevation of 2 650 m are the lowest; nevertheless, they are the highest at elevation of 2 950 m. The contents of TN, NH₄⁺-N and NO₃^--N of soils in Picea crassifolia forests at different elevations decrease after the soils are incubated at primary position. (2) For the different vegetation types, the contents of TN, NH₄⁺-N and NO₃^--N of Picea crassifolia forest are the highest, but they are lower at shrubs and grassland in which the content differences are not significant. The contents of TN and NH₄⁺-N of soils in shrubs and grassland increase after the soils are incubated at primary position. The contents of NO₃^--N of soils in shrubs and grassland are stable. (3) The contents of TN, NH₄⁺-N and NO₃^--N of soil Picea crassifolia forest at a certain elevation are stable when they are moved to other elevation. But these contents of nitrogen significantly vary when soils are moved to different vegetation types. It shows that vegetation type is one of the most critical factors influencing soil nitrogen. The contents of soil nitrogen in different vegetation types are significantly different.

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