[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 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:
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Research on Soil Nitrogen After Transplant in Haxi Forest of Qilian Mountains
- Author(s):
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PEI Wen1, CHE Zongxi1, LIU Xiande2, CHE Zongqi3, ZHANG Shan4, CHENG Caixia2, WEN Yali2
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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
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- Keywords:
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soil nitrogen; incubation method; elevation gradient; eastern Qilian Mountains
- CLC:
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S152.9
- DOI:
-
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- Abstract:
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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.