[1]Mu Ren,Sun Fei,Li Xinle,et al.Distribution and Enrichment Characteristics of Nutrients in Soil of Nitraria tangutorum Nebkhas at Different Succession Stages in the Ulanbuhe Desert[J].Research of Soil and Water Conservation,2024,31(03):195-203.[doi:10.13869/j.cnki.rswc.2024.03.006]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 03
Page number:
195-203
Column:
Public date:
2024-04-30
- Title:
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Distribution and Enrichment Characteristics of Nutrients in Soil of Nitraria tangutorum Nebkhas at Different Succession Stages in the Ulanbuhe Desert
- Author(s):
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Mu Ren, Sun Fei, Li Xinle, Wang Danyang, An Jingyuan, Liu Yajing
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(Experimental Center of Desert Forestry, Chinese Academy of Forestry/Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station, Bayannaoer, Innner Mongolia 015200, China)
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- Keywords:
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desert; Nitraria tangutorum; vegetation succession; soil fertility; fertilizer island effect
- CLC:
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S793.9
- DOI:
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10.13869/j.cnki.rswc.2024.03.006
- Abstract:
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[Objective] The aims of this study are to explore the vertical distribution of soil nutrients in sand dunes of N. tangutorum nebkhas at different successional stages in the Ulanbuhe Desert, and to provide a scientific foundation for the stable growth of N.tangutorum shrubs in the region. [Methods] N. tangutorum nebkhas sand piles at different succession were selected stages as the research objects. Through preliminary vegetation investigation, based on the dead rate and coverage of the N. tangutorum shrub, it was divided into different succession stages, namely the development stage(dead rate 10%~30%, coverage 20%~40%), stable stage(dead rate<10%, coverage 40%~60%), and decline stage(dead rate>50%, coverage<20%). Three relatively independent N. tangutorum nebkhas sand piles were selected for each succession stage. The vegetation characteristics and soil nutrients in the inter dune area and on windward and leeward slopes of sand piles were investigated and determined, respectively. [Results] As the succession of the N. tangutorum shrub progresses, the height, crown length, and width of the N. tangutorum first increased and then decreased. Among them, the crown length in the stable stage was significantly higher than that in other stages(p<0.05), increased by 45.50% and 50.01% compared to the developmental and declining stages, respectively(p<0.05). At the leeward slope, the soil nutrient content during the development stage shows a ‘descending ascending descending' trend with the increase of soil depth, while the organic matter content during the stable and declining stages showed a decreasing trend, reaching the minimum value at 40—60 cm. At the windward slope, the content of soil organic matter and total nitrogen in 40—60 cm soil layer reached the maximum value in the decline stage with the development of the succession stage, but the content of total nitrogen in the development and decline stage reached the minimum value in 40—60 cm soil layer with the increase of the soil depth, which was 83.33% and 80.31% lower than that in 0—10 cm soil layer, respectively(p<0.05). The soil nutrients of the white thorn shrub sand pile at different slope positions reached their maximum values at 0—10 cm, but overall, the nutrient enrichment effect of the N. tangutorum nebkhas sand pile soil was not significant. [Conclusion] This research has shown that the soil nutrients in the N. tangutorum nebkhas sand pile are mainly concentrated on the surface of the sand pile. How to alleviate the activation of the N. tangutorum nebkhas sand pile and soil nutrient loss is an important guarantee for the stability of the N. tangutorum nebkhas sand pile in arid environments.