[1]Wang Yanwu,Sun Haofeng,Yu Hui,et al.Comprehensive Evaluation of Soil Quality of Different Shrubs in Windy Desert Area of Minqin[J].Research of Soil and Water Conservation,2024,31(03):169-178,186.[doi:10.13869/j.cnki.rswc.2024.03.009]
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Comprehensive Evaluation of Soil Quality of Different Shrubs in Windy Desert Area of Minqin
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 03
Page number:
169-178,186
Column:
Public date:
2024-04-30
- Title:
- Comprehensive Evaluation of Soil Quality of Different Shrubs in Windy Desert Area of Minqin
- Keywords:
- windy desert area; shrubbery; soil quality assessment; PCA
- CLC:
- S714.6
- DOI:
- 10.13869/j.cnki.rswc.2024.03.009
- Abstract:
- [Objective] The aims of this study are to analyze the characteristics of soil nutrients and biological properties of shrubbery in windy desert area, and to quantitatively assess soil quality of different sand-fixation shrubs, which is crucial for selecting the sand-fixation shrub species and guiding the ecological restoration. [Methods] The 5 sand-fixation shrub species(Nitraria tangutorum Bobr., Reaumuria songarica (Pall.)Maxim., Calligonum mongolicum Turcz., Ephedra przewalskii Stapf and Limonium aureum (L.)Hill.)in windy desert area of minqin were selected as the samples. The bare sandy land was set as the control, and the soil nutrient, microbial quantity and enzyme activity of 5 sand-fixation shrubs were measured and analyzed. At last the improving effects of 5 sand-fixation shrubs on soil quality were quantitatively evaluated by using principal component analysis and soil quality index. [Results](1)For 5 sand-fixation shrubs, the contents of soil organic matter and nitrogen were low, phosphorus was deficient, potassium was high, and total salt concentration was too low. Compare with bare sandy land soil, the contents of soil organic matter, nitrogen, phosphorus and potassium, microbial quantity and enzyme activity increased. For different soil layers(0—20 cm, 20—40 cm and 40—60 cm), the soil nutrition contents of Reaumuria songarica (Pall.)Maxim. were the highest among all shrub species. The soil microbial quantity and enzyme activity varied among all sand-fixation shrubs.(2)With the increase of soil depth, soil nutrient content gradually decreased but no significant difference between the soil layers, and the changes of soil microbial quantity and enzyme activity were different.(3)There were close correlations among soil nutrients, salt, microorganism and enzyme activity, among which soil nutrients and microorganism achieved a very significant positive correlation(p<0.01).(4)The improvement effect of different sand-fixation shrubs on soil quality varied in different soil layers. The sequence of 5 comprehensive scores were Reaumuria songarica (Pall.)Maxim.>Nitraria tangutorum Bobr.>Limonium aureum (L.)Hill.>Calligonum mongolicum Turcz.>Ephedra przewalskii Stapf>bare sandy land and Reaumuria songarica (Pall.)Maxim.>Nitraria tangutorum Bobr.>Calligonum mongolicum Turcz.>Limonium aureum (L.)Hill.>Ephedra przewalskii Stapf>bare sandy land for 0—20 cm and 20—40 cm, 40—60 cm soil layers, respectively. [Conclusion] This study suggests that Reaumuria songarica (Pall.)Maxim. and Nitraria tangutorum Bobr. can best improve the soil quality in windy desert area of Minqin. Limonium aureum (L.)Hill. can improve the soil quality of topsoil rather than that of middle and below soil.
- References:
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Last Update:
2024-04-30