[1]Bai Hongying,Tang Keli,Zha Xuan,et al.Effect of Man-made Accelerated Erosion on Soil Degradation[J].Research of Soil and Water Conservation,1993,(01):44-49.
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Effect of Man-made Accelerated Erosion on Soil Degradation
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
Number of periods:
1993 01
Page number:
44-49
Column:
Public date:
1900-01-01
- Title:
- Effect of Man-made Accelerated Erosion on Soil Degradation
- CLC:
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- DOI:
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- Abstract:
- Influnce of man-made accelerated erosion of forest vegetation destroyed by human on soil degradation has been analysed in this paper,using data of simulated rainfall experiment and observated data of the large slope runoff plots,The results shows that soil loss of surface layer is 0.8cm/a caused by severe soil erosion,organicmatter loss 3～5%/a.available phosphorus loss 10%/a,in the first reclaimed year,soil nutrition loss occupies 20% of total amount of soil nutri-tion,Because soil nutrition losses with soil loss,nutrition in sediment is rich,available phospho-rus contents is j.4～3.4 times than that in soil.Soil porosity decreases, soil infltration decreases 60～70%,compared with forest land,Soil tempereture on reclaimed Lands is 10℃ higher than that of forest lands in summer,which results in increasing soil water loss and strengthing drought situation of crops.All this result in soil degradation and eco-environment worsening.
- References:
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[1] 史德明.保持水土拯救土壤.中国水土保持.1985(4)
[2] 中国科学院黄土高原综合科学考察队.黄上高原地区土壤侵蚀区域特征及其治理途径.中国科学技术出版社, 1990
[3] 唐克丽白然侵蚀与人为加速侵蚀初析.黄河流域环境演变与水沙运行规律会议论文集
[4] 鲁坤强.浅淡奈曼旗目然因素, 人为因素与沙摸化的祸根.中国水土保持, 1989(1)
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Last Update:
1900-01-01