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[1]LI Cong-hui,ZHU Shou-jun,CHEN Yun-ming,et al.Effects of Biological Crusts on Soil Anti-erodibility in Loess Hilly Areas[J].Research of Soil and Water Conservation,2013,20(03):6-10.

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Effects of Biological Crusts on Soil Anti-erodibility in Loess Hilly Areas

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 03 Page number: 6-10 Column: Public date: 2013-06-28

Title:: Effects of Biological Crusts on Soil Anti-erodibility in Loess Hilly Areas

Author(s):: LI Cong-hui¹, ZHU Shou-jun¹, CHEN Yun-ming², YU Meng³, MA Xiao¹; 1. College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Xinjiang Lvjiangyuan Ecological Engineering Co., Ltd., Urumqi 830000, China

Keywords:: biological crust; soil anti-erodibility; soil disintegration; anti-shear strength

CLC:: S154;S157

DOI:: -

Abstract:: In order to study the effects of biological crusts forming in different development periods in loess hilly areas on soil anti-erodibility, the differences of soil disintegration and soil anti-shear strength under two different treatments, retention of biological crust and removal of biological crust were analyzed. The results were as followings:(1) the formation of biological crusts can reduce the soil disintegration quantity, with the development of biological crusts, the influence degree improved from 21.85% to 43.46%; (2) the formation of biological crusts can improve the anti-shear strength of soil at the rate of 17.91%~23.45%, and the development of biological crusts has the positive correlation with soil anti-shear strength; (3) soil disintegration quality had the negative linear correlation with soil anti-shear strength. As the biological crust can enhance the soil particle interaction, the effect of moisture on soil particle dispersion was reduced, which made the rate of change of soil disintegration to anti-shear strength reduced.

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