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[1]ZHANG Qin,YU Enjiang,LIN Haibo,et al.Stability and Erodibility of Aggregate Affected by Different Continuous Green Manure Cultivations[J].Research of Soil and Water Conservation,2019,26(02):9-16.

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Stability and Erodibility of Aggregate Affected by Different Continuous Green Manure Cultivations

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 02 Page number: 9-16 Column: Public date: 2019-04-28

Title:: Stability and Erodibility of Aggregate Affected by Different Continuous Green Manure Cultivations

Author(s):: ZHANG Qin¹, YU Enjiang³, LIN Haibo², ZHANG Aihua¹, CHEN Zhenggang¹, ZHU Qing¹, CAO Weidong⁴, YAO Danjun¹; 1. Guizhou Institute of Soil and Fertilizer/Guizhou Institute of Agricultural Resources and Environment, GAAS/Scientific Observing and Experimental Station of Arable Land Conservation and Agriculture Environment(Guizhou), Ministry of Agriculture, Guiyang 550006, China;
2. Soil and Fertilizer Station of Guizhou, Guiyang 550003, China;
3. Guizhou University, Guiyang 550025, China;
4. Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China

Keywords:: soil aggregate; green manure; stability; erodibility

CLC:: S142;S152.4;S157

DOI:: -

Abstract:: To investigate the effects of continuous planting green manure on soil aggregate, five treatments including clean tillage, Vicia sativa L.， Raphanus sativus L.， Vicia cracca L., Vicia villosa Roth were chosen in this study. And the constituent, stability and erodibility under continuous planting green manure cultivation were examined. The results showed that the contents of mechanical-stable and water stable aggregate increased under green manure cultivation. The contents of >2 mm mechanical stable aggregate and >5 mm water stable aggregate were improved in Vicia sativus L. field. The contents of 0.25～2 mm mechanical-stable aggregate were improved in fields of Vicia villosa Roth and Vicia cracca L.. The contents of 0.25～5 mm water-stable aggregate were improved in field of Vicia cracca L.. Continuous planting cultivation of green manure was beneficial to the formation of water stable macroaggregate (>0.25 mm) and the increase of the contents of >5 mm soil water-stable aggregates, and has a prominent influence on the accumulation of big water-stable aggregates. The percentage of water-stable macroaggregate under the treatment of Vicia villosa Roth was highest. Raphanus sativus L. and Vicia villosa Roth were conducive to the promotion of mean weight diameter and geometric mean diameter of aggregate. Moreover, the percentage of aggregate destruction under green manure cultivation significantly decreased by 29%～38.17%. The percentage of aggregate destruction increased in the order: Vicia villosa Roth < Raphanus sativus L. < Vicia cracca L. < Vicia sativa L. The soil erodibility factor K under green manure cultivation has a certain influence and it shows that Raphanus sativus L. < Vicia villosa Roth < Vicia sativa L. < Vicia cracca L. Although the relation between soil erodibility factor K and green manure crop varieties was not significant, the relationship between soil erodibility factor K and soil aggregates was very close. The higher the water stable macroaggregate content was, the greater the mean weight diameter and geometric mean diameter was, the lower soil erodibility factor K and the percentage of aggregate destruction were, the better stability of the soil structure and erosion resistance were.

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