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[1]LIU Wujiang,ZHAO Yike,DUAN Qingsong,et al.Effects of Different Sowing Patterns of Herbs on Soil Aggregates Characteristics and Consolidating Soil Ability of Roots[J].Research of Soil and Water Conservation,2021,28(06):25-31.

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Effects of Different Sowing Patterns of Herbs on Soil Aggregates Characteristics and Consolidating Soil Ability of Roots

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 06 Page number: 25-31 Column: Public date: 2021-10-10

Title:: Effects of Different Sowing Patterns of Herbs on Soil Aggregates Characteristics and Consolidating Soil Ability of Roots

Author(s):: LIU Wujiang¹，ZHAO Yike²，DUAN Qingsong⁴，ZHANG Liyun³，YANG Yuanjun⁴，LIU Yufei⁴，XIONG Shoude¹，HE Guixiang⁵; (1.Yunnan Geological Engineering Survey and Design Institute，Kunming650041，China; 2.Kunming Land Development and Consolidation Center，Kunming650100，China; 3.College of Mechanical and Electrical Engineering，Yunnan Agricultural University，Kunming650201，China; 4.College of Water Conservancy，Yunnan Agricultural University，Kunming650201，China; 5.Dali Vocational and Technical College of Agriculture and Forestry，Dali，Yunnan671000，China)

Keywords:: different sowing patterns; herb; soil aggregate; soil consolidation ability

CLC:: S157.2; S152

DOI:: -

Abstract:: In order to clarify the relationship between soil aggregate characteristics and consolidating soil capacity of herbs under different sowing patterns，unconfined compressive strength tests were carried out in four treatments: plain soil，single sowing of Medicago sativa L.，single sowing of Setaria anceps Stapf ex Massey L. and mixed sowing of Medicago sativa L. and Setaria anceps Stapf ex Massey L. The results showed that:(1)planting herbs was conducive to the transformation from small aggregates to large aggregates，and mixed sowing was better than single sowing;(2)the results showed that the mechanical stability and water stability macro-aggregate content(R_0.25)of grass planting treatment were significantly higher than those of plain soil，and the fractal dimension(D_d)was the opposite(p<0.01); planting herbs could increase the content of macro-aggregate in soil，reduce the fractal dimension of soil，and mixed sowing was better than single sowing;(3)the mean weight diameter(MWD)，geometric mean diameter(GMD)and macro-aggregate content(R_0.25)were positively correlated with cohesion，while fractal dimension(D_d)was negatively correlated with cohesion; the fractal dimension(D_d)of different sowing patterns had the best correlation with cohesion，followed by(R_0.25); the fractal dimension(D_d)of mixed sowing had significant correlation with mechanical stability and water stability(p<0.01); mixed sowing changed the soil aggregate structure，and the fractal dimension had the greatest contribution to the soil cohesion. Planting herbs can increase the content of soil macroaggregates，reduce the fractal dimension of soil，and promote the consolidating soil ability of root system，and mixed sowing is better than single sowing.

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Last Update: 2021-10-10