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[1]CHEN Xue,SONG Yali,WANG Keqin.Effect of Contour Reverse-Slope Terrace Measures on Soil Water Storage in Sloping Farmland of Red Soil in Central Yunnan Province[J].Research of Soil and Water Conservation,2019,26(06):92-99.

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Effect of Contour Reverse-Slope Terrace Measures on Soil Water Storage in Sloping Farmland of Red Soil in Central Yunnan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 06 Page number: 92-99 Column: Public date: 2019-10-17

Title:: Effect of Contour Reverse-Slope Terrace Measures on Soil Water Storage in Sloping Farmland of Red Soil in Central Yunnan Province

Author(s):: CHEN Xue, SONG Yali, WANG Keqin; College of Ecology and Soil & Water Conservation, Southwest Forestry University, Kunming 650224, China

Keywords:: contour reverse-slope terrace; slope farmland; soil water storage; water conservation capacity

CLC:: S152.7

DOI:: -

Abstract:: In order to explore the characteristics of soil moisture driving under contour reverse-slope terrace, reveal its water conservation ability, the small watershed of Yi Songhuaba Dam in northern suburb of Kunming in central Yunnan was selected as a research area in this study. By means of field monitoring and indoor test analysis, the spatial and temporal variation characteristics of soil water storage at different soil depths (0-100 cm) from May 1st, 2017 to April 30th, 2018 and their relationship with other physical properties were analyzed. The results showed that:(1) during the experiment, the amounts of rainfall in rainy season and dry season were 528.5 mm and 41.5 mm, respectively, accounting for 92.7% and 7.3% of the annual rainfall in the experiment. I₃₀(maximum 30 minutes rain intensity) was consistent with the overall change trend of rainfall; (2) under contour reverse-slope terrace, the average soil water storage in each soil layer increased by 9.6%~13.5% and 10.0%~23.9%, respectively, compared with the original sloping farmland in rainy season and dry season; (3) the variation coefficient of soil water storage in sloping farmlands under contour reverse-slope terrace decreased significantly (p<0.05), the variation coefficient of soil water storage in different soil depths decreased in the order:20 cm > 40 cm > 60 cm > 80 cm > 100 cm; (4) soil water storage decreased significantly with the increase of soil depth, and the influence of contour reverse-slope terrace on soil water storage in sloping farmland decreased in the sequence:40 cm > 20 cm > 60 cm > 80 cm > 100 cm; (5) the effect of the interaction of contour reverse-slope terrace treatment and different soil depths on soil water storage was significant, and the sum of squares of the modified model reached 48 149.124. In conclusion, the treatment of contour reverse-slope terrace had the significant effect on the soil water storage capacity, which played an important role in promoting the surface runoff interception, increasing water infiltration and reducing soil loss.

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