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http://dx.doi.org/10.7745/KJSSF.2012.45.5.725

Evaluation of Surface Covering Methods for Reducing Soil Loss of Highland Slope in Soybean Cultivation  

Lee, Jeong-Tae (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Lee, Gye-Jun (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Ryu, Jong-Soo (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Kim, Jeom-Soon (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Han, Kyung-Hwa (National Academy of Agricultural Science, RDA)
Zhang, Yong-Seon (National Academy of Agricultural Science, RDA)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.45, no.5, 2012 , pp. 725-732 More about this Journal
Abstract
There is relatively high vulnerability of soil erosion in slope highland agriculture due to a reclamation of mountain as well as low surface covering during early summer with high rainfall intensity. Especially, in soybean cultivation, soil disturbance by conventional tillage and exposure of topsoil at the early stage of soybean have intensified soil loss. The aim of this study was to evaluate various surface covering methods for reducing soil loss in highland soybean cultivation. The experiment was conducted in 17% sloped lysimeter ($2.5m{\times}13.4m$) with 8 treatments. Amount of runoff water and eroded soil, and soybean growth were investigated. Surface covering through sod culture and plant residue showed 3.4~45.0 runoff water amount with $177{\sim}2,375m^3\;ha^{-1}$ compared with control ($5,274m^3\;ha^{-1}$). And the amount of eroded soil was also reduced by 95% in surface covering treatment with $0.02{\sim}1.94Mg\;ha^{-1}$ than control with $40.72Mg\;ha^{-1}$. Yields of soybean pod showed $0.3Mg\;ha^{-1}$ in rye sod culture, $1.3Mg\;ha^{-1}$ in Ligularia fischeri var. spiciformis Nakai, $0.7Mg\;ha^{-1}$ in Aster koraiensis Nakai, $0.2Mg\;ha^{-1}$ in red clover and $2.0Mg\;ha^{-1}$ in non-covering, on the other hand, covering with cut rye showed $3.8Mg\;ha^{-1}$. Conclusively, covering the soil surface with cut rye were beneficial for reduction of soil loss without decreasing soybean yield in highland sloped fields.
Keywords
Covering method; Soybean; Soil loss; Runoff water; Highland;
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Times Cited By KSCI : 3  (Citation Analysis)
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