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Influence of Rice-soybean Rotation on Soil Chemical Properties and Crop Growth in Silt Loam Soil  

Lee, Deog-Bae (National Institute of Agricultural Science and Technology, RDA)
Yang, Chang-Hyu (Honam Agricultural Research Institute, NICS, RDA)
Ryu, Chul-Hyun (Honam Agricultural Research Institute, NICS, RDA)
Lee, Kyeong-Bo (Honam Agricultural Research Institute, NICS, RDA)
Kim, Byeong-Su (Honam Agricultural Research Institute, NICS, RDA)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.39, no.4, 2006 , pp. 209-213 More about this Journal
Abstract
This study was carried out to investigate the changes in soil chemical properties and yields of crops by rice-soybean rotation cropping system at silt loam soil. There were 4 rotation cropping systems; continuous rice cultivation, annual, biennial and triennial rotation of soybean and rice. There were little change in pH, organic matter, $Ca^{2+}$ and $K^+$ contents with decrease in available phosphate content in the continuous rice cropping. The cropping system of soybean-rice caused to increase in available $P_2O_5$, $K^+$ and $Ca^{2+}$ in the soil after harvest. Content of $NH_4-N$ in the soil also increased after the rotation of soybean than the continuous rice cropping in the soil during the rice growth period. These chemical change in the soil caused to increase rice growth in number of the panicles and the spikelet per square meter. The yield of rice was increased by the rotation with soybean, and was gradually increased in the triennial rotation of soybean and rice. But the yield of soybean was decreased in continuous cultivation for two or three years in the paddy field. It was recommended for annual rotation to prevent the yield of soybean from decrease.
Keywords
Paddy field; Rice; Rotation; Soybean;
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