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http://dx.doi.org/10.5338/KJEA.2010.29.4.343

Evaluation of Phosphorus Release Potential in Arable land with Different Landuse by Phosphorus Threshold  

Lee, Seul-Bi (National Academy of Agricultural Science, Rural Development Administration)
Lee, Chang-Hoon (Department of Crop Sciences, University of Illlionis)
Hong, Chang-Oh (Plant Science Department, South Dakota State University)
Lee, Yong-Bok (Institute of Agriculture and Life Sciences, Gyeongsang National University)
Kim, Pil-Joo (Institute of Agriculture and Life Sciences, Gyeongsang National University)
Publication Information
Korean Journal of Environmental Agriculture / v.29, no.4, 2010 , pp. 343-347 More about this Journal
Abstract
Heavy application of fertilizer and manure in excess from the optimum requirement for crop growth can increase phosphorus (P) accumulation and P release potential in soils. In this study, the relationship between soil test P and 0.01M $CaCl_2$ extractable P was analysed to evaluate the P release potential of agricultural soils under different land-use. The paddy, upland, plastic film house(PFH) soils were sampled from Tongyoung and Changnyeong, and Daegok areas in Gyeongnam province, respectively. With respect to the P accumulation, available P contents in upland and PFH soils were 619 and 796 mg $P_2O_5$/kg, respectively indicating that different land-use types can greatly impact soil P accumulation. As soil available P was increased in the paddy soil, the content of 0.01M $CaCl_2$ extractable P also linearly increased without change point. Comparatively, P threshold were detected at 520 mg $P_2O_5$/kg in both upland and PFH soils, indicating that P release potential were higher in these land-use systems. For reducing P release from agricultural soils, management of optimum P content is needed in soils possessing high P release potential. Further, the change point value, if it is to be used as an environmental indicator, requires more detailed investigation to cover a wide range of soil characteristics.
Keywords
Phosphorus accumulation; Phosphorus release; Threshold;
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Times Cited By KSCI : 1  (Citation Analysis)
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