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Evaluation of Phosphorus Release Potential in Arable land with Different Landuse by Phosphorus Threshold
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 Title & Authors
Evaluation of Phosphorus Release Potential in Arable land with Different Landuse by Phosphorus Threshold
Lee, Seul-Bi; Lee, Chang-Hoon; Hong, Chang-Oh; Lee, Yong-Bok; Kim, Pil-Joo;
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 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 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 /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 extractable P also linearly increased without change point. Comparatively, P threshold were detected at 520 mg /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;
 Language
Korean
 Cited by
1.
농경지 토양에 집적된 인산의 생물이용가능성 평가,이슬비;이창훈;김건엽;이종식;소규호;김상윤;김필주;

한국환경농학회지, 2012. vol.31. 4, pp.293-299 crossref(new window)
1.
Evaluation of Bioavailability of Phosphorus Accumulated in Arable Soils, Korean Journal of Environmental Agriculture, 2012, 31, 4, 293  crossref(new windwow)
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