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Effects of Slope and Fertilizer Application Method on the Behavior of Nitrogen in Saprolite Piled Highland  

Kim, Ki-Deog (National Institute of Highland Agriculture, RDA)
Ahn, Jae-Hoon (National Institute of Highland Agriculture, RDA)
Park, Kyung-Hoon (National Institute of Highland Agriculture, RDA)
Lee, Eung-Ho (National Institute of Highland Agriculture, RDA)
Park, Chol-soo (National Institute of Highland Agriculture, RDA)
Hwang, Seon-Woong (National Institute of Highland Agriculture, RDA)
Lee, Sang-Mo (National Instrumentation Center for Environmetal Management, SNU)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.39, no.5, 2006 , pp. 285-291 More about this Journal
Abstract
The lysimeter ($1.2m\;with{\times}1.6m\;length$) experiment using $^{15}N$ tracer method was conducted to investigate the influence of slopes (degree 5, 15 and 30%) and fertilizer application methods (solid application and fertigation) on the behavior of applied urea in saprolite piled highland with Chinese cabbage cultivation. NDFFs(nitrogen derived from fertilizer) in soil were increased with decreasing of degree of slope and of depth of soil. The recovery as percentage of fertilizer nitrogen by Chinese cabbage were 69.5% for solid application and 76.5% for fertigation in 5% slope, 65.0% for solid application and 70.2% for fertigation in 15% slope, and 56.1% for solid application and 62.3% for fertigation in 30% slope. There, fertigation will make great contributions to the reduction of environmental contamination by run off and to the increase of fertilizer efficiency in Chinese cabbage cultivated highland.
Keywords
Saprolite; Slope; Fertigation; $^{15}N$; Chinese cabbage; Highland;
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