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http://dx.doi.org/10.5338/KJEA.2005.24.2.180

Effects of Sewage Irrigation on Rice Growth Condition in Paddy Soil  

Kim, Jong-Gu (Honam Agricultural Research Institute, NICS, RDA)
Lee, Kyeong-Bo (Honam Agricultural Research Institute, NICS, RDA)
Park, Chan-Won (Honam Agricultural Research Institute, NICS, RDA)
Lee, Deog-Bae (Honam Agricultural Research Institute, NICS, RDA)
Kim, Seong-Jo (College of Life and Natural Resources, Wonkwang University)
Publication Information
Korean Journal of Environmental Agriculture / v.24, no.2, 2005 , pp. 180-184 More about this Journal
Abstract
This study was peformed to assess environmental effect through rice culture with sewage irrigation using Iksan stream water from 2002 to 2003. Contents of $NH_4-N$ in irrigation water keep up one day at the tillering stage and panicle formation stage were decreased 40% and 52% respectively, but that of continued 4 days was decreased $88%{\sim}98%$. The $NH_4-N\;and\;NO_3-N$ in run off by reduction 50% fertilization were more decreased 17% and 44% respectively, than those of conventional fertilization level. Amount of K and $NO_3-N$ loss in infiltration water were more decreased 18% and 4% respectively, those of than conventional fertilization level. The Cu and Pb contents in soil of after experiment were slightly increased but other heavy metals were not accumulated. The rice yield by reduction 50% fertilization level was not significant compare with conventional fertilization level but head rice rate was increased.
Keywords
sewage irrigation; rice culture; soil properties;
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