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KMID : 1025520110530010051
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Journal of Animal Science and Technology
2011 Volume.53 No. 1 p.51 ~ p.57
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Effect of Grass Filter Strips on NO3-N in Runoff from Forage Cropland
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Jo Nam-Chul
Kim Won-Ho
Seo S.
Yoon Sei-Hyung
Lee Ki-Won
Choi Ki-Choon
Jung Min-Woong
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Abstract
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The performance of grass filter strips(GFS) in abating NO3-N concentrations from the forage cropland was tested in an experiment on the 10% slope in Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration(RDA) from October 2007 to September 2009. Forage croplands with rye-corn double cropping system applied with chemical fertilizer and livestock manure(LM) were compared in a natural condition. The plots were hydrologically isolated in a randomized block layout of 3 treatments×2 factors×3 replicates. Main plots consisted of the length of GFS, such as 0m, 5m, 10m and 15m. Sub plots consisted of the type of LM, such as chemical fertilizer(CF), cattle manure(CM) and swine manure (SM). Dry matter yields of rye and corn increased significantly in order of CF>CM>SM(p<0.05). Concentrations of NO3-N in surface runoff water were reduced as the length of GFS increased. Especially, GFS with 10m and 15m reduced NO3-N concentrations significantly compared to that with 0m and 5m(p<0.05). The results from this study suggestthat GFS improved the removal and trapping of manure nutrients from forage croplands.
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KEYWORD
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Grass filter strips, Run-off, Manure, Forage, NO3-N
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