[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5187/JAST.2011.53.1.51

Effect of Grass Filter Strips on NO₃-N in Runoff from Forage Cropland

Jo, Nam-Chul (Grassland and Forages Division, National Institute of Animal Science, R. D. A.)
Kim, Won-Ho (Grassland and Forages Division, National Institute of Animal Science, R. D. A.)
Seo, Sung (Grassland and Forages Division, National Institute of Animal Science, R. D. A.)
Yoon, Sei-Hyung (Grassland and Forages Division, National Institute of Animal Science, R. D. A.)
Lee, Ki-Won (Grassland and Forages Division, National Institute of Animal Science, R. D. A.)
Choi, Ki-Choon (Grassland and Forages Division, National Institute of Animal Science, R. D. A.)
Jung, Min-Woong (Grassland and Forages Division, National Institute of Animal Science, R. D. A.)

Publication Information

Journal of Animal Science and Technology / v.53, no.1, 2011 , pp. 51-57 More about this Journal

Abstract

The performance of grass filter strips (GFS) in abating $NO_3$ -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 $\times$ 2 factors $\times$ 3 replicates. Main plots consisted of the length of GFS, such as 0 m, 5 m, 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 $NO_3$ -N in surface runoff water were reduced as the length of GFS increased. Especially, GFS with 10 m and 15m reduced $NO_3$ -N concentrations significantly compared to that with 0 m and 5 m (p<0.05). The results from this study suggest that GFS improved the removal and trapping of manure nutrients from forage croplands.

본 연구는 사료작물 재배지에 가축분뇨를 투입하여 사료작물의 생산성을 향상시키고 초지식생대를 설치함으로서 비점오염원의 저감 효과를 구명하기 위하여 수행되었다. 본 시험은 국립축산과학원 초지사료과 시험포장(천안)에서 경사가 약 $10^{\circ}$ 인 자연 경사지를 이용하여 2007년부터 2009년까지 3년간 수행하였다. 가축분뇨를 시용한 사료작물 재배지의 2년 동안 옥수수의 평균 건물수량은 화학비료구에서 24,716 kg/ha (100%), 우분퇴비구 20,497 kg/ha (83%), 돈분퇴비구에서 18,862 kg/ha (76%) 순으로 높았으며, 화학비료구에 비해 우분퇴비구와 돈분퇴비구에서 유의적인 수량감소가 나타났다(p<0.05). 호밀의 평균 건물수량은 화학비료구 11,870 kg/ha (100%), 우분퇴비구 10,650 kg/ha (90%) 돈분퇴비구 9,300 kg/ha (78%) 순으로 높았으며, 화학비료구에 비해 돈분퇴비구에서 유의적인 수량감소가 나타났으며(p<0.05), 우분퇴구에서는 유의적인 차이가 인정되지 않았다. 2년 동안 2009년도 옥수수의 건물수량은 2008년의 건물수량보다 약 24%의 수량 증가가 나타났으며, 호밀의 건물수량은 2008년에 비해 2009년에 약 80%의 수량 증가가 나타났다. 초지식생대의 설치에 따른 유거수 중의 평균 $NO_3$ -N 농도는 초지식생대의 길이가 0 m, 5 m, 10 m, 15 m로 길어질수록 $NO_3$ -N의 농도가 감소하였는데, 초지식생대를 설치하지 않은 0 m인 지점에 비해 10 m 및 15 m인 지점에서 유의적으로 감소하였다(p<0.05). 이상의 결과는 초지식생대를 사료작물 재배지에 10 m 이상 설치할 경우 초지식생대를 설치하지 않았을 때 보다 $NO_3$ -N의 유실량을 유의적으로 감소시킬 수 있음을 나타내었고, 초지식생대의 설치가 사료작물 재배지의 가축분뇨 시용에 따른 $NO_3$ -N의 수계유입 농도를 현저하게 줄일 수 있는 것으로 나타났다. 따라서 경사지에서 초지식생대의 설치는 가축분뇨를 시용한 사료작물 재배지에서 발생되는 $NO_3$ -N의 유실을 저감할 수 있을 것으로 사료된다.

Keywords

Grass filter strips; Run-off; Manure; Forage; $NO_3$ -N;

Citations & Related Records

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KSCI

Effect of Grass Filter Strips on NO3-N in Runoff from Forage Cropland 사료작물 재배지에서 초지식생대를 이용한 NO3-N 저감효과에 관한 연구

Effect of Grass Filter Strips on NO₃-N in Runoff from Forage Cropland