본 연구는 사료작물 재배지에 가축분뇨를 시용한 사료작물 재배지에서 초지식생대를 설치에 따른 -P와 토양 유실 저감 효과를 구명하기 위하여 수행되었다. 본 시험은 국립축산과학원 초지사료과 시험포장(천안)에서 경사가 약 10%에서 인 자연 경사지를 이용하여 2007년부터 2009년까지 3년간 수행하였다. 가축분뇨 시용은 화학비료, 우분퇴비 및 돈분퇴비를 시용하였으며, 초지식생대의 길이는 5 m, 10 m 및 15 m의 길이로 설치하였다. 초지식생대 길이에

The performance of grass filter strips (GFS) in abating P04-P 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 Main plots consisted of the length of GFS, such as Om, 5m, 10m and 15m. Sub plots consisted of the type of LM, such as chemical fertilizer (CF), composted cattle manure (CCM) and composted swine manure (CSM). Concentrations of P04-P in surface runoff water were reduced as the length of GFS increased. Especially, GFS with 10m and 15m reduced PO4-P concentrations significantly compared to that with Om and 5m (p<0.05). The results from this study suggest that GFS improved the removal and trapping PO4-P from forage croplands.