Effect of Application level of Liquid Cattle Manure on the Run-Off Water and Soil Properties in Mixtures Swards

혼파초지에서 우분액비 시용수준이 유거수 및 토양특성에 미치는 영향

A manure management plan is important for all daily operations. This study was conducted to investigate the effect of application level of liquid cattle manure on the soil properties and changes of BOD and COD content in run-off water at the mixtures swards of National Livestock Research Institute RDA Suweon in 1995. The experiment was arranged in a randomized block design with five treatments consisting of no fertilizer chemical fertilizer application of 40, 60 and 80MT/ha as liquid cattle manure. The quantity of run-off for a no fertilizer was the highest of 1,469.4mm but that for a application level of liquid cattle manure of 60MT/ha was the lowest of 1,278.1mm. The change of BOD in run-off for a no fertilizer was the lowest of $19.84m{\ell}/{\;}{\ell}$, but that for a application level of liquid cattle manure of 80MT/ha was the highest of $36.22m{\ell}/{\;}{\ell}$. Change of COD in run-off for a no fertilizer was the lowest of $21.28m{\ell}/{\;}{\ell}$ but that for a application level of liquid cattle manure of 80MT/ha was the highest of $37.51m{\ell}/{\;}{\ell}$. Available phosphorus and total-N content of soil chemical properties was higher at liquid cattle manure than chemical fertilizer.

본 시험은 양축농가에서 환경오염으로 문제시되고 있는 우분뇨 액상구비를 혼파초지에 환원시 유거수내 BOD, COD 특성과 토양내 화학적 변화를 구명코자 축산기술연구소에서 무비구, 금비단용구, 우분뇨액비구(40, 60, 80톤/ha)를 두어 난괴법 5처리 3반복으로 시험한 결과는 다음과 같다. 무비구에서 유거수량이 1,469.4mm로 가장 많았으나 분뇨액비 60톤구에서는 1,278.1mm로 가장 적었다. 유거수내 BOD는 무비구에서 $19.84m{\ell}/{\;}{\ell}$로 가장 낮았으나 우분뇨 액비 수준이 증가함에 따라 높아지는 경향이었으며, 우분뇨액비 80톤구에서 $36.22m{\ell}/{\;}{\ell}$로 가장 높았다. 유거수내 CDO는 무비구에서 $21.28m{\ell}/{\;}{\ell}$로 가장 낮았으나 우분뇨 액비수준이 증가함에 따라 높아지는 경향이었으며, 우분뇨액비 80톤구에서 $37.51m{\ell}/{\;}{\ell}$로 가장 높았다. 토양의 화학성분중 유효인산 함량과 T-N은 금비구보다 우분뇨 액비 시용구에서 높게 나타났으나 우분뇨액비 수준간에는 차이가 적었다.