돈분퇴비가 시용된 논의 양분유출 저감을 위한 저류지 효과 (Reduction of Pollutant Load by Small Pond in a Rice Paddy Applied with Pig Manure Compost)

서지정보

· 발행기관 : 유기성자원학회
· 수록지 정보 : 유기물자원화 / 22권 / 4호 / 21 ~ 27페이지
· 저자명 : 김민경, 김명현, 최순군, 조광진, 홍성창, 정구복, 소규호

초록

양돈분뇨의 처리는 환경문제 해결과 자원으로서 이용 등이 중요한 의미가 있다. 따라서 본 연구는 이두 가지 문제를 동시에 해결하고자 돈분퇴비가 시용된 논의 배수의 오염부하 저감을 위한 저류지 효과를 구명하고자 수행하였다. 경기도 수원시 권선구 서둔동 국립농업과학원 기후변화생태과 시험포장(1,715 m2)에서 배수로 말단에 논 저류지(12 m2)를 조성하였다. 2013년 5월부터 10월까지 영농기간동안 강우사상시 저류지 유입 전인 논 배출수와 저류지를 통과한 배출수의 토사 및 CODMn, T-N, T-P의 부하량을 평가하여 저류지의 효과를 평가하였다. 영농기간 동안 논 저류지를 이용한 논의 유출량은 67.8% 저감되었고 토사를 포함한 부유물질과 CODMn의 총 부하량은 각각 79.8%와 71.9% 저감되었다. 또한 T-N과 T-P의 총 부하량은 각각 73.6%와 74.9% 저감되었다. 따라서 경지기반 정리되어 가축분뇨 퇴․액비 시용이 용이한 논의 경우에는 외부 수계로 배출되기 전 저류지를 설치하면 영양염류의 배출이 저감될 것으로 생각된다.

영어초록

Pig slurry has been considered as environmental waste to be treated in an appropriate manner.
Moreover, water-born pollution loads by agricultural non-point source(NPS) pollution are expected to become intensified due to ongoing precipitation change. This study was conducted to develop a best management practice to reduce NPS pollution load by agricultural activity with pig manure compost. An eco-friendly way, small drainage pond, was suggested in this study to avoid direct drainage of agricultural runoffs and eventually reduce the amount of pollutants discharged into the surrounding aqua-environment. A small pond(12 m2) was constructed at the corner of a rice paddy field(1,715 m2) located in Suwon, Korea. Water was allowed to drain only via a small drainage pond. Sampling was repeatedly made at two locations, one from an entrance and the other from an exit of a pond, during the rice cultivation period(May to October, 2013). Generally, sampling was made only when runoff water drained through a pond, such as during and/or after rain(irrigation). The water quality analysis showed that all quality parameters(SS, CODMn, T-N, and T-P) were improved as water passed through the pond. The amount of runoff water was reduced by 67.8%. Suspended solids and CODMn concentrations were reduced by 79.8% and 71.9%, respectively. In case of T-N and T-P amounts, the reduction rates were 73.6% and 74.9%, respectively. Our data implies that agricultural NPS pollution from rice paddy fields with pig manure-based fertilizer can be effectively managed when an appropriate drainage water management practice is imposed.

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