한국농공학회:학술대회논문집 (Proceedings of the Korean Society of Agricultural Engineers Conference)
- 한국농공학회 2000년도 학술발표회 발표논문집
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- Pages.623-628
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- 2000
수도재배에서 유입수의 농도와 시비량의 변화에 의한 질소, 인의 Mass Balance(지역환경 \circled3)
Mass balance of the phosphorus and nitrogen in variable input concentration and fertilization in cropping rice
초록
This study were conducted to evaluate the mass balance of phosphorus and nitrogen with cropping in experimental pot where the mass of input concentration, and fertilization were variable. Four treatments include CSWNF, TWCF, SWNF. And these cases were compared to the control case of tap water irrigation with conventional fertilization (CONTROL). Fertilization were following conventional fertilization , N : P : K = 11kg : 7kg : 8kg. Input water loading was CSWNF (N:48.7g ,P:3.6g), TWCF(7.8g, 0.6g), SWHF(38.8g ,2.9g), TWNF(38.8g, 2.9g ) and CONTROL(0g ,0g) The result is nitrogen decrease rate; TWCF(19.2%), SWHF(14.9%), CSWNF(9.2%) and SWCF(5.6%). phosphorous decrease rate ; TWCF (10%), SWHF(3.7%), SWCF(0.9%) and CSWNF(0.3%).
키워드