Effect of the Application of Sucrose on Rapid Decrease of Soil Inorganic Nitrogen

서지정보

· 발행기관 : 한국토양비료학회
· 수록지 정보 : 한국토양비료학회지(Korean Journal of Soil Science and Fertilizer) / 43권 / 4호 / 424 ~ 429페이지
· 저자명 : 구현회, 임우진, 이상은

초록

To solve the problems with excessive accumulation of soil inorganic N and resulting saline soils from overuse of nitrogen fertilizer, the effect of sucrose application on decrease of soil inorganic N content and electrical conductivity (EC) was studied. Sucrose treatment greatly reduced NH₄+-N content in soil. The amount of reduction was greater as the amount of sucrose treatment was increased. When NH₄ +-N content was reached the lowest point (about 10 mg kg-¹1or lower), the C/N ratio, which determines the amount of sucrose treatment, was around 10 regardless of initial NH₄+-N content. For the rate of NH4+-N reduction 15~36 hours was required to reduce the initial NH₄+-N content to half, and 36～69 hours to lower NH₄+-N content to the lowest point (about 10 mg kg-1or lower). In addition, sucrose treatment greatly lowered NO₃--N content. In case of C/N ratio above 10, initial NO₃--N content of 348 mg kg-¹ was reduced to the lowest of 14～21 mg kg-1. As for the rate of NO₃--N reduction by sucrose treatment, it took 36～60 hours for NO₃--N content to reach the lowest point for C/N ratio of 10 or higher, and it took 3 weeks, comparably longer time, for C/N ratio of 5. Lowering soil EC from sucrose treatment showed the same trend as NO₃--N content. As an important energy and carbon source for humankind, sugar should not be wasted and must be carefully applied to soil. In principle, the best way of preventing salt accumulation in soil is to optimize the fertilizer input. However, when over-fertilization should be dealt with, the sucrose treatment would be a possible and effective counter-measure to reduce overdosed nitrogen sources in soil.

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