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03 구두발표 : 구두발표(OA) - 농업환경 및 토양,수질 분야 ; OA-01 : 질소공급원으로써 요소와 큐라클로버를 이용한 프래어리코드 그라스의 바이오매스 생산
김성은 ( Sung Un Kim ),밴스오언스 ( Vance Owens ),케네스알버트 ( Kenneth Albrecht ),크레이그쉐퍼 ( Craig Sheaffer ),이도경 ( Do Kyoung Lee ),센틸슈브라메니언 ( Sen Subramanian ),홍창오 ( Chang Oh Hong ) 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Optimizing N input and proper N management is an important factor for establishing perennial biomass production systems. However, application of nitrogen (N) fertilizer can be one of the greatest expenses, from both a financial and environmental perspective. The objectives of this study were to determine if different nitrogen rates and planting spacing affected prairie cordgrass (Spartinapectinata Link) biomass yield and yield components in prairie cordgrass monoculture, and N fertilizer replacement value of kura clover (Trifoliumambiguum Bieb.) in prairie cordgrass and kura clover mixture compared to monoculture prairie cordgrass. Field plots were established at four environments in Illinois, Minnesota, South Dakota, and Wisconsin in 2010. Kura clover was transplanted on 30-cm centers in the field in all treatments in which it was a component. Prairie cordgrass seedlings were transplanted within the kura clover on 60, and 90-cm centers. Monoculture prairie cordgrass stands were established at the same population densities of mixed stands and fertilized with 0, 75, 150, or 225 kg urea N ha-1 to determine fertilizer N replacement value of the kura clover. Biomass at each location was harvested in the autumn from 2011 to 2013. N (urea), year, spacing and year x spacing affected prairie cordgrass production at all locations. Prairie cordgrass yield was increased with N application, and yield responses varied by location. Tiller density m-2 of prairie cordgrass tended to increase as N application increased and urea N fertilization affected PCG tiller mass. Yield of prairie cordgrass with 0 N were equal to or less than the yield of prairie cordgrass grown with kura clover at all locations in 2011 and 2012; however, there was a N value associated with prairie cordgrass grown with kura clover in 2013 and fertilizer nitrogen replacement value of kura clover ranged varied by location.