초록
모시풀 재배에 있어서의 적정 시비량을 알고자 휴지재식 초년부터 성원이된 4년째까지 시험조사한 결과를 요약하면 다음과 같다. 1. 모시풀의 경신장에는 비료 3요소중 질소, 칼리의 증시효과가 컸고, 석회도 경신장에 크게 작용하는 것으로 생각되었다. 2. 기준시비량 $P_2O_5$-$K_2$O=9-3-9kg/10a에 비하여 질소는 2～3배, 칼리는 2배비 시용에서 수량이 증대되었고, 그 중 10a당 질소 18kg, 인산 3kg, 칼리 18kg와 석회 200kg 시용의 경우 가장 유효경 비율도 높았으며 조섬유 수량에서도 33% 증수되었다.
To determine the optimal application level of fertilizers, nitrogen, phosphate, potassium and lime in ramie(Beohmeria nivia Hooker et Arnot), the experiments were conducted for four years from seedling stage propagated by suckers to fully-grown stage under various comibinations of $N, P_2O_5, O$ and lime. Increasing in application rate of N and $K_2$O enhanced stem growth of ramie greatly, and it appeared that lime application also had large effect on increase of stem growth. Yield increased greatly by increasing of application rate with two or three times in N and two times in $K_2$O as much as the standard application rate of fertilizers N-$P_2O_5$-$K_2$O =9-3-9kg/l0a. Especially, treatment with 18kg N, 3kg $P_2O_5, $, 18kg $K_2$O and 200kg lime per l0a showed higher percentage of productive culm and increased yield of crude fiber about 33%. The variation among treatments was relatively small in stem length but larger in fresh weight of shoot and stem. The variation was large at early stage of experiment, that is, from one to two years after planting, but decreased progressively from three years after planting. There was no large difference in number of stems among application rates of fertilizers from three years after planting which was fully-grown stage. However, increasing in application rate of Nand $K_2$O twice as much as the standard rate had large effect on increasing the percentage of productive culm, and hence increased yield greatly.
