논문 상세보기
pp.220-225
콩을 연작해온 밭토양에 경명을 재배하므로써 토양선충밀도를 줄일 수 있으며 이것이 콩생육에 어떤 영향을 미치는가를 알기 위하여 콩단작구, 결명단작구, 콩-결명혼작구 및 간작구를 만들어 1년간 재배한 후 그 자리에 3년동안 콩을 재배하면서 선충밀도와 콩의 생육을 조사하엿다 1. 콩단작구에 비하여 결명혼작구 및 간작구에서 토양선충밀도는 크게 낮았고 결명단작구에서는 결명의 생육이 왕성해지면서 토양선충이 완전히 없어 졌다. 2. 결명단작구에 이듬해부터 콩을 계속 재배했어도 토양선충의 밀도는 아주 낮았고 결명혼작고 또는 간작구에 콩을 계속 재배하여도 3년차까지는 콩연작구보다 선충밀도가 훨씬 낮았다. 3. 결명의 뿌리에는 뿌리혹이 착생하지 않는것이 특징인데 콩과 결명을 혼작 또는 간작하여도 콩뿌리에 형성된 뿌리혹의 수는 콩단작구와 차이가 없었다. 4. 콩 성열기의 주당입수, 주당입수 및 주당입중은 결명과 혼작 또는 간작하여도 콩단작구와 차이가 없었다. 결명단작구, 혼작구 및 간작구의 뒷자리에 이듬해부터 콩을 재배한 결과 2년차까지는 콩연작구보다 생육이 더 좋았다.
Four cropping systems, soybean mono-cropping, Cassia tora mono-cropping, soybean-C. tora companion cropping and soybean-C. tora intercropping, were compared for number of soil nematodes and soybean growth in upland field in 1986. Soybean was cultivated as an after-crop of four different cropping systems from 1987 to 1989, and observations were continued. Soil nematode was not found in C. tora mono-cropping plot from mid growing season of C. tora while many nematodes were found in soybean mono-cropping plot in 1986. A few nematodes were found for 3 years in soybean field after one season cultivation of C. tora in 1986. Number of nematodes was lower in soybean-C. tora companion and inter-cropping plots compared with soybean mono-cropping, and was also lower for 3 years in soybean field after one season companion and inter-cropping culture in 1986 compared with continuous soybean cultivation plot. No root nodule was formed on C. tora root, but number of root nodules of soybean plant grown in C. tora companion and inter-cropping plots was not different with soybean mono-cropping plot. Number of pods. number of seeds and seed weight per soybean plant grown in C. tora companion and inter-cropping plots were almost same with soybean mono-cropping plot. When soybean was cultivated in field after one season C. tora mono, companion or inter-cropping, pod and seed number, and seed weight per plant were higher than continuous soybean cultivation field.
