Weed Occurrence as Influenced by Living Mulch, Soil Incorporation and Cutting Treatment of Rye in Organic Soybean Field

유기농 콩 재배에 가장 문제가 되는 잡초를 억제하기 위하여 호밀을 피복작물로 이용하여 콩을 재배하였다. 호밀의 이용방법에 따른 잡초 억제 효과를 보기 위하여 리빙멀치(living mulch), 토양 환원, 호밀 예취구를 두었고, 콩의 재식밀도와 호밀 파종밀도를 다르게 처리하여 잡초의 발생 양상을 비교하였다. 호밀을 리빙멀치로 이용한 처리구가 잡초의 발생과 생 육을 가장 효과적으로 억제하였다. 콩 파종 한달 후의 잡초 억제율은 리빙멀치구가 92.5%에 달하였으며 15일 예취구가 75.4%, 토양 환원구가 67.1%, 30일 예취구가 61.3%에 달하였다. 호밀의 파종 밀도에 따른 효과는 처리구간 차이가 미미하였으나 콩 생육 후기에는 호밀 2줄 파종이 호밀 1줄 파종보다 다소 우수하였다. 콩 재식거리에 따른 효과도 호밀 파종 밀도의 결과와 비슷하여 밀식과 소식간 차이가 인정되지 않았다. In organic agriculture, cover crops are used for weed control. Cover crops inhibited weed germination or growth by allelopathy or shading effects. In this study, we used rye as cover crop to control weed in organic soybean field. The main treatment was rye using method such as living mulch, incorporating and mowing. Sub-treatment was rye planting density and soybean planting density. One month after soybean sowing, weed emergency and growth had been highly suppressed by rye in all treatments. Living mulch treatment was the best effective way to control the weed about 92%, and mowing treatment was the second about 75% compare to control. The weed control efficiency between rye planting densities was similar during one month. Soybean planting density treatment was same result as rye planting density. As a result of this experiment, we recommend rye as living mulch in one row planting.