경엽절제 정도에 따른 넓은잎큰조롱의 수량 및 품질을 구명하여 재배법 확립의 기초자료를 제공하고, 지주재배에 따른 경영비를 절감하고자 경엽절제 비율 10% 등 5처리를 두어 시험한 결과는 다음과 같다.
가. 지주재배(관행)에 비하여 무지주재배에서 경엽생육이 저조하였으며, 무지주재배 간에는 경엽 절제비율이 적을수록 줄기길이는 길었으나, 줄기굵기와 분지수는 절제비율이 많을수록 굵거나, 많은 경향이었다.
나. 엽폭은 경엽 절제비율이 적을수록 넓은 경향이었으나, 엽록소 함량은 경엽 절제비율이 많을수록 많은 경향이었다.
다. 근 생육은 지주재배에서 양호하였으며, 무지주재배에서의 상품수량은 경엽무절제 559 kg/10a 대비 경엽 10~20% 절제에서 9~13% 증수되었다.
라. 지주재배에 따른 경영비를 절감하기 위한 무지주재배시 최적 경엽절제비율은 20%이었다.
This experiment was carried out to get a basic information of yields and qualities as affected by 5 treatments including 10% cutting rate of branch-top with a view to reducing operating cost in the non-supporting cultivation system as an alternative of the staking cultivation system in Cynanchum auriculatum Royle ex Wight. The results were as followed; growth of branch-top by non-supporting culture seemed to be poor as compared to the staking one(conventional method). In non-supporting culture, lower rate of cutting of branch-top of the plants showed longer vine length, whereas higher rate of cutting resulted in thicker stem diameter and plenty of branch number. In view of leaf width in cutting rate of branch-top, the lower, the broader, but the chlorophyll content would be higher by increased rate of cutting of branch-top. Tuber growth seemed to be good in staking cultivation as compared to non-supporting cultivation. And marketable yield of no cutting of branch-top of the plants would be 559kg/10a, while 10~20% cutting rate of branch-top increased by 9~13% in non-supporting cultivation. The results obtained showed the optimal branch-top cutting ratio of non-supporting cultivation of which could be labor-saving farming technologies be 20% as an alternative of the staking cultivation system in Cynanchum auriculatum Royle ex Wight.