대두의 도복과 근부특성과의 관계

Relationships between Lodging and Root Characteristics of Soy bean Plants

우리나라 대두도복의 원인을 구명하기 위하여 동일한 조건에서 재배한 25개 재래종 수집대두 및 장려품종을 대상으로 도복정도별 근부특성을 조사하였다. 1. 완전도복성 품종군에서는 태근의 수가 현저히 적었다. 2. 근건물중, 1차근수, 부정근수 및 지상부중/근중비율과 도복과는 뚜렷한 관련성이 없었다. 3. 지상부중/태근수 비율은 도복과 밀접한 관련이 있어 도복에 강한 품종일수록 태근당 지상부중이 가벼운 경향이었다.

The field experiment was carried out in order to find out the factors affecting lodging of Korean soybean varieties. Among the variety groups which were grown under the same cultural conditions, 25 Korean local varieties were selected by 5 lodging degree, and investigated their root characteristics in relation to lodging. The results obtained were as follows; There were no significant relationships between root dry weight, number of primary roots, number of adventitious roots and lodging. There also were no clear relationships between shoot/root weight ratio and lodging. However, it was recognized that the shoot weight/number of thick roots was highly related to soybean lodging. The susceptible varieties to lodging showed less shoot/thick root ratio.