我省主要绿肥推广品种光叶紫花苕前期生长缓慢,成熟期迟,造成收种与大春作物栽插播种的矛盾,雨季收种易造成霉坏损失。云南省农科院土肥所绿肥组针对这一问题,从1974年开始,建立株行观察及品比试验区,先后选育出三个优良单株:“74—2”、“75—13“和“79—13”。通过小面积繁殖和省内区试,又结合全国苕子品种资源鉴 In our province, the main varieties of green manure promoted the slow growth of the early stage and the later maturity, resulting in the contradiction of planting and planting of the spring crops. Yunnan Academy of Agricultural Sciences soil manure green manure group to address this issue, from 1974 onwards, the establishment of line observation and the ratio of test area, has bred three excellent plants: “74-2”, “75-13 ”And“ 79-13 ”. Through a small area of ​​breeding and the provincial district test, combined with the national razor breed resource Kam