保山市地处云南省西南部,属低纬度山地亚热带季风气候。蚕豆是当地小春季种植的主要作物之一。桑树是一种落叶树种,一年中采叶养蚕的季节不长,秋桑10月中旬采收结束,翌年清明前后萌发春芽,抽生新枝。利用桑树越冬阶段通风透光条件较好的有利条件,在空行间露地套种蔬菜、绿肥等作物,是提高桑园经济效益的重要措施。保山市是云南省一个蚕桑老产区,蚕桑产业发展迅速,仅隆阳区现有桑园3733hm2,桑园种植规模 Baoshan is located in southwestern Yunnan Province, is a low latitude mountain subtropical monsoon climate. Broad bean is one of the main crops grown in small local spring. Mulberry is a deciduous tree species, sericulture season is not long, the autumn harvest in mid-October the end of the year after the Ching Ming germination spring buds, new students. It is an important measure to improve the economic benefits of mulberry by taking advantage of the favorable conditions of ventilation and light during mulberry overwintering stage and intercalating crops such as vegetables and green manure in open rows. Baoshan is an old silkworm producing area in Yunnan Province. The sericulture industry is developing rapidly. Only the existing mulberry 3733hm2 in Longyang District and the planting scale of mulberry