朱砂李是我省李树优良品种之一。1977年我市渝水区河下园艺场于引种栽培34亩,1981年开始结果,1984年最高年总产1.2万余公斤。以后因管理粗放,病虫危害严重,致使树体老化,并有部分树相继死亡,至今保存不足30亩。自1985年以来,连继三年均未收果。1988年1月,我们与该场协商,签订了“朱砂李改造技术承包合同”。通过技术措施的实施,当年即恢复树冠,第二年少量挂果总产1100公斤,第三年即开始丰产,总产达1.5万公斤,超过历史年最高总产的20％,是技术承包计划产量的3倍,取得了较好的经济效益,现将改造主要措施介绍如下 Cinnabar Li Li is one of the province’s fine varieties. In 1977, the city Yushui River Horticultural Field in the introduction and cultivation of 34 acres, 1981 results, 1984, the highest total output of 12,000 kilograms. After extensive management, pests and diseases endanger the tree aging, and some trees have died, so far, less than 30 acres. Since 1985, the company has not even received fruit for three years. January 1988, we negotiated with the site, signed a “transformation of cinnabar contract technology contract.” Through the implementation of technical measures, the tree crown was rebuilt in the same year. In the second year, a small amount of fruiting bodies with a total output of 1,100 kilograms was produced in the third year. The total output reached 15,000 kilograms, more than 20% of the highest total annual output. Of the 3 times, and achieved good economic returns, the main measures are now introduced as follows