李子缺硼症及其矫治技术刘翔，张美华（吉林省原种繁殖场）我场于１９８７年定植李子２００余株，主栽品种为吉林６号、北方一号和绥棱３号。土质为河淤土砂性土壤。１９９２年～１９９３年连续两年遭受严重干旱，致使１９９３年李子树出现严重缺硼症状，水果产量和质量显... Plum boron deficiency disorders and its correction technology Liu Xiang, Zhang Meihua (Jilin Province, the original breeding ground) I field in 1987, planting more than 200 strains of plums, the main cultivars for Jilin 6, No. 1 North and Suiling 3. Soil for the silt soil sandy soil. From 1992 to 1993, it suffered serious drought for two consecutive years, resulting in the serious lack of boron in plum trees in 1993, and the fruit yield and quality were obviously ...