湖北沔阳县九合垸园艺场有120亩梨园,多数为砂梨,树龄5～18年生。过去大冠稀植(5×6米),管理粗放,产量低。1975年以后,由于加强了管理,总产量从1975年的1.3万斤,1982和1983年上升到36万斤和30万斤,好果率由70%上升到90%。具体办法是:1.加密和高接换种。将株行距改为5×3米,亩栽44株;棠梨、康德梨改接王 Hubei Jieyang Jiuhe embankment horticultural field has 120 acres of pear orchard, most of sand pear, tree age of 5 to 18 years. In the past, the crown was sparsely planted (5 × 6 m), extensive management and low yield. After 1975, due to the intensified management, the total output rose from 13,000 pounds in 1975 to 360,000 pounds and 300,000 pounds in 1982 and 1983, and the good fruit rate rose from 70% to 90%. The specific methods are: 1. Encryption and high exchange of species. The line spacing to 5 × 3 meters, 44 acres planted; Tongli, Kant, Pear then the king