林县是一个核桃老产区,全县共有核桃树75万株,其中结果大树20万株,过去均为粗放管理,不修剪.近几年由于实行科学管理,对大树进行更新复壮修剪,核桃产量和品质显著提高.例如本县任村公社有8万株核桃结果树,自1977年推广科学管理以来,每年修剪2～3万株,产量由40万斤提高到60万斤.该公社桑耳庄大队有一株老核桃树,树势衰弱,大部分枝条干枯死亡,产 Lin County is an old walnut production area, the county a total of 750,000 walnut trees, of which 200,000 trees result in the past are extensive management, not pruning. In recent years due to the implementation of scientific management, the tree renewal rejuvenation pruning , Walnut yield and quality significantly increased.For example, the county Rencun commune has 80,000 walnut fruit tree since the promotion of scientific management in 1977, the annual pruning of 2 to 30,000, the output increased from 40 kg to 60 kg. Commune Sang Er Zhuang Brigade has an old walnut trees, trees weak, most of the branches died of death, production