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杨景洲是河北省昌黎县的劳动模范,他有梨树十八亩,二百多棵,大部分都是五十多年生的蜜梨和白梨(秋白梨);这种梨树寿命校长,八、九十年生,尚能结果。伹他的梨树是在瘠薄的山坡上生长着,因此树枝每年都要焦梢(树梢部枯死的枝梢,群众叫焦梢),影响梨树的结果很大。一九四三年他开始老树更新的工作.用修剪和施肥相结合的方法.把五十年生的梨树,逐年更新.经过七、八年的培养 提
Yang Jingzhou is a model worker in Changli County, Hebei Province. He has eighteen acres of pear trees and over 200 trees, most of which are pears and pears (autumn pear) that are over 50 years old. Eight or ninety years old, still able to result.伹 His pear tree grows on infertile hillsides, so the branches shoot every year (branches of tree branches are dead, crows are called coots), which has a great impact on pear trees. In 1943 he started the work of renewing old trees, using a combination of pruning and fertilizing, and renewing the pears aged 50 years from year to year after seven or eight years of cultivation