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城固县桔园地区现有结果朱红桔树之中,40年生以上老树占一半以上,一般树冠衰退,近年来又受炭疽病危害,造成严重落叶和枝条枯死。1970年桔园公社约有30％的桔树除顶部残留绿枝绿叶外,其余一、二年生枝条均受害死亡,还有50％左右的桔树受不同程度的炭疽病危害。这些树不但不能结果,而且成为病虫繁生基地。为了迅速恢复树体健康,促进生长,提高产量,1971年4-7月在桔园公社开展了柑桔夏季更新修剪工作。实践表明,在加强肥水管理和病虫防治基础上,不同时期,不同程度修剪都能抽发大量新梢,枝叶旺盛,大大促进了树势恢复和产量提高。一、夏季修剪桔园公社广大贫下中农,深刻领会毛主席关于“人的正确思想,只能从社会实践中来”的伟大教导,认识到修剪是科学管理桔树的一项重要措施。1971年全公社夏剪桔树占大树总面
Citrus District, Chenggu County, the existing results Among vermilion trees, more than 40 years old trees accounted for more than half of the general decline of the crown, in recent years by anthrax hazards, causing severe deciduous and dead branches. In 1970, about 30% of the orange trees in the Orange Park commune were killed and the rest of the first and second year branches died, and about 50% of the orange trees were endangered by anthrax to varying degrees. These trees not only failed to fruition, but also became a base for pests and diseases. In order to promptly restore the health of the tree, promote growth and increase the yield, summer citrus summer pruning work was carried out in Orange Park from April to July 1971. Practice shows that on the basis of strengthening management of fertilizer and water and pest control, different stages and different degrees of pruning can extract a large number of new shoots with strong branches and leaves, which greatly promoted the restoration of tree vigor and yield increase. I. Summer Trimmings The vast majority of poor peasants and middle peasants in the Orange Park commune have a profound understanding of Chairman Mao’s great teaching on “people’s correct thinking can only come from social practice” and recognize that pruning is an important measure for the scientific management of orange trees. In 1971 the whole community summer cut orange trees accounted for the total tree