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空怀树是指光开花不结果的旺树。主要是营养生长过旺,只要采取改造措施,抑制营养生长,调节光照、减缓树势、促进花芽分化等仍可使不结果的空怀树变成果实累累。四川省江安县义安村林果专业户姜林,他向生产队承包了两亩夏橙坡地共93株,树龄已有11年,其大多是空怀树。经他精心管理,1980年收果7000斤,平均株产果75斤,83年平均株产果207斤。他所采取的改造措施有以下几方面: 1.采取工程措施:①夏季断根。在树冠两侧的滴水线下,挖6—8寸深沟,切断部分根系,以削弱树势。九月在树冠滴水处挖露根群,晾晒半个月,直达叶片退绿、然后再覆土埋根;②9—10月对果树主枝基部环割1—3圈,以减缓树势,促花芽分化,同时喷施磷肥水2％;③拉枝,增大主枝张开角度。疏去内部徒长枝和密弱枝,使树通风透光,对树冠外围的
Empty Huai tree is the result of light flowering Wang tree. Mainly vegetative growth over, as long as the transformation measures to curb vegetative growth, regulate light, reduce the tree vigor and promote flower bud differentiation can still result in fruitless blank tree Huai. Jiang’an County, Sichuan Province, a village specializing in nuts Lin Jiang Lin, he contracted two acres of summer orange slope to the production team a total of 93 trees, the age has been 11 years, most of them are empty Huai tree. After his careful management, in 1980 the result of 7,000 pounds, the average yield of 75 pounds of fruit, 83-year average yield 207 pounds. He has taken the transformation measures in the following areas: 1. To take engineering measures: ① summer cut the root. In the drip line on both sides of the crown, dug 6-8 inch deep groove, cut off part of the root system to weaken the tree potential. In September the crown drip digging root groups, drying for half a month, until the leaves green, and then cover the ground; ② 9-10 months on the main branches of the ring cut 1-3 rings to ease the tree vigor, flower buds Differentiation, while spraying phosphate fertilizer water 2%; ③ pull branches, increasing the main branch open angle. To sparse internal branches and branches weak branches, the tree is ventilated, the crown of the periphery