幼旺苹果树所以结果晚而少,一是由于营养枝直立生长较多,生长量大,对营养的竞争力强,不仅影响通风透光,而且抑制了花芽的形成;二是由于叶丛枝比例低,营养积累少,中、长枝比例高,营养消耗的多。山东省莱西县院里公社丁家庄大队有720棵这样的材,每年总产只有3万斤。应聘来当技术员的宋修金同志,于1978年冬至1979年春,逐棵将这些树的骨干枝上的延长枝实行中短截,余下的中、弱枝任 Young apple tree so the result is late and less, one is due to vegetative shoots upright more growth, large, strong competitiveness of nutrition, not only affect the ventilation and light, but also inhibited the formation of flower buds; the second is due to the leaves Congzhi The proportion of low, less accumulated nutrients, the proportion of long branches, high nutrition and more. Lacey County Hospital in Shandong Province Dingjiazhuang Brigade has 720 such material, annual output of only 3 kg. Comrade Song Xiujin, who applied to be a technician, applied the short and long sections of the extended branches on the main branches of trees by the trees in the spring of 1978 and the spring of 1979. The remaining branches of weak branches