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黑龙江省果树冻害严重,对生产威胁很大。果树是多年生作物,冷害不仅影响当年产量,也影响以后几年的生育和结果。还会引起病虫危害,导致冻害、病害的恶性循环。这是造成我省苹果生产单产不高、总产不稳的主要原因。果树高接裁培法,经过长时间的研究和示范运用,对寒冷的自然条件适应力强,增产和收益都很显著,目前已有20余万株,栽培面积还在不断扩大。但是“高接”抗寒原因还不清楚。因此对同化产物和矿质营养在树体内的运输、分配和积累特点,“切口”接合处输送营养物质的截流作用等,进行探讨是很有必要的。
Fruit trees in Heilongjiang Province frost damage, a great threat to the production. Fruit trees are perennial crops, cold damage not only affects the current production, but also affect the fertility and results of the next few years. Will also cause pest damage, leading to frost damage, disease vicious circle. This is the main reason for the low yield and unstable output of apple production in our province. After a long period of research and demonstration, the fruit tree adapts to the natural conditions of the cold and its yield and income are significant. At present, there are more than 200,000 plants and the cultivation area is still expanding. However, “high access ” the cause of the cold is still not clear. Therefore, the assimilation products and mineral nutrition in the tree transport, distribution and accumulation characteristics, “cut ” junction delivery of nutrients cut-off effect, etc., to explore is necessary.