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根据果树生长的一般规律,在严冬来临前,均有一段越冬准备过程。如枝条停止生长,树叶脱落,落叶前叶中养分大量向枝干和根部转运、贮藏,以利越冬。但未进入结果期的苹果树,却往往到九、十月份枝条仍不停止生长,致使枝条养分积累差,组织不充实,越冬准备不良。加以我区冬春气温变化剧烈,骤冷骤热,风多风大,气候干燥,易使枝条失水,表皮皱缩。而此时根层土壤冻结,根系尚
According to the general law of the growth of fruit trees, before winter begins, there is a winter over preparation process. Such as the branches stop growing, leaves fall off, leaves a lot of nutrients in the leaves before the branches and roots transport, storage, in order to facilitate winter. But did not enter the fruit of the apple tree, but often until September and October still does not stop the growth of branches, resulting in poor accumulation of nutrients in branches, the organization is not full, poor preparation for the winter. To winter and spring in my area of intense temperature changes, rapid cold and hot, wind and windy, dry climate, easy to make the branches dehydration, skin shrinkage. At this time the root soil freezing, root system is still