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苹果树三佳施肥就是根据苹果根系年生长活动规律和在土壤中的分布状况来选择最佳施肥时机,确定最佳施肥深度,把握最佳施肥方法。三佳施肥是实现幼树早期丰产、盛果期树连年丰产优质的关键措施之一。一、选择最佳施肥时机苹果根系一年有3次生长吸收活动高峰期,分别在早春萌芽前后(3月下旬至4月中下旬)、春梢停长后(5月下旬至6月上中旬)和秋梢停长后(8月下旬至落叶),3次根系活动高峰期正是果树开花坐果、花芽分化与果实发育、树体贮藏养分需要大量营养元素的时期。施肥应根据树龄树势、结果状况等树体具体需要选择最佳施肥时机。①弱树、衰老树,施肥目的是促进枝叶生长,恢复树势,施肥应
Apple tree Sanjia fertilization is based on apple root growth activities in the law and distribution in the soil to choose the best timing of fertilization to determine the optimal depth of fertilizer to grasp the best method of fertilization. Sanjia Fertilizer is one of the key measures to achieve early seedling yield and fruit yield in successive years. First, the choice of the best timing of fertilizer apple root growth in three times a year the peak activity of absorption, respectively, before and after sprouting in early spring (late March to mid-April late), spring shoot long stop (late May to mid June ) And the autumn end of the long stop (late August to the deciduous), three root activity peak is fruiting blossom fruit, flower bud differentiation and fruit development, tree storage nutrients need a large number of nutrients during the period. Fertilization should be based on the age of trees, the results of the tree and other specific needs of the best choice of timing. ① weak trees, aging trees, the purpose of fertilization is to promote the growth of foliage, restore the tree vigor, fertilization should be