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在果树休眠期,将硫酸亚铁与有机肥料按比例混匀制成有机铁肥施入土壤和生长前期叶面喷洒复混铁肥液这两种方法,防治苹果黄叶病效果最佳。1 环施有机铁肥1.1 有机铁肥配制方法:将硫酸亚铁与优质腐熟的有机肥料,按1:15的比例混合均匀。配制时,先将硫酸亚铁溶液溶于10倍的水中,然后将硫酸亚铁喷洒在有机肥上,边喷边翻拌,使其充分混匀。1.2 施用方法及用量:先沿树冠外围挖环状沟,沟深50cm,宽60cm,然后
In the dormant period of fruit trees, the two methods of mixing ferrous sulfate and organic fertilizer in proportion to make organic iron fertilizer into the soil and spraying the mixed iron fertilizer solution on the foliage at the early growth stage are the best to control the yellow leaf disease of apple. 1 ring organic iron fertilizer 1.1 organic iron fertilizer preparation methods: the ferrous sulfate and high-quality decomposed organic fertilizer, according to the ratio of 1:15 mixed. Preparation, the first ferrous sulfate solution was dissolved in 10 times the water, and then ferrous sulfate sprayed on the organic fertilizer, while Spraying Flip, make it fully mixed. 1.2 Methods and dosage of application: first digging annular ditch along the periphery of the crown, ditch depth 50cm, width 60cm, and then