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对黄河冲积性潮土上国光苹果缺铁失绿的年周期变化进行了研究,结果表明秋梢旺长期是发病高峰期、土壤pH高、有效铁低的植株表现缺铁失绿,矿质元素含量及叶内几种主要矿质元素间比率的年周期变化对缺铁失绿均有一定影响.
The annual cycle of iron deficiency chlorosis of Guoguang apple on alluvial alluvial soil in the Yellow River was studied. The results showed that the growth of autumn capitals was the peak in the long term. The soil pH was high and the available iron was low. And annual changes in the ratio of several major mineral elements in the leaves have some impact on the iron deficiency and chlorosis loss.