江苏沿海地区种植的夏花生,在6、7月份常出现不同程度的缺铁症,致使单株结荚率降低35%左右,出仁率降低10%左右,种仁产量降低40%以上,严重者造成颗粒无收。我们自1981至1983年连续三年进行了诊断和防治试验,取得了较为满意的效果,一般可减少种仁产量损失的85%左右。现将诊断原其防治方法简述于下;一、缺铁症状花生缺铁初期,心叶以下的1—3片复叶叶肉部分明显失绿,且失绿均匀,但叶脉仍为绿色。严重时叶 The summer peanut planted in the coastal area of ​​Jiangsu Province often showed different degrees of iron deficiency disease in June and July, resulting in a reduction of pod rate of about 35%, a decrease of about 10% of kernel rate and a decrease of more than 40% of kernel yield, Caused by the crop failure. We have carried out the diagnosis and control tests for three consecutive years from 1981 to 1983 and achieved satisfactory results. Generally, we can reduce about 85% of the yield loss of seed kernels. Now the diagnosis of the original prevention and treatment methods outlined below; First, iron deficiency symptoms peanuts early iron deficiency, the heart of the following 1-3 pieces of complex leaf mesophyll green significantly, and lost green uniform, but the vein is still green. Severe leaves