四、缺锌症状叶片失绿,节间缩短,植株矮小。如:水稻的稻缩苗,玉米的花白苗或白化苗,番茄、青椒等茄果类蔬菜呈小叶丛生状,新叶发生黄斑,并向全叶扩展,还易感染病毒病,果树易出现小叶病。对锌敏感的作物主要有玉米、高粱、大豆、亚麻、洋葱、苹果、桃等。防治方法,一般多施用硫 Fourth, symptoms of zinc deficiency green leaves, internodes shortened, plant short. Such as: rice paddy seedlings, white corn seedlings or albino seedlings, tomatoes, green peppers and other solanaceous vegetables were lobular clusters of new macular, and extended to the whole leaf, but also susceptible to virus disease, prone to leaf defects disease. Zinc-sensitive crops are mainly corn, sorghum, soybeans, flax, onion, apples, peaches and so on. Prevention methods, the general application of sulfur