6月上中旬,一些地块的玉米叶片会出现黄白色的带状斑,个别植株叶脉间出现白色或透明的死斑,节间缩短,生长不良等现象.经营养诊断和喷肥试验查明,这是因缺锌或缺钾造成的,一般称之为玉米缺素症.造成玉米缺素症的根本原因是不施或少施农家肥.农家肥中含有作物生长所需要的全部营养元素. In mid-June, some yellowish-white banding spots appeared on maize leaves in some plots, white or transparent dead spots appeared between the veins of individual plants, the internodes shortened, and poor growth etc. The diagnosis of nutrition and the test of fertilization showed that, This is due to lack of zinc or potassium deficiency, generally referred to as corn deficiency syndrome caused by corn deficiency deficiency is the fundamental reason for not applying or less manure.Manual fertilizer contains all the nutrients needed for crop growth.