1.做好种子发芽试验。种子,特别是含水量大的种子,经一冬春贮存,发芽率要有一定变化,必须在晒种、选种的基础上,做好发芽试验,按其发芽率高低,确定播种量。 2.增施钾肥。玉米缺钾,从苗期6—7片叶开始,下位叶叶尖和叶缘出现“镶金边”的黄化或枯焦症状,植株生育受阻;生育中后期,下位叶全部枯萎披垂,失去生理功能,减产严重。我省缺钾地块较多,特别是沙性大的地块更要注意施用钾肥。一般每亩用硫酸钾10—12公斤,做口肥施用。 1. Good seed germination test. Seeds, especially seeds with large water content, are stored in a winter, the germination rate must have some changes, must be in the sun, seed selection on the basis of the germination test, according to the level of germination, to determine the sowing. 2. Increased potash. Corn potassium, starting from the 6-7 leaves of seedling stage, the lower tip and leaf margin edge of the “gold-rimmed” yellow or dry coke symptoms, plant growth retardation; fertility, lower leaves all withered drape, loss of physiology Function, cut serious. Potassium deficiency in our province more land, especially the sand of the larger land should pay more attention to the use of potash. General use of potassium sulfate per acre 10-12 kg, make mouth fat application.