潢川县地处淮南,长期实行稻麦两熟耕作制,由于土质粘重,在小麦播种前整地时,如遇阴雨连绵,土壤多形成大的土块,群众称为“铁蛋”,极不易整细、耙平,影响小麦播种和一播全苗。在这种情况下播种,出苗率仅40％左右。经过三年试验,通过采用播后灌水的方法,初步解决了小麦一播全苗。1984年在前两年试验的基础上,于水稻收获后,10月19日灭 Huangchuan County is located in Huainan, long-term implementation of rice and wheat double cropping system, due to soil sticky, before sowing in wheat before planting, in case of rain and rain, the soil form large soil, the masses called “iron egg” Not easy to fine, raking, affecting the planting of wheat and a broadcast of the whole plant. Seeding in this case, the emergence rate of only about 40%. After three years of experiment, through the use of post-broadcast irrigation method, a preliminary solution to a broadcast of wheat seedlings. On the basis of the first two years of tests in 1984, after the rice was harvested, it was extinguished on October 19