内蒙古自治区科尔沁区地处我国北方农牧交错带东段,属于典型大陆性季风气候,年均温6.4℃,≥10℃活动积温3184℃,无霜期150d 左右,多年平均降水399.1mm 左右。常年气候条件下,玉米制种于4月末5月初播种,正值春季地温低,雨水稀少,土壤含水量不足,影响了种子出苗和苗期发育。7月中旬至8月初的高温多雨易造成父本花粉发育不良,对授粉不利,影响母本结实。9月份的早霜冻又影响了种子成熟度,降低了种子芽率。为了克服不良气候因素对制种产量和品质的影响,2004年我们进行了玉米制种田地膜覆盖栽培技术的 Horqin District of Inner Mongolia Autonomous Region is located in the eastern section of the ecotone between agriculture and animal husbandry in northern China. It belongs to a typical continental monsoon climate with an annual average temperature of 6.4 ° C, an active accumulated temperature of 3184 ° C at ≥10 ° C and a frost-free period of about 150 days with an average annual precipitation of 399.1 mm. In perennial climates, maize seeds were planted at the end of April and early May, coinciding with low ground temperature, scarce rainfall and insufficient soil water content in spring, affecting seed germination and seedling development. High temperature and rainy rain in mid-July to early August can easily cause pollen dysplasia in male parents, which is detrimental to pollination and affects the maternal fruiting. Early frost in September affected seed maturity and reduced seed germination. In order to overcome the impact of bad climate factors on the yield and quality of seed production, in 2004 we carried out the cultivation of corn covering plastic film