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平泉县是1989年被农业部确定的杂交玉米种子生产基地,年制种面积5万亩左右,产种2000万公斤上下,承担着全国五大玉米产区300多个地县用户每年用种生产任务。无霜期90～140天,年≥10℃有效积温2300～3400℃,年平均降雨量540毫米(80%集中在作物生长季节)。全县71.3万亩耕地分布在海拔335～1000米的21个大川156条长沟内。充足的光照,较大的日温差,交错的山岭,纵横的沟川所形成的独特自然隔离条件,非常适合杂交玉米制种。我们依据当地生产资源、气象条件,以光能、热能和植物生理机能的理论为指导,在不同无霜期、不同地力条件的生产基地,分别不同组合进行多次试验研
Pingquan County in 1989 by the Ministry of Agriculture to determine the hybrid corn seed production base, the annual seedling area of about 50000 acres, 20 million kilograms of production up and down, bear the country’s five major corn producing areas in more than 300 users of county production tasks each year . Frost-free period of 90 to 140 days, the year ≥ 10 ℃ effective accumulated temperature of 2300 ~ 3400 ℃, the average annual rainfall of 540 mm (80% concentrated in the crop growing season). The county’s 71.3 million mu of arable land is distributed in 156 long channels of 21 large rivers at an elevation of 335 to 1,000 meters. Adequate natural light, large temperature difference, staggered mountains, vertical and horizontal ditch formed by the unique natural isolation conditions, is very suitable for hybrid corn seed. Based on the local production resources and meteorological conditions, based on the theories of light energy, heat energy and plant physiology, we carry out multiple experiments in different combinations with different frost-free periods and different soil conditions