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我站位于北纬34°04′、东经115°18′的黄淮之间予东平原上,常年无霜期平均为220天。在1976年玉米加代试验的基础上,1978年在不使用温室育苗的条件下,又搞了一年的玉米加代试验。第1代单粒抪种83粒,收获74株,单株结籽451粒,将收获的种子一部分又种在7分土地上,收获玉米种142斤,两代加起来,繁殖系数达13900倍,获得了成功,并初步掌握了一些关键性技术措施.我们认为,凡是中早熟品种,无霜期在210天以上的地区,一年均可就地种植两代。无霜期的不足,是加代中矛盾的主要方
The station is located on the east plain between Huanghuai at latitude 34o 04 ’north and longitude 115o 18’ east and has an average frost-free period of 220 days throughout the year. On the basis of maize addition test in 1976, 1978 did not use the greenhouse nursery conditions, but also engage in a year of corn plus test. The first generation of single grain seed 83 species, 74 were harvested, 451 single seeds, the seeds will be harvested in another part of the planted in 7 points of land, corn harvest 142 pounds, the two generations together, the multiplication coefficient of 13 900 times , Was successful, and preliminary grasp of some of the key technical measures.We think that all the varieties of early maturity, frost-free period in more than 210 days, one year can be planted in situ two generations. Frost-free period, is the main contradiction between the Canadian side