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一、研究依据和意义随着农业生产的发展、复种指数的提高,晚茬(棉花、红薯、水稻、夏花生等)麦面积逐渐扩大。河南全省晚播小麦面积一般在2,000万亩左右,占麦播面积的20—30%,个别年份达50%以上(如1983年为3,952万亩)。生产中往往把晚播麦归为一般“三类苗”行列,亩产不过100—150公斤,较适播小麦减产三、四成以上。为了解决生产中出现的这一问题,1980年以来开展了冬小麦春性品种不同播期的生长发育特点研究,试图针对品种在不同晚播期中的反应,来制定增产措施,建立晚播小麦的栽培技术体系,以指导大面积均衡增产。
First, the research basis and significance With the development of agricultural production, crop improvement index, late crop (cotton, sweet potato, rice, summer peanut, etc.) wheat area gradually expanded. The area of late sowing wheat in Henan Province is generally about 20 million mu, accounting for 20-30% of the total sowing area and more than 50% in some years (for example, 3,952 mu in 1983). Evening wheat production is often classified as the general “three types of seedlings” ranks, but 100-150 kilograms per mu, more suitable sowing wheat cut three or four percent. In order to solve this problem in production, the characteristics of growth and development of spring wheat varieties during different sowing dates were carried out since 1980. The measures to increase the yield of different winter sowing varieties were discussed in order to establish the cultivation of late sowing wheat Technical system to guide large-scale balanced production increase.