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1.适当扩大行比,增加母本密度常用玉米自交系株型紧凑矮小,单株产量低。要想获得制种高产,必须适当扩大行比,增加母本密度,提高单位面积产量。母父本行比以4～6:1为好。最佳母本密度,平展型组合每亩4000株,紧凑型每亩5500株为宜。 2.适时早播,足墒足量下种,力争一播全苗夏播制种常因后期气温低生长缓慢或难以成熟,
1. Appropriate to expand the line ratio, increase the density of maize Inbred lines commonly used in maize compact compact, low yield per plant. In order to obtain high seed production, it is necessary to appropriately expand the ratio of lines to increase the density of female parents and increase the yield per unit area. Mother than the Bank 4 to 6: 1 as well. The best female density, flat combination of 4000 per acre, 5500 compact acre per plant is appropriate. 2. timely early sowing, full of adequate subsistence foot, and strive to broadcast a whole season of summer sowing often due to the late growth of low or slow temperature is difficult to mature,