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一、推广棉花杂种优势利用的好处 (一)增产显著:棉花杂种一代一般增产20—30％,若组合配制和栽培管理得当,充分发挥杂种优势的作用,则增产更多。杂种二、三代仍有10—20％的增产优势。根据现有资料的统计,目前在黄河流域和长江流域棉区应用的杂交组合中,中国农业科学院棉花研究所配制的“岱字16号×中棉所7号”杂种一代,籽棉比亲本岱字16号增产83.7％,皮棉增产82.7％。比中棉所7号亲本籽棉增产54％,皮棉增产69.9％;河南省农林科学院配制的“中棉所7号×徐州142”分别比对照籽棉增产39.6％,皮棉增产
First, the promotion of the advantages of cotton heterosis utilization (A) significant yield increase: Cotton hybrid generation generally increase 20-30%, if the combination of preparation and cultivation and management properly, give full play to the role of heterosis, the increase yield more. Hybrids two or three generations are still 10-20% yield advantage. According to the statistics of the available data, among the hybrid combinations currently used in the cotton fields of the Yellow River Basin and the Yangtze River Basin, the Dai Dai 16 × Zhongmian No.7 hybrids prepared by the Cotton Research Institute of Chinese Academy of Agricultural Sciences have a higher seed cotton yield than the parents On the 16th, an increase of 83.7%, lint yield by 82.7%. The yield of cotton seed increased by 54% and that of lint increased by 69.9% compared with that of the parent of Zhongmian No.7, and that of “Zhongmiansuo × Xuzhou 142” formulated by Henan Academy of Agriculture and Forestry increased by 39.6%