利用棉花杂种优势的技术关键，①是选配优良杂种组合，②是简便快速大量生产杂交种。为了要达到加快杂种棉的发展，后者比前者显得尤为重要。目前生产杂交种的途径多为人工去雄和雄性不育系的利用，前者存在第1天下午去雄，第2天上午授粉的复杂过程，制种成本高；后者存在大田 The key to using the technology of cotton heterosis is that ① is a combination of fine hybrids, ② is mass production of hybrids easily and quickly. In order to speed up the development of hybrid cotton, the latter is more important than the former. The current production of hybrids mostly artificial male and male sterile lines and the use of the former there is the first day of the abortion, pollination the second day of the complex process, the high cost of seed production; the latter field