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一是晚秋桃的棉籽。据试验,伏桃棉籽的健耔率高,发芽率在85%以上,生出的棉苗健壮发育早;而晚秋桃棉籽的发芽率在50%以下。这是因为,晚秋桃棉籽生长发育时间短,成熟度差,棉籽内脱落酸含量高,抑制了发芽。二是喷了乙烯利的棉籽。棉株喷了乙烯利后,养分集中向棉纤维输送,促进棉铃提早成熟吐絮,但供给棉籽的养分明显减少,健籽少、嫩耔多,如若做种则弊多利少。
First, late autumn peach cottonseed. According to the test, the high rate of health peach cottonseed germination, germination rate of 85% or more, give birth to the vigorous development of cotton seedlings early; and the late autumn peach seed germination rate below 50%. This is because late autumn peach cottonseed growth and development of a short time, poor maturity, high content of abscisic acid in cottonseed, inhibition of germination. The second is sprayed ethephon cottonseed. Cotton plants sprayed with ethephon, the nutrients concentrated to the cotton fiber transport, cotton boll promote bolting early mature, but significantly reduced the supply of cottonseed nutrients, less seedlings, tenderness and more, if done more harm than good.