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1.选择吐絮正常的中期花留种我省9月20日到10月20日吐絮的中期花,从部位上讲,位于棉株中部几层棵枝,主要是7月20日到8月20日结的伏桃。结铃时间既是棉株生长发育旺盛时期,又是光热资源充裕的季节。一般棉铃大,铃重高,棉籽成熟好,籽粒饱满,种胚大,所含的养分丰富,发芽率高,棉苗顶土能力强,出苗齐而壮,留种最理想。从吐絮时间来讲,9月20日到10月20日气温高,晴好天气多,光照足,棉花吐絮畅,色泽白,棉籽成熟好。过早,8月底到9月初,常遇阴雨天气,并且这个时间吐絮的棉铃一般处于棉株下部,受阴严重,烂铃多,棉籽质量
1. Select the normal mid-flowering flocculent species to stay in our province from September 20 to October 20, the mid-flowering flocculent, speaking from the site, located in the middle of cotton plant several layers of branches, mainly July 20 to August 20 Japanese knot peach. Knot time is not only cotton plant growth and development period, but also abundant light and heat season. General cotton bolls, bell weight, mature cottonseed, grain full, seed embryo, contains rich nutrients, high germination rate, cotton seedling top soil ability, the emergence of Qi and Zhuang, the best species to stay. In terms of bolting time, September 20 to October 20, the temperature is high, fine weather and more light enough, cotton boll flow Chang, white color, cottonseed mature. Premature, late August to early September, often encounter rainy weather, and this time boll boll cotton boll generally in the lower part of the affected by the more serious, bad bell more cottonseed quality