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我区属特早熟棉区,气候特点是:无霜期短(140—160天),年平均温度低(9—10℃),高温期不长,7—8月上旬仅1个多月。棉花是喜温作物,无限花序,开花顺序由下往上,由里往外,呈圆锥形。中下部内层部位开花,正赶上7月和8月上旬高温期,生长较快,从开花到吐絮只需50—60天,秋季降霜以前,大部正常成熟。但上部和外层部位开花后,多错过高温期,处于秋天低温条件下,生长缓慢,从开花到吐絮,需70天以上,有的甚至没有长大成熟就遇到霜冻,成为霜后花和剥桃花,大大限制了棉花个体发展,这是本地区棉花生育过程中存在的基本矛盾。在这类地区要想夺取棉花早熟高产,
My area is a precocious cotton area, the climate is characterized by: frost-free period is short (140-160 days), the annual average temperature is low (9-10 ℃), high temperature period is not long, only 7 months in early August more than one month. Cotton is a thermophilic crop, infinity inflorescence, flowering from bottom to top, from inside out, was conical. In the lower part of the inner part of the flowering, are catching up with the high temperature in early July and early August, grow faster, from flowering to the bollworm only 50-60 days, before the fall of the frost, most of the normal maturity. However, the upper part and the outer part of the flowering, the more missed the high temperature period, in the autumn low temperature conditions, slow growth, from flowering to bolting floc needs 70 days or more, and some even did not grow up to meet the frost, become frost flower and Peach peel, greatly limiting the individual cotton development, which is the process of cotton growing in the region there are the basic contradictions. In these areas want to seize the cotton early yield,