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对中熟品种中棉12,中早熟品种中棉17、早熟品种中棉16分别在露地上进行春播、晚春播、夏播试验,研究其生长发育规律。结果表明,与中熟品种相比,早熟品种的株高生长、主茎叶节发生、果枝伸展、蕾铃发育的相对速率都较快,因而按播种后相同热量单位比较,叶片所占的比例较小,蕾铃所占比例较大,相同单株干重下亦都有类似趋势。但早熟品种的单株生物量和经济产量均相对较小。结果还表明,早熟品种的生长发育速率较高,如适当增加其播种密度,可一定程度上弥补因生长季热量限制与植株小之不足所造成的损失,从而仍获得较高的皮棉产量和霜前花率。文中还建立了一些关系方程,对不同熟性品种生育习性进行了数量分析。
The maturity of varieties of cotton 12, medium early maturing varieties of cotton 17, early maturing varieties of cotton 16 in the open field in the spring, late spring sowing, summer sowing test to study the law of its growth and development. The results showed that compared with the mature varieties, the early maturing varieties of plant height growth, the main stem and leaf section, fruit branch extension, the relative rate of development of bolls are fast, so by sowing the same heat units, the proportion of leaves Small, the proportion of buds larger, the same dry weight of the same plant also have a similar trend. However, the early maturing varieties of per plant biomass and economic output are relatively small. The results also showed that the precocious varieties had higher growth and development rates. If the planting density was appropriately increased, the losses caused by the calorific restriction of the growing season and the small deficiencies of the plants could be made up to a certain extent, thus obtaining higher lint yield and frost Before flower rate. The article also established some relational equations, quantitative analysis of reproductive habits of different maturity varieties.