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短季棉品种(G.hirsutum)生长发育期短,晚播早熟。前期发育快,开花结铃集中,主茎停止生长早,生长潜力个。适宜播期应在5月25日以后,才能获得最佳产量和优质纤维。 生理测定结果表明,短季棉品种主茎叶中的叶绿素含量,无论在春播或夏播条件下,都不同程度地比中熟棉品种高。光合作用强度前中期高,后期低,花期达到最高峰。结铃盛期以后逐渐下降。在夏播条件下,短季棉品种的氮化合物中,蛋白质氮的含量高于中熟棉品种。在整个生长期中,短季棉品种叶片中的17种氨基酸含量也不同程度地高于中熟棉品种。 短季棉品种糖的合成和积累在初花期略低于中熟棉品种,盛花期和结铃期比中熟棉品种高一倍左右,这对短季棉品种的棉铃生长和纤维发育非常有利。
Short-season cotton varieties (G.hirsutum) growth and development of a short period of time, early sown late. Early rapid development, flowering knot concentration, the main stem to stop growing early, growth potential of a. Suitable sowing date should be after May 25, in order to obtain the best yield and high quality fiber. Physiological test results showed that the chlorophyll content in the main stems and leaves of short-season cotton varieties was higher than that of middle-maturing cotton varieties in spring and summer seeding. Photosynthesis intensity before the high mid-late low, flowering peaked. Knot bell after the gradual decline. Under summer sowing conditions, the content of nitrogen in protein of short-season cotton was higher than that of medium-mature cotton. In the whole growth period, the contents of 17 amino acids in the leaves of short-season cotton varieties were also higher than those of medium-mature cotton varieties. The synthesis and accumulation of sugars in short-season cotton varieties were slightly lower than those in medium-mature cotton varieties at the first flowering stage, and were about twice as that in mid-ripe cotton varieties at full flowering and boll-forming periods, which was very beneficial for boll growth and fiber development of short-season cotton varieties .