品种熟性对3-2式直播棉棉铃发育的影响

Effect of Maturity on the Cotton Boll Development of the Field Planting Cotton under 3-2 Cotton-wheat Double Cropping System

棉花品种熟性对铃重影响作用表现为中熟品种大于中早熟品种 ,中早熟品种棉纤维发育早于中熟品种。中早熟品种棉子 (仁 )脂肪累积优于中熟品种 ,而蛋白质累积则相反。品种熟性对棉仁中主要酯肪酸含量影响作用较小 ,中熟品种棉仁氨基酸累积优于中早熟品种。 3-

The results showed that the middle maturity cotton boll weight was heavier than that of the earlier middle maturity. Fiber development difference among varieties showed the law that ealier middle maturity varieties were much earlier than that of the middle ones. As to the effect of varieties on fat accumulation in cotton seed(kernel),the earlier middle maturity varieties were more sentisive than that of the middle ones,but the accumulation of protein was just contrary.Effect of varieties on the accumulation of fat acid was small, the middle maturity varieties was advantage of earlier middle maturity varieties as to cotton kernel amino acid accumulation. The varieties seletion under the field planting method with 3-2 model should be determined according to the sowing date.