日照时数时间分布对麦套棉铃主要品质性状的影响

对黄河中下游地区主要类型棉麦两熟棉铃主要品质性状与铃期日照时数时间分布关系的研究结果表明：铃重与铃龄25～40d的日照时数关系密切，此时正值纤维加厚盛期和棉仁脂肪、蛋白质累积盛期；纤维长度与铃龄15～25d的日照时数关系密切，此时正值纤维伸长盛期；与纤维强度关系密切的铃龄25～40d和铃龄40～45d分别是纤维加厚盛期和成熟期；纤维麦克隆值与铃龄25～40d日照时数关系密切。主要时段日照时数与各品质性状的关系皆为显著或极显著的正相关关系。

Effects of Distribution of Sunshine Hours on the Main Quality Characteristics of Cotton Boll for the Cotton-wheat Double Cropping

The relationship among the main quality characteristics of cotton boil of cotton-wheat double cropping and the distribution of sunshine hours was as follows: the boil weight and Mik had a close relationship with sunshine hours during 25-40d after flowering, just the stage when cotton fiber thickening and fat and protein accumulating in kernel was much vigorous. Fiber length was closely relative to the sunshine hours during 15 - 25d after flowering, which was vigorous stage of fiber elongating, also. Fiber strength had close relationship with sunshine hours during 25 - 40d and 40 ~ 50d after flowering,the former was the stage in which the fiber was thickening vigorously and the latter was the maturity period of cotton fibre. Mik also had close relationship with sun shine hours of 25-40d after flowering. The relationship between the sunshine hours at key stage and quality characteristics of cotton fibre was correlated positively, significantly or extremely significantly.