主要气象因子与抗虫杂交棉纤维品质的关系

Study on the relationship between main meteorological factors and fiber quality of insect-resistant hybrid cotton

【目的】研究不同年份主要气象因子与抗虫杂交棉纤维品质性状的量化关系,为提高棉花纤维品质提供理论依据。【方法】采用灰色关联分析、相关分析和逐步回归法等,对＂中棉29号＂和＂湘杂棉3号＂进行不同年份气象因子与纤维品质间的定量分析。【结果】在湖南省气候条件与栽培技术体系下,棉花纤维品质指标中以麦克隆值的变异系数最大,以7月中下旬至8月上旬所结棉桃的纤维品质最优;相关分析表明,光照时间长、温度高有利于棉纤维成熟,麦克隆值、纤维长度、比强度同时增加;灰色关联分析表明,温度、日照时数是影响棉花纤维综合品质的主导因子;棉花纤维长度、纤维整齐度、比强度三者的信息量占总信息量的91.16%;温度、日照时数对提高纤维品质有利,空气湿度不利于纤维品质的提高,降水量在一定的范围内对纤维综合品质起正作用,超过一定范围后反而起负作用。【结论】温度在30-31℃、光照时间在6-10 h、空气湿度在65%-74%、降水量均匀且在2-4 mm时,棉花纤维品质最优。

【Objective】 Study was done on the quantitative relationship between main meteorological factors and insect-resitant hybrid fiber quality in different years to supply theoretical basis for enhancing cotton fiber quality.【Method】 The relationship was investigated between main meteorological factors and fiber quality of ＂Zhongmian No 29＂ and ＂Xiangzamian No 3＂in different years by using the interpretative methods of grey systematic theory,the correlation analysis and the gradual regression analysis.【Result】 The results showed that：the fiber quality of summer bolls is the best and the variation coefficient of micronaire value is the largest in the fiber quality under the climate condition and cultivation technique in Hunan Province. Longer sunshine time and higher temperature are beneficial to fiber maturation and micronare value, fiber length and specific strength are also increased by correlation analysis. The temperature and sunshine time are the dominant factors affecting the fiber comprehensive quality by the interpretative methods of grey systematic theory. The fiber length, the fiber uniformity and specific strength of cotton account for 91.16 % of total information. Temperature and sunshine time are beneficial to improve the fiber quality, but the air humidity is not. The precipitation has positive effect on fiber comprehensive quality within a certain range and has negative effect when exceeding it. [Conclusion] The characteristics of cotton fiber are optimal when the temperature remain at 30--31 ℃ ,and the sunshine time 6--10 h,and the air humidity 65%-74%,and the precipitation 2--4 mm.