棉 花 学 报 Cotton Science 2009，21(2)：100-106

 

 

The Effect Temperature and Solar Radiation Meteorological Factors on Yield Character of Cotton Boll and Fiber Quality
WAN Yan，FENG Yan-bo，DING Shi-yong，JIANG Chang-sheng，RONG Li，CHEN Xu，TANG Yi-zu*
（MOA Key Laboratory of Crop Growth Regulation, Cotton Research Institute, Nanjing Agricultural University, Nanjin 210095, China ）

Abstract：Effects of temperature-solar radiation meteorological factors on yield characters and fiber quality characters of cotton boll were studied by setting different or near temperature-solar radiation conditions for cotton boll developing with different sowing dates. The results showed that character ' s variances of cotton bolls were significant or very significant, on different setting nodes in different temperature-solar radiation condition. By using variance value, the comparing results of sensitivity of cotton bolls to climates conditions in different anthesis were: fiber weight of cotton boll> seed cotton weight of cotton boll > weight of cotton boll > lint percentage, and fiber strength> elongation > micronaire > fiber length > uniformity. For different setting nodes, remarkable significance of the cotton fiber weight had been determined among different anthesis. With the significance or remarkable significance positive correlation between temperature-solar radiation factors and characters of yield-quality of cotton bolls, setting models of stepwise regression analyzed and defined these limits: the effective accumulated temperature(≥ 15℃) 408.90～764.77℃ and 471.12～729.74℃ to the weight of cotton boll 6～7.2 g and the seed cotton weight of cotton boll 4.8～5.6 g, the daily minimum temperatures 15.46～26.33℃, 11.2～21.0℃ and 15.9～26.6 ℃ to the fiber weight of cotton boll 1.8～2.3 g and the acceptable micronaire 3.5～4.9 and the fiber length 27～31 mm,the fitting lowest daily average temperature 21.2 ～ 23.7 ℃ to the lowest fiber strength 24.0～25.0 cN·tex-1, the total effective solar radiation 871.45 ～ 899.57 MJ·m-2 to the lint percentage of 40%～42%.
Key words：cotton boll; yield characters; cotton fiber quality characters; temperature and solar radiation meteorological factors       [Full Text, 2910KB]