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随温度降低纤维伸长最大值降低 ,伸长期延长 ;夜间温度对纤维伸长的影响大于日均温。纤维断裂比强度随铃龄增大而升高 ;相同铃龄随温度下降断裂比强度降低。随纤维发育 ,纤维成熟度升高 ;随温度降低 ,成熟度随铃龄增大增幅降低 ,相同铃龄随温度下降成熟度值呈下降趋势。细度随纤维发育逐渐减小 ,全铃期夜均温 16 7℃和≥ 15℃有效积温 1142 9℃是细度变化临界点 ,低于该温度时细度随纤维发育降低缓慢 ;相同铃龄随温度下降呈升高趋势。
As the temperature decreases, the maximum value of fiber elongation decreases and the elongation period increases. The effect of night temperature on fiber elongation is greater than the average daily temperature. The breaking strength of fiber increased with the increase of boll age. The breaking strength of fiber at the same boll age decreased with temperature. With the development of fiber, the fiber maturity increased; with the decrease of temperature, the maturity increased with the increase of boll age, while the same boll age decreased with the decrease of maturity. The fineness decreased gradually with the fiber development. The average night temperature of full-boll phase was 16 7 ℃ and the effective accumulated temperature of ≥ 15 ℃ was 1142 9 ℃, which was the critical point of fineness variation. Below this temperature, the fineness decreased slowly with the fiber development. With the decline in temperature showed an upward trend.