影响阿克苏棉区棉花单产的温度要素分析

通过对阿克苏棉区棉花气候产量与不同长度时段、不同类型温度要素的相关分析，结果表明：（1）采用不同长度时段的日温度要素与棉花气候产量进行相关分析，比采用旬温度要素的工作更细致，更合理，更易找出对棉花气候产量影响较大的有生物学意义的较佳时段和温度要素；（2）在平均温度、最高温度及最低温度3个温度要素中，以最高温度对棉花气候产量的影响最大，其次是平均温度，最低温度最小；（3）春末及夏季的低温对阿克苏棉区的棉花气候产量形成具有一定的制约作用。温度要素对阿克苏地区的棉花气候产量有最大影响的时段是在盛夏的棉花开花－开花盛期（7月14日－7月28日），其次为春末和夏季的前中期（5月17日－7月24日）的属于第一真叶－开花盛期的时段。而农一师则不同，主要在夏季中后期（7月5日－9月3日），大体相当于棉花开花－裂铃前这一时段。

Analysis of Temperature Elements Affecting Per Unit Area Output of Cotton in Akesu Cotton Region

By using the correlation analysis of cotton climatic output and temperature elements of different temperature types and different length periods of time in Akesu cotton region, the results obtained indicate (1) using daily temperature elements of different length periods of time correlated with cotton climatic output is more useful, more reasonable and more easily in founding out optimum temperature elements with biological significance than using ten days temperature elements; (2) In three temperature elements of mean temperature, maximum temperature and minimum temperature, the effect of maximum temperature on cotton climatic output is the greatest, mean temperature is greater, and minimum temperature is the least; (3) The low temperature in later spring and summer have some limiting effects on forming cotton climatic output in Akesu cotton region. The periods of time, in which temperautre elements have greatest influence on cotton climatic output in Akesu cotton region, are from cotton flowering to full flower stage in summer (July 14 to July 28) and from later spring to middle summer (May 17 to July 24), the later is the period of time from the first leaf to full flower stage. But that in Nongyishi is different, it is mainly in middle and later of summer (July 5 to September 3), which is about equivalent to the period of time from cotton flowering to the stage before cotton ball opening.