准噶尔盆地沙漠增温效应对棉花光合速率、蒸腾速率的影响

沙漠增温效应导致了绿洲不同区域热量资源的分异1],为了进一步了解沙漠增温效应对绿洲不同区域作物的影响,本文通过在准噶尔盆地沙漠区、距沙漠20 km、70 km区域进行试验,从棉花生理生态的角度分析了准噶尔盆地不同区域的农田小气候、棉花净光合速率(Pn)、蒸腾速率(Tr)的差异。结果表明:(1)准噶尔盆地三个区域之间的光合作用有效辐射差异不大;(2)不同区域的大气温度均呈单峰曲线,距沙漠越近的区域温度越高;(3)不同区域的相对湿度都呈现不断下降的趋势;(4)影响区域间Pn、Tr差异的主要因素是气温的差异。

The Temperature Improving Effect of Desert on Photosynthetic and Transpiration Characteristics of Cotton in ZhunGarEr Basin

The affection of temperature improving effect of desert causes the heat difference of different regions of oasis. In order to future understand the temperature improving effect of desert on the crops in different regions,the experiment tested the differences of climate of farmland net photosynthesis rate under the influence of temperature improving effect from physiological-ecological characteristics on the oasis-desert transition region、the region 20km from desert and the region 70km from desert.The results showed that(1) difference of photosynthetical radiation in three regions of Zhun Ga Er basin was not obvious;(2) temperatures of different regions were unimodals.,with the distance from desert decreasing,the temperature becoming higher;(3) the relative humidity of different areas were declined trends;(4) difference of net photosynthetic、transpiration rate of cotton of different regions were obvious relationship with temperature of atmosphere.