准噶尔盆地沙漠增温效应对棉花光合速率的影响

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区作物的影响,通过在准噶尔盆地沙漠区、距沙漠20和70 km区进行试验, 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和棉花净光合速率(Pn)的差异.结果表明:(1)准噶尔盆地三个区域之间的Par、RH差异不大;(2)不同区域的Tair均呈单峰曲线,距沙漠越近的区域温度越高;(3)在Par和Tair的交互作用下,沙漠区与其他两个区域棉花的Pn的平均值和产量均呈显著差异,距沙漠越近的区域棉花Pn的平均值和产量越高.以往的研究集中在沙漠热量特征对沙生植被的影响或绿洲局地气候对农作物的影响,将两者结合起来从农业角度研究两者关系的还很薄弱,研究有利于充分发掘绿洲热量资源的特殊性,明确绿洲区作物的高产规律.

Infulence of Raising Air Temperature Effect in Jungghariya Desert on Photosynthetic Rate of Cotton

The raising air temperature effect in desert can cause calorie's difference in different regions of oasis.The experiment was carried out in desert area of Jungghariya that was 20 km,70 km distant from the desert to further know the influence of desert raising air temperature effect on the crops in oasis.The analysis on the difference of climate of farmland,photosynthetic rate of cotton in different regions of Jungghariya was conducted from physiological and ecological characteristics of cotton.The experimental results indicated that(1)Difference of Par and RH in three regions of Jungghariya is not significant;(2)Tair of different regions are unimodal curve.The closer away from desert the region is,the higher the air temperature is;(3)Under the interaction of Par and Tair,Pn average value and yield of cotton in desert region and the two different regions are significantly different.