沙漠增温效应下绿洲棉花热量生产潜力分析

在新疆干旱区,由于暖季沙漠增温效应的影响,与沙漠相邻绿洲区的热量资源相对优越,为植棉提供了有利条件。但随着时空变化,绿洲棉花热量生产潜力也呈现出相应的分异规律。本文以新疆北疆玛河流域石河子平原绿洲区为例,将绿洲与沙漠联系起来考虑,分析了距沙漠不同距离梯度的绿洲区棉花热量生产潜力。结果表明:石河子平原绿洲区内,距离沙漠最近区与最远区之间棉花热量生产潜力相差389Kg/hm2,绿洲与沙漠的距离平均每增加10Km,热量生产潜力下降43Kg/hm2。暖季沙漠增温效应对绿洲棉花的热量生产潜力影响明显,沙漠对相邻绿洲区的农业生产有着正面影响,起到了除太阳外第二个热量源的作用。

Analysis on Heat Potential Productivity of Cotton in Oasis Influenced by Temperature Effect of Desert

In arid land of Xinjiang,due to the improving temperature effect of desert in warm period,the heat resource is superior to the others.It is advantageous to cotton cultivation.But it shows special differentiation along with the changes of space-time of oases.So the heat potential productivities of cotton are various in different regions.Taking Shihezi plain Oasis of Manasi river valley in north Xinjiang as an example,it analyzed the heat potential productivities of 4 regions:150 Farm(10 Km far from the desert),Mosuowan(40Km far from the desert),147 Farm(70Km far from the desert),and Shizongchang(100 Km far from the desert).The results showed that: 150 Farm >Mosuowan>147 Farm >Shizongchang.The nearest region to the desert were 389 Kg/hm~(2) higher than the farthest,and average 43Kg/hm~(2) were reduced every 10Km farther.The improving temperature effect of desert had a sensible influence on heat potential productivities of cotton in oases.The desert has a positive effect on agriculture of the neighborhood in the warm period,and performs as a heat source that is only second to the sun.