于田绿洲盐渍土水、盐、温度季节变化规律与相关性研究

以于田绿洲为研究区,借助ENVI 5.1、ArcMap 10.2、Origin 8.5、SPSS 20.0,同时结合野外实测数据,对盐渍土不同土层(0~20、20~40、40~60、60~80、80~100 cm)的土壤含水量、温度、电导率的变化规律及相关性进行了研究。结果表明:研究区土壤含水量、温度、电导率从6月到8月呈升高趋势,绿洲南部和北部地区的5、8号点在60~80、80~100 cm土层的土壤含水量最高,8、22号点表层(0~20 cm)土壤电导率最高,而南部和西部地区的5、22号点在40~60 cm土层的土壤电导率最高;秋季和夏季的土壤含水量、温度、电导率均高于冬季和春季。研究区西部的16、22号点各土层的含水量与电导率呈显著正相关,在60~80 cm土层的土壤含水量与电导率的相关性最强,相关系数分别为0.970**、0.987**。

On Seasonal Variation and Correlation of Saline Soil Water, Salt, and Temperature in Yutian Oasis of Xinjiang, China

Based on ENVI 5.1, ArcMap10.2, Origin 8.5, SPSS 20.0 analysis tools, using the measured data, this paper quantitatively analyzed the seasonal variation and correlation of saline soil water, salt, and temperature in Yutian Oasis, which is located in the southern Tarim Basin, and the environmental problems caused by anthropogenic activities and natural conditions prevented the agricultural sustainable development. It can be seen, discussing the seasonal variation and correlation of saline soil water, salt, and temperature has significant importance to some extent. The results showed that the soil water, temperature and electrical conductivity in different soil profile has showed a trend of gradual increase from June to August, and the No.5 and NO.8 sampling point in the southern and northern area has showed high water content in 60 ~ 100 cm layer, the maximum electrical conductivity of NO.22 sampling point has happened in 20 ~ 60 cm layer, and the water content, temperature and electrical conductivity of different soil layer in Autumn and summer was higher than winter and spring. Correlation analysis results shows that the water content and electric conductivity of No.16 and NO.22 sampling point has significantly positively related in 60 ~ 80 cm layer, and the correlation coefficient respectively 0.970** and 0.987**. The reasons of the seasonal variation and correlation of saline soil water, salt, and temperature are the human activities, geographical position, local population, economic development, climate change, local policy and so on, this research provides reference and guidance for sustainable development of ecological environment and agriculture in Yutian Oasis.