Study On Soil Salinization Spatial Distribution Based On The LUCC In Typical County Of Western Jilin Province

Soil salinization has been becoming a global issue. It not only influences the problems of resources, environment and zoology, but closely bound up to the sustainable development of society and economy. Soil salinization is a major obstacle of developing regional farming and animal husbandry. Cultivated land, grassland and carrying capacity of livestock have been reducing due to Soil salinization. Therefore, it is important to study soil salinization where that can be the effective way ofdealing with vast salinized land resource, restrain soil salinization tomaintain, manage vigorously developing regional economy and tomaintain agricultural sustainable development.The western Jilin porvence is one of the most salinization areas in china. Because of the excess utilization and affection of nature condition, the salinization of soil accelerate these years, which represent as the expands of square and aggravation of salinization extent. Tongyu County is one of the representative regions inwhich there are the most serious saline-alkali soil in the West of Jilin Province. Lucubrate the land salinization spatial distribution raw in Tongyu—that is very important for us to treat and prevent from Soil salinization. Tongyu County was selected as the research region, research were carried on by Soil Salinization Spatial Distribution based on the LUCC in Typical County of Western Jilin Province.This thesis is supported by the agricultural item of Jinlin Geological Survey—"The evaluation of ecological condition and geochemistry in western Jinlin province"and the project of Natural Science Foundation of China"Foundation and Application of Digital Information System on the Agricultural Eco-environment System in the Southwest Part of the Songnen Plain"etc.The dynamic change of the land-use situation was as the study base of the ecological environment changes. The author applied the RS-GIS-GPS integrated technology to get the land use maps of 1989, 2000 and 2004 in Tongyu hinterland using Landsat TM images. The maps were applied to analyze the the quantity of changes, the perspective of land use change types and the spatial distribution of changes in Soil salinization. The studies have shown that, from the quantity of changes, the area of saline alkali soil rapidly increase between 1989 and 2000, but reduced between 2000 and 2004. From the perspective of land use change types, saline alkali soil mainly came from the degradation of grasslands, waters and wetlands shrink. From the spatial distribution of changes, the overall trend of land use degree is that east is higher than west, north is higher than south and plain is higher than lowland.Correlation among the salinization and alkalization parameter—total salt, pH, alkalinity, rasidual carbonate, sodium adsorption ratio and the main soluble salt analysis are made by application of SPSS software. The results show that, total salt was significantly positive correlated with Cl-, HCO3- and Na+; pH was significantly positive correlated with CO32- and Na+; alkalinity was significantly positive correlated with Cl-, SO42- and Na+; rasidual carbonate and sodium adsorption ratio were significantly positive correlated with CO32-, SO42- and Na+; Confidence measure is 95%-99% with the result of the double significance tests. Choose the variation characteristic of salinization and alkalization parameter and the main soluble salt—HCO3-, CO32- and Na+ as the eighth indexs by application of SPSS software.The contour line of arsenic concentration was drawed by Surfer Software to analyze the variation characteristic of salinization and alkalization parameter and the main soluble salt—HCO3-, CO32- and Na+ in the horizontal direction. Spatial overlay technique is applied to analyze the relationship between the eighth index to get the distributing of soil salinization maps,and to analyze soil salinization spatial distribution in Tongyu county. The work of vertical section distribution was analyzed at the same time.The genetic are analyzed with above study in soil salinization. Therefore, Spatial overlay technique is applied to analyze the relationship between soil stalinization spatial distribution and environmental geology characteristic. The studies have shown that genetic analysis in soil salinization are mainly effected by geology, climate and social and economic factor.The features and innovations of the thesis were that Spatial overlay technique is applied to analyze Soil Salinization Spatial Distribution based on the LUCC between 1989,2000 and 2004 in Typical County of Western Jilin Province. The dynamic change of the land-use situation was as the study base of the ecological environment changes. The author applied the RS-GIS-GPS integrated technology to get the land use maps of 1989, 2000 and 2004 in Tongyu hinterland using Landsat TM images. Based on the materials collection, field survey and the sample testing, Choose the variation characteristic of salinization and alkalization parameter and the main soluble salt—HCO3-, CO32- and Na+ as the eighth indexs by application of SPSS software. Spatial overlay technique is applied to analyze the relationship between the eighth index to get the distributing of soil salinization maps,and to analyze soil salinization spatial distribution in Tongyu county. Through the genetic are analyzed with above study in soil salinization, the paper provided the scientific basis of evaluation standards and establishment of powerful protection policy for soil salinization in Western Jilin Province.