Abstract:

To study the current situation of soil salinization in Xinjiang Production and Construction Corps (XPCC), relevant investigation tables, i.e. "Classified Area Table of Saline-alkali Land", "Chemistry Type Table of Saline-alkali Land", "Production Status Table of Saline-alkali Land of Different Degrees" and "Improvement Status Table of Saline-alkali Land"were designed based on the division standard of saline-alkali land from 2015 to 2017, and the soil salinization status of 139 farms were investigated. The results showed that: the salinized farmland area of XPCC was about 531000 hm², accounting for 44% of the total sown area (1202000 hm²); about 23.2% of salinized farmland was primary saline soil, and 76.8% of that was secondary saline soil; the areas of sulfate-type, chloride-type, soda-type and alkali-type salinized cropland were 161900, 58500, 206500 and 104100 hm², respectively, accounting for 30.5%, 11.0%, 38.9% and 19.6% of the XPCC's salinized soil area; secondary salinization generally resulted in the reduction of crop yield and the increase of input of fertilizer and organic fertilizer with salinization. At present, there are different methods in the treatments of saline-alkali land, such as, water conservancy improvement, agricultural improvement, biological improvement and chemical improvement, but the effects are different. the improvement effects of water conservancy measures and agricultural measures are good. In order to prevent and control soil salinization, it is necessary to establish the farmland quality database and the leading group of salinization farmland comprehensive management of XPCC, and jointly carry out technical research and integration with universities in and outside of Xinjiang.

Key words: Xinjiang Production and Construction Corps, Salinization, Types, Improvement, Current Situation, Comprehensive Control