Study On The Technological System Of Suitability Assessment Of Reverting Farmland In Middle And Lower Reaches Of Tarim River

How to realize the science reverting farmland to forestry and grassland in Inland river reaches of Arid land is the question to answer for the paper. It will bring great function into improving environment in oasis of middle and lower reaches of Tarim River. This paper starts with the assessment of the reverting farmland,based evaluation system to carry through the suitability ssessment of reverting farmland in middle and lower reaches of Tarim River ,and the purpose is to find out the feasible gist and technology support of reverting farmland in the region. With verdict of the expert ,choose the evaluation index and use the Analytic Hierarchy Process (AHP) to confirm index matrix. The result shows that among the evaluation indexes of the suitability assessment, the guarantee of irrigation , salt content have impact on reverting farmland. Organic matter content, distance of desert have less impact on reverting farmland. We collect data by surveying in field. Using exponent and the lowest restrict way to found maths model and account reverting farmland index. Furthermore, we plot out the index three step, According to the grade of the reverting farmland index, we protect the 1:100000 suitable reverting farmland sketch map in middle and lower reaches of Tarim River. Ascertain the area and its space distributing of the suitable reverting farmland to forestry and grassland in this region. Suitable reverting farmland area is 7626.67 hm2 and it account of 11.91% of the total area; suitable medium long-dated reverting farmland area is 6646.67 hm2 and it account of 10.38%; the reserved plough area is 49774.1hm2,and it account of 77.71% of the total area. According to the assessment system of the reverting farmland, decided the scale and distribution of the reverting farmland. Aimed at actuality and problem of Tarim river, put forward policy suggest, including keep policy stable and continue and carry out zoology migration allocation, make basic farmland developments, increase the farmland efficiency to make use of resources etc.