基于分等因素组合的农用地整理类型分区

为细化农用地整理分区，使分区结果在地块尺度上具有适用性，从而提高农用地整理工程效率和精度，该文选择利用农用地分等中间成果，以分等单元为基本研究单元，通过分析单元分等因素组合类型，以及不同组合类型对农用地质量的限制强度，利用ARCGIS空间分析功能，采用综合分区思想对天津市农用地进行整理类型分区研究，并将天津市农用地划分为3个整理类型区。研究发现，天津市农用地自然质量分，即CL组合类型有730种，限制因素组合类型42种，其中灌溉、有机质和盐渍化对农用地的限制相对普遍，这三个因素是农用地整理需要重点考虑的限制因素。研究认为，天津市近期农用地整理重点应安排在限制因素少、整理难度小的类型区三，以农田水利工程建设和典型盐渍化治理为主要方向；远期整理重点可考虑改造难度较大的类型区二，以土壤综合整治为主要目标；类型区一以坡度限制为主，整理改造难度最大，但需要做好水土保持工程建设，该研究对于深化农用地分等成果应用具有重要作用，以期对农用地整理类型分区理论和方法提供一定借鉴。

Farmland consolidation type zoning based on combination of grading factors

The purpose of this paper is to detailing the farmland zoning, and making the results suit to land scale, and then to improve the accuracy of farmland consolidation project. So basing on the results of the Agricultural Land Gradation, took the gradation unit for basic research unit, with the support of ARCGIS software, through analyzed the combined factors of CL and their combined types and the different limited strength of different types, we eventually zoning the farmland of Tianjin into three consolidation type zones. The results showed that there were 730 types of the CL combination and 42 species of the limiting factors combined type in Tianjin. Irrigation, organic matter and salinization were the relatively common limiting factors, key consideration was given to these three factors on farmland. Recent farmland consolidation should be arranged in Zone Three, and the main directions were water conservancy engineering construction and salinization governance; the long-term farmland consolidation should focus on Zone Two; although the Zone One had small area, it still needed soil and water conservation projects. This paper can play an important role in deepen the application of the farmland Gradation, and that study can rich the theory and method in Farmland type zoning, and then provide certain reference.