Study On Construction And Distribution Law Of Factors Combination Of Arable Land In Hebei Province

Arable land is the most basic means of production for food production, is the indispensable condition for human survival, is the basic conditions access to the basic agricultural products for example grain, cotton, oil-bearing crops and so on, is the fundamental guarantee of the agricultural sustainable development. However, the security situation of arable land resources is not optimistic in China, and the security issues of the arable land resources will be serious increasingly, therefore there is a great difficulty in the management of arable land resources. In this paper, basis on the analysis of the arable land system, the factors combination of arable land is defined, and the way of constructing its model is raised, the features of arable land system is descriped, the factors combination system of arable land is constructed, finally its distribution law is analysed, and the conclusion are as follows:(1)Through the systematic analysis of the arable land, the concept of its factors combination is raised, and the fundamental starting point of constructing the factors combination of arable land is found. Arable land system is constituted from natural factors and socio-economic factors, and the arable land quality is the comprehensive result of the arable land elements. The factors combination model of arable land is able to descrip the quality of arable land, and its science and work definition is(2)The affect factors of the arable land quality are selected, and the principles and methods of choosing the factors for the factors combination of arable land. Against the actual of Hebei, each area about the factors combination of arable land is classified, the factors including the soil organic matter, the guaranteed rate of irrigation, the topsoil texture, the soil structure, the gradient, the soil thickness, the soil of salinity level, the drainage conditions are selected, and digital code is used to express the eight factors and their indicators status. The factors combination model of arable land is made.(3)By the way of establishing the factors combination system of arable land, agricultural land classification data of Hebei is summarized and finally there are 1290 kinds of the factors combination for arable land in Hebei. Through the use of the MAPGIS software, for all kinds of the factors combination, its area is calculated and its distribution map is made, Connecting with Topography, geomorphology, hydrology, climate and so on ,further we get the distribution Law of the factors combination in Hebei.