Assessment And Regionalization Of Hunan Dominant Crops Based On GIS

Plant choose surroundings and conditions to grow, therefore, agriculture programming must adjust measures to local conditions, It must get the exact inventory in order to make good use of land. In fact, many particular plants are not only related to special geographical, climatic conditions, groundwater and agricultural management, but also to the distribution of some special chemic elements (microelement, rare soil) which are most fit for plant's growth.Having analyzed relation between soil and plant, we found out that the traditional soil classification can't fully reflect the diversity of soil properties, as a result, we suggests that classify soil of Hunan province according to the mineral elements physical properties and original rock refers to some researcher's previous work. Then, based on the new soil classification, we gives a synthetic evaluation to Hunan's several dominant plants, the synthetic evaluation results in first class are regarded as symbol to judge whether the soil is suitable to plant some kind of crop or not. In the end, we gives a agricultural programming to Hunan's dominant plants according to synthetic evaluation results in second class, divides Hunan area into several distinct zones of dominant plant. In this paper, builds up a GIS system about dominant plant estimation and division with which spatial information can integrate with attribute information well, and estimation becomes more reasonable normative and integrative. This paper consists of five chapters, which are listed as follows:Chapter 1, GIS definition system structure and some basic conceptions of agrogeology are discussed in belief. Then, gives a new soil classification based on analyzing relationship between soil and plant. It also talks about source of this task and the primary contents of this research.Chapter 2, recites normal steps and standards of GIS data processing in detail. It gives specific design to the data link with data characteristic and system requirements, some key techniques about data processing are discussed as well.Chapter 3, on the basis of analyzing the theory about dominant plant's estimation and factors, it builds up concrete math model about synthetic estimation and division of Hunan dominant plant. Leaded by fuzzyestimation , the model introduces method that value the weight by the way of expert's experience knowledge. At last, the method and flow of synthetic estimation are introduced with the example of plant-tea.Chapter 4, First introduces about general structure developing model and circumstance main functions and features of the GIS. Second, gives special explain to system design.Chapter 5, all the work of this paper is summarized and chief achievements of this task are concluded, at the same time the following work is suggested.