Suitability And Quality Evaluation Of Regional Vegetable Plantation Based On GIS

The paper regarded the cultivated land of the basic farmland protection area in the licheng region of Putian city as the research object. And then thoroughly comparing with the domestic and international environmental quality criterions of soil about ecological, green and organic food, according to the requisitions of soil condition and quality for developing three vegetable production, the key elements of soil capacity were closely combined with the key elements of environmental quality and, mathematic model was utilized to discuss and set up the factors system of the suitability and quality evaluation of ecological, green and organic vegetable plantations on the basis of the datum that resulted from the field investigations and lab analysis of the representative plots of cultivated lands. Then the suitability, quality and limitation of regional ecological, green and organic vegetable plantations were evaluated by GPS, GIS and mathematics model, and then the data-base of the space and property which included the suitability, quality and limitation of the regional ecological, green and organic vegetable plantations was established. At last, Combined with the practice of regional vegetable, the paper discussed the protection and sustainable use of the ecological, green, organic vegetable plantation.The analysis results of principal components of factors screening primarily for the suitability assessment of three standard vegetable plantations showed that the first 12 essential components, composed of environmental integrative pollution index, total salt content, pH-value, slope and so on, twenty-one factors, were contributed 87.64%, 87.82% and 87.83% to the suitability and quality of ecological, green and organic vegetable plantations, respectively. The main factors analysis results showed that what the former 17 main weights of 18-21 factors, made up of environmentalintegrative pollution index, organic matter, pH-value, the total salt content and etc, had done the sum of their weights for the suitability and quality of ecological, green and organic vegetable plantations were 95.73%, 95.84% and 95.84%, respectively. The results indicated that these assessment factors had already represented the most information of the suitability and quality about ecological, green and organic vegetable plantations on the aspects of the soil condition, the soil physical and chemical properties, the capital farmland construction and the environmental quality. Integrating with the results of the principal component and main factors analysis, combining with the theoretical analysis of the factors importance to the suitability and quality of ecological, green and organic vegetable plantation, the paper thought that the 20 factors such as environmental integrative pollution index, organic matter and etc, could be regarded as the major evaluating factors to assess the suitability and quality of ecological, green and organic vegetable plantation.The results of evaluating the suability and quality of ecological, green and organic vegetable plantation showed that the cultivated areas developing those vegetables production in Licheng region of Putian city were 7350.06 hectares, 5014.22 hectares and 1913.91 hectares respectively and their areas were 81.68%, 55.72% and 21.27% of total cultivated land of the basic farmland protection area separately. By the increasing safe request to the quality of vegetables, the amount of cultivated land had been decreasing gradually and the cropland suitable for developing organic vegetable plantation was finite in quantity. The croplands suitable for ecological vegetables were mostly distributed in Beigao, Huangshi and Xindu town. The next was Xitianwei town. It indicated that the mainly districts were distributed in the middle of "Xinghua plain" and the low mesa in the southeast seashore for developing ecological, green and organic vegetable plantation. The district in the northern low relief terrain was distributed less. The cultivated lands suitable for green vegetables were mostly distributed in Be...