Evaluation Of Soil Fertility In Chifeng

Represents the production potential of soil fertility in arable land, we determine the sustainability of agricultural production, and a direct impact on our country’s food security, cultivated land fertility evaluation is understand the various regions and to improve the level of soil fertility in urgent requirement of cultivated land quality. Fertility evaluation of cultivated land in the country before the county level is nearing completion. But the county cultivated land fertility evaluation of the results of the outcome has its limitations, as well as to meet the municipal needs of cultivated land fertility evaluation unit. Therefore, in order to find out the municipal farmland productivity evaluation as soon as possible is very important. In view of this, the present study, Chifeng City, for example, can be used in the initial adoption of a municipal cultivated land fertility evaluation workflow and the level of distribution of arable land force throughout Chifeng detailed analysis and research.In this paper, based on the theory of cultivated land fertility evaluation, the use of GIS technology and expert scoring method, AHP, fuzzy comprehensive evaluation method combination of cultivated land fertility evaluation of Chifeng City. First, the study area data collection and collation, get in GIS technology under study area topography, geology, climate, land use patterns, soil nutrients and other data, and the establishment of basic information database research area of cultivated land fertility evaluation; Secondly, Chifeng soil map superimposed current land use map polygon Get Chifeng cultivated land fertility evaluation evaluation unit, according to the actual situation of Chifeng City, by consultants and through field trips, select precipitation,≥10℃ accumulated temperature, soil texture, soil organic matter, landforms, texture configuration, slope, the degree of erosion, irrigation guarantee rate these 10 indicators as evaluation factors, the use of AHP method to determine the weight of each evaluation factors, the establishment of Chifeng fertility evaluation index system of cultivated land; again, fuzzy a comprehensive evaluation of single factor evaluation method to calculate the degree of membership of each evaluation factor, the weighted index summation of a comprehensive analysis of all evaluation factors impact on farmland productivity, combined with SPSS, EXCEL and other software to calculate the composite score for each evaluation unit; Finally, the use of cumulative grading curve will be divided into farmland productivity Chifeng First place, second place, third place and fourth and fifth places, etc.5 level, and put forward specific proposals.The Chifeng City is different from the force of arable land evaluation at the county level, since the cultivated land fertility evaluation of municipal units, taking into account the scope and impact of its large area of macro factors, the main consideration of the Chifeng City topography,≥10℃ accumulated temperature, precipitation and irrigation guarantee rate this 4 evaluation of soil fertility in municipal units as the main evaluation factors, making the research results more appropriate municipal cultivated land fertility evaluation based on the results of the evaluation on county cultivated land fertility. Chifeng City in farmland productivity evaluation result, the level of quality in the proportion of arable land is relatively low. First place, second place, third place, four and five other places and other places occupied arable land accounted for 14.07% of the total area of arable land,17.05%,9.74%, 51.62% and 7.52% respectively. For high-quality arable crops should develop good local advantages, and make recommendations to protect, for the distribution of the largest four and so on, there are put forward reasonable suggestions.