Study On The Arable Land Productivity Accounted Of Wuxue City Basd On RS And The Results Of The Agricultural Land Gradation

The continuous work of farmland classification makes our country agricultural land within the system shall be carried out in accordance with the quality of the cascade is divided into different levels of quality, but each a cascade of specific value is uncertain, so you need to actively carry out scientific accounting work of arable land production capacity. For capacity calculation is for an extension of the farmland classification work and practice. According to the theory of agricultural production, the expected capacity and actual production capacity for scientific calculation, the overall agricultural production level and potential distribution through the research of quantitative analysis and to evaluate the quality of agricultural land area different. This topic is based on the current farmland classification performance as the prerequisite, based on extensive and in-depth search sample investigation to create different levels of cultivated land productivity calculation model, in this topic research Wu Xue city as the object of empirical analysis and cultivated land productivity calculation work.Firstly analyses the applicable to the theoretical system of cultivated land productivity calculation, relying on the regional differences, land productivity and grade of land quality, agricultural ecological belt and on the basis of relevant theories such as land suitability to create a ecological environment and economic development theory as the core, in land science theory as the theoretical analysis of the foundation of the system, and then applied to the calculation of cultivated land comprehensive production capacity, have the effect of guidance.Seeondly studies the technique of cultivated land capacity calculation method. Combining with the results in the farmland classification work, by sampling survey method and regression analysis method and the actual survey method and other related scientific way to create the natural quality index and theoretical capacity, which can realize capacity index, such as using mathematical model, then theoretical capacity, expectations and the actual capacity for scientific computing capacity, capacity calculation and research results.The second, in CASA model, remote sensing NDVI data calculation method of vegetation primary productivity calculation founded the NPP of arable land.In cultivated land NPP calculated on the basis of cultivated land output, theoretical capacity and can realize new research capacity calculation method, and comparing with capacity calculation method based on classification, it is concluded that the rationality and scientific nature.Lastly discusses the application of cultivated land productivity calculation results, the calculation results into founded the cultivated land use intensity and potential,Conclusion: founded in the future agricultural of WuXue city development should be mainly concentrated in the northwest region;Founded using potential compared with the potential use in hubei province, despite the use of a full area, but still has certain potential to mining.