Analysis of driving mechanism of cultivated land resources security of black soil region in Songnen high plain
For profoundly anatomizing the effect mechanism of driving factors which affecting cultivated land resources security in study area, studying the driving mechanism of cultivated land resources security in study area, providing scientific basis to ensure the health of cultivated land and to protect the national food security. This paper takes black soil region of Bayan county in Songnen high plain as study area, using Matlab programming, adopting Genetic Algorithm to improve Neural Networks and combining correlation analysis, recognizing the prime factors and getting the related to the sensitive influential factors of cultivated land resources security, clarifying the effect mechanism and driving synergistic of influential factors and revealing the driving mechanism of the cultivated land resources security through multiple regression analysis and complete quadratic regression analysis. It turns out:The synergistic effect relations of cultivated land resources security in study area. The factors play a significant impact to the cultivated land resources security, and they have different synergistic effects in different influential factors. The synergistic effects get positive and negative interactions and have variants strength of different influential factors. The natural factors play a catalytic role in the security of cultivated land resources in study area. The socio-economic factors and ecological factors play an inhibition role in the security of cultivated land resources in study area, and socio-economic factors play inhibition strongest, followed by ecological factors. Effects of socio-economic factors play the most remarkable role on cultivated land resources security, natural factors secondly, the role of ecological factors not obvious. Among the main factors, soil texture plays the strongest role in promoting cultivated land resources security,the strength is 0.5654, next is pH value, the strength is 0.2563, while black soil thickness plays the weakest role, the strength is 0.0662. Altitude plays the strongest role in inhibiting cultivated land resources security, the strength is 0.3721, next is water and soil erosion, the strength is 0.3580, while fluorine plays the weakest role, the strength is 0.0131. The results provide a reference to protect cultivated land resources of black soil area and to rational use cultivated land resources.
land usemodelsgenetic algorithmsblack soil region in Songnen high plaincultivated land resources securitysynergistic effectGA-BP dimensionality reduction model
国家科技期刊平台
NSTL
万方数据
维普
