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以吉林省农安县为例,以GIS为依据,在第二次土地利用现状调查数据基础上,调查了耕地粮食产量和投入的数据,更新障碍层距地表深度、剖面构型、表层土壤质地、土壤有机质含量、土壤p H和盐渍化程度等属性,完成了2010—2012年各等别及产能的更新。研究农安县2010—2012年的自然等、利用等、经济等和产能的变化,各等别与土壤的相关关系,总结农安县近3年各等别发生变化的原因,为合理改良农安县耕地质量提供依据。结果表明,2010—2012年自然等别变化不大,主要原因是自然质量影响因子变化不大;利用等逐年降低而经济等别变化波动较大,这是因为作物的产量变化影响着土地利用系数和经济系数,而近几年产量主要受自然灾害的影响较大。相关分析表明,农用地的各等别与有机质含量,p H呈正相关。
Taking Nong’an County, Jilin Province as an example, based on the second survey data of land use status, the data of grain yield and inputs of cultivated land were investigated. The depth of obstructed layer from the surface, the profile configuration, the texture of surface soil, Soil organic matter content, soil p H and salinization degree and other attributes, completed the 2010-2012 year, the classification and capacity of the update. This paper studies the nature of Nong’an County from 2010 to 2012, and makes use of such factors as economy, capacity and productivity, and the correlation between each category and the soil, and summarizes the reasons for the changes in Nong’an County in the recent three years. In order to rationally improve the farmland of Nong’an County, Quality basis. The results showed that there was not much change in natural classification between 2010 and 2012, mainly due to the small change of the natural quality factors; the use of other declines year by year and the economic change of the other types fluctuated greatly because the change of crop yield affected the land use coefficient And economic factors, while the output in recent years is mainly affected by natural disasters. Correlation analysis showed that all the differences of agricultural land were positively correlated with organic matter content and p H.