湖北省近三十年耕地地力等级及养分变化研究

研究了湖北省26个县(市、区)近三十年来耕地地力变化情况。结果表明,耕地总面积减少了17.43%;不同耕地类型和各地形耕地面积均有较大幅度减少;优质耕地面积减少,劣质耕地面积增加,耕地整体质量呈严重下降趋势;土壤中氮、磷养分含量大幅度提高,钾含量、p H降低,土壤有机质含量趋于均一。基于耕地质量现状,建议各级政府高度重视耕地质量建设,加大耕地质量建设投入,推广普及耕地质量新技术、新措施,加强耕地质量评价与监测工作。

Study on Productivity Grade and Nutrient Change of Arable Land in Hubei Province in the Past 30 Years

The change of the arable land fertility of 26 counties (city, area) in Hubei province nearly thirty years was stud-ied. The results showed that the arable land area decreased by 17.43%. The area of different types of cultivated land and ter-rain types on arable land were significantly reduced. The arable land area with high quality reduced, and inferior arable land area increased, on the whole, arable land quality presented a serious decline trend. Nitrogen and phosphorus content in soil increased significantly, pH and potassium content decreased, and soil organic matter became uniform. Based on the quality present situation of arable land, it is suggested that governments at all levels should give highly importance to arable land quality construction and increase the financial input, popularize the new technology and new measures to strength the evalua-tion and monitoring of arable land quality.