禹城市耕地养分时空演变研究

[目的]为了解禹城市区域耕地养分现状和变化情况,掌握中低产田改造结果,进一步提升土地生产力,稳定粮食产量。[方法]比较了山东省禹城市1980和2008年耕地养分的时空变化。[结果]土壤有机质、速效磷的含量均提高1倍以上,而土壤全氮和速效钾的含量也得到较大提高。空间上,2008年各种土壤养分缺乏区面积均大面积下降,1980年盐渍化土壤大面积分布情况得到极大改善,仅1%左右的面积存在轻度盐渍化威胁。[结论]近30年的中低产田改造和盐碱地治理,禹城市耕地土壤质量得到显著提高。

Study on Temporal-spatial Evolution of Soil Nutrient in Yucheng City

[Objective] The study aimed to investigate the status and changes of soil nutrient in Yucheng City,grasp the transformation results of medium-and low-yielding field,further improve the productivity of land,stabilize grain output.[Method] Temporal-spatial changes of soil nutrient in 1980 and 2008 in Yucheng City of Shandong Province were compared.[Result] The content of soil organic matter and available phosphorus increased more than one time,the content of soil total nitrogen and available potassium have also significantly increased.In space,the deficient areas of soil nutrient increased significantly in 2008,in 1980,the distribution of soil salinization improved greatly,only 1% area was threatened by soil salinization.[Conclusion] Because of medium-and low-yielding cultivated land improvement and saline soil treatment,soil fertility quality in Yucheng City increased significantly during the past 30 years.