砂姜黑土是黄淮海平原地区的低产土壤之一。其低产原因有二:一是土壤有机质含量低,而且难以分解的组分又占相当大的比重,有效养分贫乏;二是粘粒含量高,湿时土壤膨胀,干时收缩,结构性差,保墒能力弱,耕性不良。但砂姜黑土大量施用有机物质可以改善其性质, Shajiang black soil is one of the low-yielding soils in the Huang-Huai-Hai Plain. The reasons for low yield are two: First, the content of soil organic matter is low, and difficult to decompose the components account for a considerable proportion, the lack of effective nutrients; second clay content is high, wet soil expansion, dry contraction, poor structure, soil moisture Poor ability, poor tillage. However, the large amount of application of organic matter in the Shajiang black soil can improve its properties,