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以高分子化合物为主配制成砂姜黑土土壤改良剂（简称ＰＨ－Ｉ），采用盆栽试验，研究其对砂姜黑土的改良作用。结果表明：ＰＨ—Ｉ能显著地改善砂姜黑土的物理性状，有利于土壤团聚体的形成，尤其是增加团聚体的水稳性，施用ＰＨ－Ｉ能降低土壤容重，提高土壤总孔隙度和通气孔隙度，大幅度提高供试萝卜的产量。
The main purpose of this study was to make the soil amendment (PH-I) of the Shajiang black soil with polymer compounds, and to study the improvement effect on the Shajiang black soil by pot experiment. The results showed that: PH-I can significantly improve the physical properties of Shajiang black soil, is conducive to the formation of soil aggregates, especially to increase the water stability of aggregates, PH-I can reduce soil bulk density and increase soil total porosity and Ventilation porosity, a substantial increase for the yield of radish.