对未灌溉的草原土壤和灌溉的草原土壤腐殖酸的本性研究得很不够,科学文献中的现有资料不可能对灌溉地区土壤腐殖酸的影响做出某种结论。在这篇报导中,提供一些实验资料,介绍伏尔加河下游相关的地带性草原土系主要发生层腐殖酸的本性。对普通黑钙土(古比雪夫州,别津秋克地区)、暗栗钙土(萨拉托夫州,耶尔绍夫地区)和淡 The nature of humic acid in irrigated steppe soil and irrigated steppe soil is poorly studied. The available information in the scientific literature is unlikely to draw any conclusion as to the effect of humic acid in irrigated grassland. In this article, some experimental data are provided on the nature of the major occurrence of humic acid in the associated steppe soil series associated with the lower Volga River. On the ordinary chernozem (Guibishenfu, Beijinqike region), dark chestnut soil (Saratov region, Yershov region) and light