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在相同温湿度环境条件下,研究泥炭和褐煤与土壤混合后对土壤有机碳及其腐殖物质组成变化的影响,为改善耕地土壤有机碳库的管理提供理论依据。结果表明:随着培养时间的延长,添加褐煤、木本泥炭的土壤有机碳含量分别上升了0.66%和17.41%,添加草本泥炭的土壤有机碳含量下降了3.15%;胡敏酸含碳量呈逐渐增加的趋势,富里酸含碳量呈逐渐减小的趋势;添加草本泥炭的胡敏素含碳量呈下降趋势,添加褐煤和木本泥炭的土壤胡敏素含碳量呈逐渐上升趋势。土壤胡富比和PQ值整体上都表现出随着培养时间的延长而逐渐增加的趋势。由此可知,泥炭和褐煤能提高土壤有机碳,改良土壤腐殖物质组分,且添加木本泥炭的土壤有机质含量和腐殖物质组分改善效果最好。
Under the same conditions of temperature and humidity, the effects of mixing peat, lignite and soil on the changes of soil organic carbon and its humus composition were studied to provide the theoretical basis for improving the management of soil organic carbon pool. The results showed that the soil organic carbon content increased by 0.66% and 17.41% respectively with the addition of lignite and woody peat as the incubation time increased, and the soil organic carbon content decreased by 3.15% with the addition of herbaceous peat. The carbon content of humic acid The content of carbon in fulvic acid decreased gradually. The carbon content of humin in herbaceous peat decreased gradually. The content of carbon in humin increased gradually with the addition of lignite and woody peat. Soil Huff ratio and PQ values all showed a gradual increase with increasing incubation time. It can be seen that peat and lignite can improve soil organic carbon and improve soil humus composition, and the addition of woody peat has the best effect of improving soil organic matter content and humus composition.