泥炭和褐煤对土壤有机碳和腐殖物质组成的影响

Effects of Peat and Brown Coal on Soil Organic Carbon and Humic Substances

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 condition of the same temperature and humidity environment, this research studied the effect of the peat and lignite mixing with soil on the impact of the change of soil organic carbon and humic substances, in order to provide theoretical basis for improving the management of soil organic carbon pool in cultivated land. The results showed that with the culture time, soil organic carbon content increased by 0.66% and 17.41%, respectively, after adding brown coal and woody peat to soil, while it fell by 3.15% after adding the herbaceous peat to soil. The carbon content of humic acid showed an increasing gradually trend, while the carbon content of fulvic acid decreased gradually. Soil humin carbon content decreased after adding herbaceous peat to soil, but raised after adding brown coal and woody peat to soil. As a whole, the HA/FA and PQ value increased gradually with the extension of culture time. Therefore, peat and brown coal can increase soil organic carbon content and improve component of soil humic substances, especially in the addition of woody peat to soil.