论文部分内容阅读
与单施化肥相比，秸秆还田不但提高了土壤有机碳和全氮含量，也提高了土壤腐殖质各组分的碳、氮含量，同时胡敏酸碳／富里酸碳比值增大，腐殖质品质得到改善。施秸秆能提高活性胡敏酸碳和活性富里酸碳占胡敏酸碳和富里酸碳的百分率，有助于活性强的腐殖质的形成。富里酸和活性富里酸的Ｃ／Ｎ比值均小于活性胡敏酸和胡敏酸的Ｃ／Ｎ，说明氮素在富里酸中的富集高于在胡敏酸中的积累。秸秆还田的稻麦年总产量也稳中有升。
Compared with the single application of chemical fertilizers, straw addition of soil not only increased soil organic carbon and total nitrogen, but also increased soil humus components of the carbon and nitrogen content, while humic acid carbon / fulvic acid carbon ratio increased humus quality Improved. Straw application can increase the percentage of active humic acid and active fulvic acid in the percentage of humic acid carbon and fulvic acid carbon, contributing to the formation of highly active humus. The C / N ratio of fulvic acid and active fulvic acid was smaller than that of active humic acid and humic acid, indicating that the enrichment of nitrogen in fulvic acid was higher than that in humic acid. The total output of straw-returning rice and wheat is also steadily rising.