兼顾活性与稳定性有机质的黑土培肥机理OA北大核心CSTPCD

Due to the differences of carbon chemical composition,there are differences in the activ-ity and stability of soil organic matter after application of corn straw and peat.To explore this effect,a field micro-area experiment based on full straw return to the field(10 000 kg/hm2)was conducted,with a total of 5 treatments:control treatment(ck),corn straw(0P),corn straw and peat 2∶1(1/3P),corn straw and peat 1∶2(2/3P),and peat(P).The results show that with the increase of the proportion of peat application,the content of soil organic matter,the conversion rate of soil organic matter,the content of humic acid and the ratio of humic acid to soil organic matter increased at first and then de-creased.The 2/3P treatment was the highest,with an increase of 6.47%,63.38%,30.84%,and 22.38%compared to the 0P treatment,respectively,while the content of mineral-bound organic mat-ter,the condensation degree,aromaticity and hydrophobic/hydrophilic ratio of humic acid increased gradually,and the P treatment even exceeded that of ck.To sum up,when the ratio of corn straw to peat is 1∶2,it has a positive effect on balancing soil activity and stable organic matter formation,making it suitable for soil fertilization.