Different treatments also displayed significant influences on both soil organic carbon storage and sequestration. Organic carbon storage in the top soil (0-20 cm) was found to be significantly higher in NPKM1, NPKM2, NPKM3, and CM than that in CK and NPK (P ≤ 0.05). Both soil organic carbon storage and sequestration were found to be considerably higher in the plots fertilized with only CMC. Although no statistical differences appeared in soil organic carbon storage and sequestration between NPK and CK, both soil organic carbon storage and sequestration were slightly higher in the former treatment (Fig. 2).