Responses of soil organic and inorganic carbon to organic and phosphorus fertilization in a saline − alkaline paddy field

Abstract There is evidence of increased soil organic carbon (SOC) and inorganic (SIC) under fertilization in dry croplands arid semi-arid areas. However, not much known about the responses SOC SIC coastal saline − alkaline paddy soils that undergo flooding draining cycles. Here, we assess impacts various combinations phosphorus on other properties a field Yellow River Delta. Our study showed resulted an increase by 11.9% over 0 20 cm 13.3% 100 (i.e., 140 250 g C m −2 y −1 cm) whereas only led to significant subsoils (or ~ 75 cm). were little differences among treatments; but decrease combined with lower rate fertilization. high amendment stock, stock subsoil. was negative relationship between stocks this soil. This demonstrated practices could have complex influences fields due cycles lead changes conditions.