Conservation practices modify soil phosphorus sorption properties and the composition of dissolved phosphorus losses during runoff

It is well established that shallow tillage (ST) and no-tillage (NT) of cultivated soils can have higher risk dissolved phosphorus (P) loss during runoff than conventional (CT). However, quantitative descriptors how differences in practices influence soil P sorption properties these turn remain lacking. Moreover, the on forms P, particularly molybdate unreactive (MUDP), has rarely been investigated. Thus, we simulated using pilot had experienced three (CT, ST, NT) two types fertilization (pig poultry manure) for 20 years. The results indicated shifting from CT to ST or NT changed soil’s capacity bind increased Olsen-P, Dyer-P, equilibrium concentration (EPC0), water soluble (WSP), degree saturation (DPSOX). experiment confirmed switching could increase runoff. was evident fertilizations manure with an amplified effect modality. Switching MUDP, which again fertilization, percentage MUDP more 40% TDP. Correlations between assessment indicators were positive, but DPSOX opposite predicted other indicators, indicating not suitable predicting loss. Our suggest should be considered when assessing adopting NT, since bioavailable thus contribute eutrophication surface water.