Fate of low-molecular-weight organic phosphorus compounds in the P-rich and P-poor paddy soils

Continuous application of organic fertilizers can cause accumulation phosphorus (P) in soil, especially the low-molecular-weight (LMWOP) forms. This P pool represents a potentially important source for both plants and microorganisms. To understand effect long-term fertilization (30 years) (P-rich soil) vs. fallowing (P-poor on bioavailability fate LMWOP subtropical paddy soils, we determined sorption mineralization 14C-labeled adenosine, adenosine monophosphate (AMP), diphosphate (ADP), triphosphate (ATP) each soil. The contents carbon, nitrogen, P-rich soil were more than two times greater those P-poor rates compounds faster compared to followed order AMP>ADP>ATP. Using sterilized all forms adenosine-P strongly sorbed solid phase reached saturation short time, with adsorbance increasing number phosphate groups. We concluded that was repressed slightly by phase, but only term. Thus, serve as readily available sources C microorganisms, making themselves well plants. However, progressive sites highly fertile soils may increase potential risk runoff.