Mineralization of inositol phosphate, phospholipids and nucleic acids in soil under waterlogged condition

Abstract

Soil samples incubated with each of potassium dihydrogen phosphate, ammonium sulphate, compost, glucose and lime under submerged condition resulted rapid mineralization of inositol phosphates, phospholipids, inositol hexaphosphate, ribonucleic acid and its derivatives, and deoxyribonucleic acid and its derivatives in the first 15 days. Mineralization was moderate in the subsequent 15 days followed by a gradual disappearence in the next 30 day incubation periods. All the treatments caused a significant miaeralization of organic phosphorus compounds during every sampling in all the soils. Soil containing more organic matter and mineralizable substrates, and high pH showed greater mineralization. Liming promoted mineralization as it induced conditions for the proliferation of phosphorus transforming organisms. Decrease in solubility of exchangeable Fe and A1 also halped in the hydrolysis of inositol phosphate compounds. RNA and DNA alongwith their derivatives meneralized completely in 30 days of incubation in most of the treatments.