Phosphorus sorption and extractability in Andic soil incubated with plant residues of variable P content |
| |
Authors: | A H Bumaya D V Naylor |
| |
Institution: | (1) Soil Science Division, University of Idaho, 83843 Moscow, ID, USA |
| |
Abstract: | Sodium acetate extractable P and P sorption were measured in a high P-sorbing Andept soil (Mission series) following incubation with Winter wheat (Triticum aestivum (L.)Nugaines) and red clover (Trifolium pratense (L.)Florex) plant residue. The effects of plant residue P content, moisture regime, and quantity added were evaluated over a twelve week incubation period. Increased extractable P and decreased P sorption occured when the P content of residue exceeded 0.1% P for both winter wheat and red clover. The extractable P decreased and the P sorbed increased for all treatments and the check as the incubation time progressed. Extractable P increased and P sorption decreased more under air dry moisture conditions than at –0.03 MPa or saturation. Extractable P levels increased and P sorption decreased with increasing amounts of added residue. The effects of the residue additions decreased with increasing incubation time. |
| |
Keywords: | extractable P organic residues P sorption volcanic-ash influenced soils |
本文献已被 SpringerLink 等数据库收录! |
|