Laboratory incubation was conducted for 120 days to study the fate of phosphorus in poultry (PM), cattle
(CM) and goat manures (GM). Phosphorus mineralized from manure was dependent on total P, Al and Fe
content. Manures improved P availability in the order: PM > CM > GM; however, the highest amount of P
was fixed or immobilized between 10 and 70 days of incubating with CM and GM. Fixation and immobilization
of mineralized P from poultry manure was negligible probably due to the high total P and the low
amount of Al and Fe. Generally, manure application reduced the ability of the soil to fix P. More than 90%
of the manure P was either immobilized or fixed by the soil. The relationship between the amount of P
released and time was cubic. Improvement of the C:P ratio of CM and GM would be an option to enhance
their agronomic use as fertilizer P source.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:tut/oai:encore.tut.ac.za:d1001448 |
| Date | 11 December 2009 |
| Creators | Van Averbeke, W, Azeez, JO |
| Publisher | Elsevier |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | |
| Rights | c 2010 Elsevier Ltd |
| Relation | Bioresource Technology |
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