Humic substances in straw compost with rock phosphate |
| |
| Institution: | 1. Université de Lyon, VetAgro Sup, Laboratoire d''études des Microorganismes Alimentaires Pathogènes (LMAP)/Laboratoire National de Référence pour les STEC, Campus vétérinaire de Lyon, 1 avenue Bourgelat, F-69280 Marcy l''Etoile, France;3. Institut de l''Elevage, Service Qualité des Viandes, route d''Epinay sur Odon, F-14310 Villers-Bocage, France;4. Institut de l''Elevage, Laboratoire d''analyse et de technologie des produits, route d''Epinay sur Odon, F-14310 Villers-Bocage, France;5. Université Paris-Est, Ecole Nationale Vétérinaire d''Alfort, Maisons-Alfort F-94704, France |
| |
| Abstract: | The production of humic substances and their retention capacities for phosphorus and calcium released during composting of wheat straw with two types of low-grade rock phosphate were examined. Relative quantities of humic acids increased with increase of composting time, while fulvic acids production decreased after 30 days of composting. The addition of both Mussoorie and Hyperphos retarded humic acids production and enhanced fulvic acids production. Molasses incorporation had no effect on humic acids but increased fulvic acids production. The production of humic acids and their retention capacity for P and Ca were greater in the presence of Mussoorie phosphate than in the presence of Hyperphos, but fulvic acids formation was higher with Hyperphos. About 80–85% P and 90–95% Ca retained by the total humic substances were found in the fulvic acids fraction. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
