Considerable amounts of N can be lost from manure through NH$ sb3$ volatilization. Four laboratory studies were conducted to evaluate the effects of organic amendments on reducing NH$ sb3$ loss from liquid hog manure (LHM). The organic amendments used in these studies were sugar, sawdust and paper products including filter paper (FP), paper bag (PB), newsprint (NP) and pulp sludge (PS). Generally, organic amendments had significant effects on reducing NH$ sb3$ loss from LHM and their effectiveness increased with increasing addition rates. Sugar addition of 3% or higher could eliminate the NH$ sb3$ loss, depending on LHM properties and incubation conditions. The effectiveness of sugar, especially lower rates, decrease with time. The unrecovered NH$ sb4$ loss increased and manure pH decreased with the increase in sugar rates, indicating that the reduction in NH$ sb3$ loss due to sugar addition may have been caused by N immobilization and pH reduction. Sawdust addition reduced the NH$ sb3$ loss by as much as 20% compared to the control. The mixture of 5.5% sugar and 5% sawdust was more effective in reducing NH$ sb3$ loss than 5.5% sugar alone but, lower sugar rates were not similarly affected by sawdust addition. Addition of 5% FP, PB, NP and PS resulted in the decrease in NH$ sb3$ loss by as much as 40, 47, 37 and 29% in comparison to the non-amended manure. The unrecovered NH$ sb4 sp+$ loss and the loss of added C increased with increasing C addition, indicating that N immobilization may be the cause of the decrease in NH$ sb3$ due to paper product additions. (Abstract shortened by UMI.)
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.22814 |
| Date | January 1995 |
| Creators | Subair |
| Contributors | Fyles, J. W. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Natural Resource Sciences.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001467870, proquestno: MM05638, Theses scanned by UMI/ProQuest. |
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