Two depths (10 and 20 cm) of floating sphagnum peat covers were compared to uncovered swine slurries in storage, as a nitrogen conservation method. The test was repeated over three consecutive summers. / Following a nitrogen mass balance analysis, for the manure stored in tanks of limited diameter but full depth, the slurries covered with the two depths of peat conserved 60% and 76% of their nitrogen, while that uncovered conserved only 54%. / The sphagnum peat reduced manure evaporation during storage and helped conserve nitrogen during the tank mixing operation. / A drying temperature of 105$ sp circ$C gave the sphagnum peat moss the most hydrophobicity to keep it floating over liquid manures. The sphagnum peat conserved nitrogen by absorbing the manure moisture rather than by fixing the volatilized ammonia. / Applied to rye grass, the peat treated manure improved the nitrogen uptake efficiency by 140 190% and 190% to 340%, as opposed to untreated manure and chemical fertilizers, respectively.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.69691 |
| Date | January 1993 |
| Creators | Garcia Moreno, Maria del Rosario |
| Contributors | Gehr, R. (advisor), Barrington, Suzelle (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 Engineering (Department of Civil Engineering and Applied Mechanics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001391990, proquestno: AAIMM91789, Theses scanned by UMI/ProQuest. |
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