Several techniques were compared for the nutritive evaluation of grazed forage. It was shown that esophageal samples were more representative of the grazing animal's diet than clipped samples. High drying temperature affected the intake values obtained by different indicator methods. Results showed that the chromogen ratio and the lignin ratio methods could give relatively accurate and similar intake values provided the correct MEC combinations for chromogen and VanSoest's procedure for lignin were used. In vitro cellulose digestibility and animal behaviour studies suggested that the NVI computed using the lignin ratio method gave more meaningful results particularly for aftermath forages. In vivo and in vitro studies indicated that the first growth forage up to the midbloom stage was superior in feeding value to the best aftermath forage. As measured by the NVI the feeding value of pasture managed differently appeared to be affected more by stocking rate than by the method of grazing. [...]
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.76518 |
| Date | January 1966 |
| Creators | Perera, Michael Ernest. |
| Contributors | Lloyd, L. (Supervisor) |
| 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 | Doctor of Philosophy (Department of Animal Science) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 000594998, proquestno: AAINK00322, Theses scanned by UMI/ProQuest. |
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