Correlation of Milk Production with Quality and Quantity of Herbage Intake under Rotational and Daily Strip Grazing
| Autor: | W.J. Sweetman, A.L. Brundage |
|---|---|
| Rok vydání: | 1960 |
| Předmět: |
Medicago falcata
geography Bromus inermis geography.geographical_feature_category biology food and beverages biology.organism_classification Pasture Correlation medicine.anatomical_structure Agronomy Lactation Grazing Genetics medicine Animal Science and Zoology Multiple correlation Food Science Morning Mathematics |
| Zdroj: | Journal of Dairy Science. 43:674-681 |
| ISSN: | 0022-0302 |
| DOI: | 10.3168/jds.s0022-0302(60)90218-6 |
| Popis: | Summary Chromium oxide and plant pigments have been used as indicators to determine herbage digestibility, fecal output, and digestible and total herbage intake for five cows rotationally and daily strip grazing alfalfa-bromegrass ( Medicago falcata and Bromus inermis ) pasture during the grazing season of 1955. Morning and afternoon fecal samples were composited in the manner of three-day running averages to provide these estimates on a daily basis. The relationship of these variables and milk production to time has been discussed and arguments advanced to support representing time as a discontinuous arithmetic series instead of a simple arithmetic series in this and a previous experiment. Consequently, multiple correlation analyses have been recomputed for the two cows used in the previous experiment and are reported with the analyses for the five cows in this experiment. Although there was a marked linearity of decline in lactation with advancing time, daily milk production was also significantly related to variations in herbage digestibility and live weight. These were the main variables related to milk production under strip grazing. Under rotational grazing, digestible and total intake and fecal output were also significantly associated with milk production. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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