Including chicory or plantain in a perennial ryegrass/white clover-based diet of dairy cattle in late lactation: Feed intake, milk production and rumen digestion
| Autor: | Cameron E. F. Clark, J.M. Lee, E. M. K. Minneé, G. C. Waghorn |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Plantago
Drought tolerance 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences Biology biology.organism_classification 040201 dairy & animal science Rumen medicine.anatomical_structure Agronomy Lactation Cichorium Grazing 040103 agronomy & agriculture medicine 0401 agriculture forestry and fisheries Animal Science and Zoology Dry matter Dairy cattle |
| Zdroj: | Animal Feed Science and Technology. 227:52-61 |
| ISSN: | 0377-8401 |
| DOI: | 10.1016/j.anifeedsci.2017.03.008 |
| Popis: | In temperate grass-based dairy cattle grazing systems, summer dry conditions can reduce feed availability and quality, and limit milk production. This study reports the effects of including high nutritive value, drought tolerant forbs, chicory (Cichorium intybus L.) and plantain (Plantago lanceolata L.), in a grass-based diet of dairy cattle on intake, milk production and digestion. Forty-two mixed aged cattle in late lactation were randomly allocated to one of five dietary treatments in late summer: perennial ryegrass/white clover (PRG) or ryegrass/white clover (ryegrass) with either chicory (CHI) or plantain (PLA) comprising either 20 or 40% of the daily dry matter intake (DMI). Each treatment group included three cattle with a permanent rumen fistula. The experiment was conducted in an indoor feeding facility to allow individual intakes to be determined and comprised of two independent measurement weeks (Week I and Week II). Over the two measurement weeks, milk production and DMI were similar across diets and there were only minor differences in milk composition. Different effects of including chicory or plantain in the diet were observed, however, between measurement weeks. In Week I, DMI of cattle offered chicory or plantain (forbs) was 10% less than cattle offered PRG (14.7 vs. 16.4 kg dry matter (DM)/cow/d, p = 0.039) but milk yield (12.3 ± 0.53 kg/cow/d) and milk component (fat + protein) yield (1.01 ± 0.05 kg/cow/d) were similar across diets. In Week II, DMI was similar (14.2 kg DM/cow/d), but cattle offered forbs produced 19% more milk and 17% more milk component yield than those offered PRG. The decrease in DMI and milk production from Week I to II on the PRG treatment was accompanied by a decline in the estimated nutritive value of the ryegrass in the diets. In sacco incubations of fresh forages showed slower rates of DM degradation of ryegrass, relative to chicory or plantain (0.11 vs. 0.22 and 0.19%/h respectively; p |
| Databáze: | OpenAIRE |
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