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Partial replacement of a total mixed ration with annual ryegrass herbage: effects on dairy cow dry matter intake and milk production.
- Source :
-
Journal of Applied Animal Research . Dec2023, Vol. 51 Issue 1, p581-587. 7p. - Publication Year :
- 2023
-
Abstract
- Studies with dairy cows receiving mixed ration and grazing annual pastures, which have low tiller density, are scarce. This study examined the effect of partial replacement of a total mixed ration (TMR) with annual temperate pasture. Treatments were ad libitum TMR (TMR100), 75% ad libitum TMR + ryegrass (Lolium multiflorum 'Maximus') (pTMR75), and 50% ad libitum TMR + ryegrass (pTMR50). Twelve multiparous Holstein and F1 Jersey x Holstein cows were divided into six groups (experimental units), taking account of milk production (26.6 ± 4.55 kg/day), days-in-milk (129 ± 50.8) and body weight (546 ± 30.6 kg). Treatments were compared using two 3 x 3 Latin square arangements, comprising three 21-day periods (measurements during final 5 days). Herbage DM intake increased from 4.8 kg/day with pTMR75 to 6.7 kg/day with pTMR50. Total DM intake decreased from 19.4 kg/day (TMR100), to 18.1 and 15.8 kg/day (pTMR75 and pTMR50, respectively). Milk production, energy corrected milk production (ECM), and milk fat content were similar between treatments, averaging 25.6, 28.4 kg/day and 44.6 g/ kg, respectively. Ryegrass pastures were able to replace up to 50% of TMR offered to mid lactation dairy cows with no adverse effects on ECM production. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ITALIAN ryegrass
*MILK yield
*RYEGRASSES
*DAIRY cattle
*GRASSES
*FAT content of milk
Subjects
Details
- Language :
- English
- ISSN :
- 09712119
- Volume :
- 51
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Animal Research
- Publication Type :
- Academic Journal
- Accession number :
- 175122375
- Full Text :
- https://doi.org/10.1080/09712119.2023.2255071