Impact of a total mixed ration or pasture/pasture silage-based feeding strategy in the initial stages of lactation of spring-calving dairy cows on milk production, composition and selected milk processability parameters

被引:0
作者
McKay, Z. C. [1 ]
Mulligan, F. J. [2 ]
Brady, E. L. [2 ]
O'Sullivan, M. [3 ]
Rajauria, G. [1 ]
Lynch, M. B. [1 ]
O'Callaghan, T. F. [4 ]
Pierce, K. M. [1 ]
机构
[1] Univ Coll Dublin, Sch Agr & Food Sci, Lyons Res Farm, Lyons Estate Celbridge Naas, Kildare W23 ENY2, Ireland
[2] Univ Coll Dublin, Sch Vet Med, Dublin D04 W6F6 4, Ireland
[3] Univ Coll Dublin, Sch Agr & Food Sci, Dublin D04 V1W8 4, Ireland
[4] Teagasc Food Res Ctr, Dept Food Chem & Technol, Fermoy, Cork, Ireland
关键词
Dairy cow; early lactation; milk composition; processability; CONJUGATED LINOLEIC-ACID; FATTY-ACIDS; CONCENTRATE SUPPLEMENTATION; CONSUMING PASTURE; GENETIC SELECTION; METABOLIC STATUS; PERFORMANCE; HOLSTEIN; GRASS; SYSTEMS;
D O I
10.15212/ijafr-2022-0003IJAFR
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The objective of this experiment was to investigate the effect of feeding strategy on milk production, composition and selected processability parameters in the initial stages of lactation. Twenty Holstein Friesian cows were allocated to one of two dietary treatments (n = 10; 7 multiparous and 3 primiparous) in a randomised complete block design for 21 d from day 10 to day 31 post-calving. Treatment 1 (pasture-based system (PBS]) was a pasture/pasture silage-based diet where cows were offered ad libitum grazed pasture or pasture silage (when weather did not permit grazing) plus 3 kg DM/d or 5 kg DM/d concentrate supplementation, respectively. On average, cows grazed pasture for 7.5 d and were fed pasture silage indoors for 13.5 d. Treatment 2 (TMR) was a total mixed ration (TMR) diet made up of concentrate, plus maize silage, pasture silage, beet pulp, soya bean meal and straw. Multiparous cows were blocked on calving date and balanced for parity and milk yield. Primiparous cows were balanced for live weight. Milk attributes pertinent to composition and functionality (e.g., fatty acids and rennet coagulation time (RCT]) were examined over a 21-d experimental period from day 10 to day 31 post-calving. Cows offered PBS tended to have a lower test day milk yield (PBS = 24.2 kg/cow vs. TMR = 26.8 kg/cow, P = 0.09) and a greater milk urea nitrogen (MUN) content compared to TMR (PBS = 0.030 g/100 g milk vs. TMR = 0.013 g/100 g milk, P < 0.001). Most notably, PBS-derived milks had a greater (P < 0.001) concentration of cis-9 trans-11 conjugated linoleic acid (CLA) compared to TMR. In conclusion, milk produced during early lactation from both feeding strategies was suitable for processing. Feeding a TMR compared with ad libitum pasture/pasture silage had no impact on average milk pH, casein concentration or RCT. Cows fed a pasture/pasture silage-based diet produced milk with a desirable RCT for milk processing, while the higher MUN content from cows offered PBS did not impact the processability of milk. Furthermore, milk from cows offered PBS had greater concentrations of cis-9 trans-11 CLA, which may offer human health benefits.
引用
收藏
页码:1 / 14
页数:14
相关论文
共 69 条
[41]   RELATIONSHIPS BETWEEN SUBCLINICAL KETOSIS, MILK-PRODUCTION AND FERTILITY IN FINNISH DAIRY-CATTLE [J].
MIETTINEN, PVA ;
SETALA, JJ .
PREVENTIVE VETERINARY MEDICINE, 1993, 17 (1-2) :1-8
[42]  
Nir O, 2003, ACTA VET SCAND, P21
[43]   Scientific appraisal of the Irish grass-based milk production system as a sustainable source of premium quality milk and dairy products [J].
O'Brien, B. ;
Hennessy, D. .
IRISH JOURNAL OF AGRICULTURAL AND FOOD RESEARCH, 2017, 56 (01) :120-129
[44]   Effects of stocking density and concentrate supplementation of grazing dairy cows on milk production, composition and processing characteristics [J].
O'Brien, B ;
Dillon, P ;
Murphy, JJ ;
Mehra, RK ;
Guinee, TP ;
Connolly, JF ;
Kelly, A ;
Joyce, P .
JOURNAL OF DAIRY RESEARCH, 1999, 66 (02) :165-176
[45]   A national methodology to quantify the diet of grazing dairy cows [J].
O'Brien, D. ;
Moran, B. ;
Shalloo, L. .
JOURNAL OF DAIRY SCIENCE, 2018, 101 (09) :8595-8604
[46]   A case study of the carbon footprint of milk from high-performing confinement and grass-based dairy farms [J].
O'Brien, D. ;
Capper, J. L. ;
Garnsworthy, P. C. ;
Grainger, C. ;
Shalloo, L. .
JOURNAL OF DAIRY SCIENCE, 2014, 97 (03) :1835-1851
[47]   Quality characteristics, chemical composition, and sensory properties of butter from cows on pasture versus indoor feeding systems [J].
O'Callaghan, Tom F. ;
Faulkner, Hope ;
McAuliffe, Stephen ;
O'Sullivan, Maurice G. ;
Hennessy, Deirdre ;
Dillon, Pat ;
Kilcawley, Kieran N. ;
Stanton, Catherine ;
Ross, R. Paul .
JOURNAL OF DAIRY SCIENCE, 2016, 99 (12) :9441-9460
[48]   Effect of pasture versus indoor feeding systems on raw milk composition and quality over an entire lactation [J].
O'Callaghan, Tom F. ;
Hennessy, Deirdre ;
McAuliffe, Stephen ;
Kilcawley, Kieran N. ;
O'Donovan, Michael ;
Dillon, Pat ;
Ross, R. Paul ;
Stanton, Catherine .
JOURNAL OF DAIRY SCIENCE, 2016, 99 (12) :9424-9440
[49]  
OBrien B, 1996, IRISH J AGR FOOD RES, V35, P113
[50]   Effect of altering the daily herbage allowance in mid lactation on the composition and processing characteristics of bovine milk [J].
OBrien, B ;
Murphy, JJ ;
Connolly, JF ;
Mehra, R ;
Guinee, TP ;
Stakelum, G .
JOURNAL OF DAIRY RESEARCH, 1997, 64 (04) :621-626