We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Evaluation of Advanced Dairy Systems shade tracker fans and Korral Kool coolers on lactating dairy cattle.
- Authors
Burgos, R; Odens, L. J.; Collier, R. J.; Baumgard, L. H.; VanBaale, M. J.
- Abstract
Two independent trials were conducted during the summer months of June 3rd to September 30th of 2004 and 2005. In each trial 400, multiparous and 100 primiparous Holstein cows balanced for parity, stage of lactation, and milk yield were randomly assigned to 1 of 2 cooling treatments (trts). Individual milk yields and pen DMI were collected daily, respiration rates (RR) and body surface temperatures (ST) were recorded weekly, and milk components, BCS and body weights (BW) were obtained monthly. In 2004, average daily milk production did not differ for multiparous cows housed in ADS-ST or KK (41.8 kg/d) pens. However, daily milk yield for primiparous cows housed under KK conditions tended (P = 0.10) to be higher than cows housed under ADS-ST conditions (37.8 vs. 36.7 kg/d). Multiparous cows cooled with ADS-ST had a higher RR (60.5 vs. 58.3 BPM); however, RR in primiparous cows did not differ between treatments (59.2 ± 0.8 BPM). In 2005, daily milk production for multiparous (42.2 vs. 38.3 kg/d) and primiparous (35.2 vs. 32.7 kg/d) cows housed in KK were higher (P < 0.05) compared to cows housed under ADS-ST pens. Body weight change was similar in 2004 between multiparous cows housed in KK or ADS-ST trts (-0.49 vs. 13.3 kg/d), however primiparous cows housed under KK conditions gained more BW (60.5 vs. 19.9 kg) then heifers housed under ADS-ST. Multiparous (70.9 vs. 59.3 BPM) and primiparous (72.2 vs. 61.3 BPM) cows cooled with ADS-ST had a higher RR. During times of moderate to severe heat stress cows housed under KK cooler out performed those cows housed under ADS-ST fans. During both trials, ADS-ST cooling system used less electricity (526 vs. 723; 2004 and 517 vs. 840; 2005 kwh/d) and water (291 vs. 305 and 290 vs. 460 L/d) than the KK coolers. The daily costs for the ADS-ST and KK system was $27.30 and the KK system was $36.36/d in 2004 and 25.95 vs. $42.06 during the 2005 trial.
- Subjects
LACTATION in cattle; HEIFERS; DAIRY cattle; MILK yield; SHADES &; shadows; SURFACE temperature; BODY weight
- Publication
Journal of Animal Science, 2006, Vol 84, p399
- ISSN
0021-8812
- Publication type
Article