Miglierina M M, Bonadeo N, Ornstein A M, Becú-Villalobos D, Lacau-Mengido I M
a Escuela MC y ML Inchausti , Universidad Nacional de La Plata , 25 de Mayo, Buenos Aires , Argentina.
b Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires , J. Newbery 261, Junín, Buenos Aires , Argentina.
N Z Vet J. 2018 Jan;66(1):37-40. doi: 10.1080/00480169.2017.1374885. Epub 2017 Sep 20.
To determine the effect of providing water within the area grazed by dairy cows on milk yield and quality, compared to requiring cows to walk to a distant water trough, on a dairy farm in the Pampa region of Argentina during summer.
Holstein dairy cows were allocated to two herds with similar parity, days in milk and milk production. They were grazed in one paddock that was divided in two, with a fixed water trough at one end. Cows were moved twice daily to grazing plots within the paddock. Control cows (n=66) could only access water from the fixed trough, whereas supplemented cows (n=67) also received water from a mobile trough within the grazing plot. Milk production of each cow, and water consumption of the two herds were measured daily over 62 days. Milk composition for each herd was determined weekly from Days 18 to 60 of the study, and grazing behaviour was observed between 08:00 and 16:00 hours on Days 11-15, 19-22 and 39-43.
Over the 62 days of the study, supplemented cows produced 1.39 (SE 0.11) L/cow/day more milk than Control cows (p=0.027). Estimated mean daily water intake was 50.4 (SE 2.1) L/cow/day for supplemented cows and 58.2 (SE 2.7) L/cow/day for Control cows (p=0.004). Percentage total solids in milk was higher for supplemented (12.5 (SE 0.06)%) than Control (12.4 (SE 0.04)%) cows (p=0.047). During the periods of behavioural observation, a higher percentage of cows in the water supplemented than the Control herd were observed in the grazing area (p=0.012).
This preliminary study demonstrated that provision of water to dairy cows within the grazing plot was beneficial for milk production and composition, and may be associated with longer periods spent within the grazing area, during hot weather in the Pampa region of Argentina.
在阿根廷潘帕地区夏季的一个奶牛场，比较在奶牛放牧区域内供水与要求奶牛走到远处水槽饮水对产奶量和奶品质的影响。
将荷斯坦奶牛分配到两个胎次、泌乳天数和产奶量相似的牛群中。它们在一个被分成两半的围场中放牧，围场一端有一个固定水槽。奶牛每天被转移到围场内的放牧区两次。对照组奶牛（n = 66）只能从固定水槽获取水，而补充组奶牛（n = 67）还能从放牧区内的移动水槽获取水。在62天内每天测量每头奶牛的产奶量以及两个牛群的饮水量。在研究的第18天至60天每周测定每个牛群的奶成分，并在第11 - 15天、19 - 22天和39 - 43天的08:00至16:00观察放牧行为。
在研究的62天里，补充组奶牛比对照组奶牛每天多产奶1.39（标准误0.11）升/头（p = 0.027）。补充组奶牛估计平均每日饮水量为50.4（标准误2.1）升/头，对照组奶牛为58.2（标准误2.7）升/头（p = 0.004）。补充组奶牛奶中的总固体百分比（12.5（标准误0.06）%）高于对照组（12.4（标准误0.04）%）奶牛（p = 0.047）。在行为观察期间，观察到补充水的牛群中在放牧区的奶牛百分比高于对照组牛群（p = 0.012）。
这项初步研究表明，在阿根廷潘帕地区炎热天气期间，在放牧区内为奶牛供水对产奶量和奶成分有益，并且可能与在放牧区停留更长时间有关。
