Influence of high altitude grazing on productive and physiological traits of dairy cows

Zemp, Markus; Blum, J.W.; Leuenberger, Hans; Kuenzi, N.

doi:10.1111/j.1439-0388.1989.tb00243.x

Cited by 12 publications

(20 citation statements)

References 25 publications

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“…The initial increase lasted for 2 (NEFA; only experiment 2) to 3 weeks (BHB). Similar effects have been observed by Zemp et al (1989a), comparing cows grazing at high altitude with a control group remaining on lowland pasture. The particular conditions of high altitude grazing increase energy requirements considerably.…”

Section: Effects Of High Altitude Pasturingsupporting

confidence: 62%

“…Accordingly, adaptation in the glucose-related parameters (plasma glucose, insulin and blood lactate) were rapid. In contrast, there was a long-term reduction in plasma glucose and insulin in cows and steers exposed to high altitude pasture in the studies of Bossart et al (1985) as well as Zemp et al (1989a).…”

Section: Effects Of High Altitude Pasturingmentioning

confidence: 69%

“…According to the present data, it required about 1 week until other adaptive mechanisms replaced the T 3 and T 4 effects to sustain body temperature at low ambient temperatures. Zemp et al (1989a) also noted no effects on thyroid hormone levels of high altitude sojourn when blood samples were obtained after 2 weeks of an alpine environment. After 12 weeks of high altitude pasture, thyroid hormone concentrations in steers were even lower than in a corresponding lowland control group (Bossart et al, 1985).…”

Section: Effects Of High Altitude Pasturingmentioning

confidence: 99%

“…The few results on the effects of high altitude pasture on food consumption and milk yield (cf. Zemp et al, 1989b;Christen et ah, 1996) suggest a limited adaptability of lactating cows to high altitude conditions. Zemp et al (1989a) found indications of an increased risk of metabolic disorders of cows at high altitude compared with lowland pastured cows, although blood samples were not obtained before 2 weeks after transport.…”

Section: Introductionmentioning

confidence: 99%

“…Zemp et al, 1989b;Christen et ah, 1996) suggest a limited adaptability of lactating cows to high altitude conditions. Zemp et al (1989a) found indications of an increased risk of metabolic disorders of cows at high altitude compared with lowland pastured cows, although blood samples were not obtained before 2 weeks after transport. The aim of the present study was to follow the evolution of metabolite and hormone profiles in early-lactating cows by frequent measurements before, during and after transport from lowland to high altitude sojourn.…”

Section: Introductionmentioning

confidence: 99%

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Metabolic response of early-lactating cows exposed to transport and high altitude grazing conditions

et al. 1998

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Section: Effects Of High Altitude Pasturingsupporting

confidence: 62%

Section: Effects Of High Altitude Pasturingmentioning

confidence: 69%

Section: Effects Of High Altitude Pasturingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metabolic response of early-lactating cows exposed to transport and high altitude grazing conditions

et al. 1998

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Hair cortisol levels in dairy cows from winter housing to summer highland grazing

et al. 2011

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Protein composition, plasmin activity and cheesemaking properties of cows' milk produced at two altitudes from hay of lowland and high-alpine origins

Leiber¹,

Nigg²,

Kunz³

et al. 2005

Journal of Dairy Research

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The influence of high altitude, alpine origin of the forage and roughage-only diets on milk protein content and composition, plasmin activity and cheesemaking properties was investigated. There were four treatment groups, each consisting of six dairy cows in early to mid-lactation. Two groups were fed only with hay ad libitum either at 2000 m or at 400 m a.s.l. One group, kept in the lowlands, was pair-fed to the alpine-site group and another group received a mixed diet of silages, hay and concentrates. Two hay types, harvested either at the alpine site or in the lowlands, were offered to all cows fed with hay alone, following a change-over design in three periods each of 3 weeks. In the respective third week, milk was sampled at every milking. Hay of alpine origin significantly reduced milk protein, in particular whey proteins, which is why the casein number increased. κ-Casein proportion in total casein was reduced and its glycosylation was increased by the alpine hay. The apparent plasminogen-derived activity was reduced when alpine hay was given, but apparent plasmin activity and rennet coagulation properties of the milk were not affected by hay type. Independent of hay type, the high altitude group showed a significantly reduced milk protein content, lower glycosylation of κ-casein and impaired rennet coagulation properties. For several of the traits, the trend was the same in the pair-fed group. There was no effect of altitude on apparent plasmin activity. Hay-alone v. the mixed diet resulted initially in marked declines in milk protein content but did not impair cheesemaking properties. Thus the extensive diet without concentrates, typical of high-alpine conditions, contributed less to the overall effect of extensive alpine v. intensive lowland feeding systems than hay quality and altitude did. In conclusion, certain positive influences of the alpine sojourn of cows on cheese processing quality are overruled by the major adverse impact of lower milk protein content.

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Influence of high altitude grazing on productive and physiological traits of dairy cows

Cited by 12 publications

References 25 publications

Metabolic response of early-lactating cows exposed to transport and high altitude grazing conditions

Metabolic response of early-lactating cows exposed to transport and high altitude grazing conditions

Hair cortisol levels in dairy cows from winter housing to summer highland grazing

Protein composition, plasmin activity and cheesemaking properties of cows' milk produced at two altitudes from hay of lowland and high-alpine origins

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