Milk production, nitrogen balance, and fiber digestibility prediction of corn, whole plant grain sorghum, and forage sorghum silages in the dairy cow

The objective was to evaluate the economic efficiency of two groups of cows in a grazing system using a non-traditional estimation strategy. Retrospective data were used corresponding to the lactations of 216 primiparous and multiparous cows of Holstein breed American-Canadian biotype with records of all their productive life, from their incorporation to the system until their sale or death, collected between the years 1992-2012. It was concluded that the economic efficiency of the two groups of cows analyzed is not only determined by milk production, but by a set of additional variables such as longevity and reproduction.

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Differences in the behaviour of high and low yielding dairy cows selected by genetic merit

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200008760 ◽

2002 ◽

Vol 2002 ◽

pp. 220-220 ◽

Cited By ~ 1

Author(s):

M.D. Cooper ◽

D. R. Arney ◽

C. J. C. Phillips

Keyword(s):

Coping Strategies ◽

Dairy Cows ◽

Milk Production ◽

Milk Yield ◽

Dairy Cow ◽

Detrimental Effect ◽

Genetic Merit ◽

High Nutrient

The effects of high milk yields on the behaviour and welfare of the dairy cow are unclear. A high milk yield increases the need to consume sufficient fodder in an attempt to meet high nutrient demands. The failure to meet the demands may result in persistent hunger in the dairy cow having to modify her behaviour by employing various coping strategies. These modifications may help the cow overcome a state of hunger but at the expense of being unable to express other important behaviours. The objective of this study was therefore to determine whether the behaviour and welfare of the genetically high yielding dairy cow is being compromised by the increased nutritional demands of milk production, and to investigate the possibility that an increased amount of time spent in food-directed behaviours may have a detrimental effect on the time available to perform other important behaviours.

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Replacement of soyabean meal by barley or wheat distillers grains for lactating dairy cows

Proceedings of the British Society of Animal Science ◽

10.1017/s175275620000764x ◽

2002 ◽

Vol 2002 ◽

pp. 108-108

Author(s):

J.D. Sutton ◽

D.J. Humphries ◽

R H Phipps ◽

M. Witt

Keyword(s):

Dairy Cows ◽

Milk Production ◽

Dairy Cow ◽

Present Experiment ◽

Distillers Grains ◽

Complete Replacement ◽

Lactating Dairy Cows ◽

Soyabean Meal

The complete replacement of soyabean meal by maize distillers grains (MDG) in dairy cow diets had no significant effects on milk production, rumen digestion or the supply of non-ammonia N to the duodenum (Sutton et al., 2000; Phipps et al., 2001). The present experiment was designed to extend this work by examining the response when barley (BDG) or wheat (WDG) distillers grains replaced soyabean meal.

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The influence of long-term dietary inclusion of the antibiotic Actaplanin on dairy cow performance

Proceedings of the British Society of Animal Production (1972) ◽

10.1017/s0308229600017487 ◽

1988 ◽

Vol 1988 ◽

pp. 110-110

Author(s):

M.M. Abubakar ◽

P. Rowlinson

Keyword(s):

Dairy Cows ◽

Milk Production ◽

Dairy Cow ◽

Milk Fat ◽

Rumen Fluid ◽

Increase Milk Production ◽

Cow Performance ◽

A Performance

The antibiotic Actaplanin is a complex of glycopeptide compounds produced by Actinoplanes missourrensis. When included in feed as a performance enhancer it has been shown to increase milk production of dairy cows (McGuffey et al. 1983). Actaplanin is associated with reduced proportions of acetate and increased proportions of propionate in rumen fluid and a depression in milk fat proportion may result (Clapperton et al. 1987). The aim of the trial reported here was to monitor the effects of feeding 960 mg Actaplanin/head/d to dairy cows throughout two successive lactations.

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