Effect of extended photoperiod on appetite, growth and reproductive endocrinology in red deer stag calves

1995 ◽  
Vol 1995 ◽  
pp. 106-106
Author(s):  
M H Davies ◽  
T J Parkinson ◽  
J A Douthwaite ◽  
D W Deakin
Keyword(s):  
Energy Supply ◽  
Red Deer ◽  
Dietary Energy ◽  
Reproductive Endocrinology ◽  
Grass Silage ◽  
Modifying Effect ◽  
Photoperiod Manipulation

Deer experience a period of reduced appetite and growth in winter which has a major impact on venison supply. Photoperiod manipulation has been shown to modify this. The objective of this experiment was to investigate the effect of extended photoperiod and the modifying effect of dietary energy supply in red deer stag calvesForty red deer stag calves born in May/June 1992 were weaned in mid-September and put indoors on a grass silage-based ration. On 30 September the stag calves were weighed and randomised to four treatments groups on the basis of liveweight.

Effect of extended photoperiod on appetite, growth and reproductive endocrinology in red deer stag calves

1995 ◽  
Vol 1995 ◽  
pp. 106-106
Author(s):  
M H Davies ◽  
T J Parkinson ◽  
J A Douthwaite ◽  
D W Deakin
Keyword(s):  
Energy Supply ◽  
Red Deer ◽  
Dietary Energy ◽  
Reproductive Endocrinology ◽  
Grass Silage ◽  
Modifying Effect ◽  
Photoperiod Manipulation

Deer experience a period of reduced appetite and growth in winter which has a major impact on venison supply. Photoperiod manipulation has been shown to modify this. The objective of this experiment was to investigate the effect of extended photoperiod and the modifying effect of dietary energy supply in red deer stag calvesForty red deer stag calves born in May/June 1992 were weaned in mid-September and put indoors on a grass silage-based ration. On 30 September the stag calves were weighed and randomised to four treatments groups on the basis of liveweight.

Milk production from dairy cows offered a conserved barley/kale bicrop compared to grass silage

1998 ◽  
Vol 1998 ◽  
pp. 24-24 ◽  
Author(s):  
J.M. Moorby ◽  
P.R. Evans ◽  
N.E. Young
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Energy Supply ◽  
Protein Production ◽  
Milk Protein ◽  
Microbial Population ◽  
Grass Silage ◽  
Feed Protein

The efficiency of use of feed protein for milk protein production is very poor, particularly for animals offered conserved forages. Contributing to this is the inefficient capture of rumen degradable N in situations where a readily fermentable energy supply is not available for use by the rumen microbial population. The incorporation of a whole crop cereal into a conserved forage could increase rumen protein efficiency. This experiment was carried out to investigate the milk production of dairy cows offered a conserved forage of a whole crop barley and kale bicrop compared with grass silage, and a mixture of the two.

Nutrition of red deer for meat production

1984 ◽  
Vol 82 (4) ◽  
pp. 231-242 ◽  
Author(s):  
R. N. B. Kay ◽  
J. A. Milne ◽  
W. J. Hamilton
Keyword(s):  
Red Deer ◽  
Day Length ◽  
Meat Production ◽  
Dietary Energy ◽  
Digestive Efficiency ◽  
Productive Activities ◽  
Energy Needs ◽  
Antler Growth ◽  
Good Nutrition ◽  
Wild Deer

SynopsisRed deer are now being farmed for meal production on an intensive scale. They are manageable, adaptable and healthy animals, and. with care and good nutrition, they become far more productive than wild deer.Their digestive efficiency resembles that of sheep. Productive activities caking and lactation, fattening and antler growth occur in summer when food is plentiful and depend on endocrine and metabolic cycles entrained by day length. Dietary energy needs of deer are similar to those of cattle but higher than those of sheep: however, because young deer store little fat, they produce lean meat as efficiently as sheep.Deer produce rich milk: the growth of sucking calves reflects the supply of nutrients available to their dams. In winter, calves benefit from shelter: nonetheless, their growth and appetite decline, even when day length is experimentally lengthened. While good nutrition improves winter growth, this is costly: furthermore, improved winter growth is followed by somewhat poorer growth during the succeeding summer. Slaughter of calves at 6 months of age rather than 16 months may allow greater efficiency of meat production.Deer carry 50%more muscle than sheep, much of it in their well-priced haunch. Cahes deposit little fat until half grown: adults lose their summer fat during the rut and winter. The lean character of venison well matches modern consumer requirements.

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