Relationship of milk production, milk expected progeny difference, and calf weaning weight in angus and simmental cow-calf pairs

1992 ◽  
Vol 70 (11) ◽  
pp. 3304-3310 ◽  
Author(s):  
T. T. Marston ◽  
D. D. Simms ◽  
R. R. Schalles ◽  
K. O. Zoellner ◽  
L. C. Martin ◽  
...  
Keyword(s):  
Milk Production ◽  
Weaning Weight ◽  
Cow Calf ◽  
Relationship Of

scholarly journals 108 Impacts of dam age and milk production on cow/calf profitability

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 60-61
Author(s):  
Travis Mulliniks ◽  
Joslyn Beard ◽  
Tasha King
Keyword(s):  
Milk Production ◽  
Production Efficiency ◽  
Retention Rate ◽  
Economic Value ◽  
Beef Cows ◽  
Offspring Performance ◽  
Increase Production Efficiency ◽  
Weaning Weight ◽  
Selection For ◽  
Cow Calf

Abstract Cow herd profitability can be greatly influenced by reproductive success, average age of herd, and genetic potential within the environment. Productivity is influenced by cow age with calf weaning weight, increasing from 2 to 5 yr of age in dams. With that in mind, increasing average age of the cowherd has the potential to increase cow/calf profitability. Culling cows before 5 yr of age negatively impacts production efficiency due to decreased calf weaning weight in younger cows and subsequently, increase replacement rate and costs. Therefore, reproduction in young cattle is important to overall economic efficiency within the cow herd and a driving factor in longevity. Due to decreased reproduction and offspring performance, young females have previously been considered an economic liability. The effect of increased average cow age within the herd along with increased pregnancy rate of young cows has shown to increase production efficiency by decreasing replacement rates and adding greater production potential with increased calf weaning weights. In young beef cows, partitioning nutrients away from lactational demands allows for nutrients to be utilized for cow growth and reproduction. An increase in selection for milk production has resulted in beef cows undergoing greater nutritional stress during early lactation, which ultimately reduces cowherd reproduction and efficiency. Although a big emphasis is placed on output traits, economic value of reproduction is 5 times greater than growth or maternal output traits in beef cattle. In addition, the value of the added milk production may not fully be captured, due to extensive environments with limited nutrients. Even in environments with greater feed resources, selection for milk production may led to a decrease in reproduction, production efficiency, and cowherd retention rate.

scholarly journals RELATIONSHIP OF SKIN MEASUREMENTS AND MILK PRODUCTION LEVELS IN CATTLE BREEDS MAINTAINED IN THE TROPICS

2021 ◽  
Vol 4 (2) ◽  
pp. 92-95
Author(s):  
S. F. Amakiri
Keyword(s):  
Hair Follicle ◽  
Milk Production ◽  
Skin Thickness ◽  
Production Potential ◽  
Cattle Breeds ◽  
Positive Linear Correlation ◽  
The Tropics ◽  
Relationship Of ◽  
The Relationship ◽  
Selection Of

The relationship between mean skin thickness or hair follicle depth of the skin from the midside (12th rib) area and milk production levels of pure Friesian (Holstein)cattle breeds, their ¾ and 7/8 crosses with White Fulani zebu, and pure White Fulanis, maintained in South-Western Nigeria were studied. A strongly positive linear correlation (r = 0.9), significant at 1% level was found between skin thickness and hair follicle depth, and milk production levels in these breeds. The results indicate that for cows maintained in a hot humid tropical environment, comparative midside skin thickness and hair follicle depth could be used as indices of the milk production potential of cows. It could be a useful field tool for selection of cows for milk production when considered along with other characteristics

scholarly journals Proteolytische Aktivitäten der lysosomalen Enzyme bei Milchrindern* – 3. Mitteilung: Beziehungen der Energie- und Eiweißversorgung zur lysosomalen Enzymaktivität im Blutplasma beim Milchrind

2000 ◽  
Vol 43 (1) ◽  
pp. 17-26
Author(s):  
L. Panicke ◽  
J. Weingärtner ◽  
M. Schmidt ◽  
T. Król
Keyword(s):  
Enzyme Activity ◽  
Food Intake ◽  
Dairy Cows ◽  
Milk Production ◽  
Lysosomal Enzyme ◽  
Enzyme Activities ◽  
Correlation Coefficients ◽  
Food Ration ◽  
Milk Performance ◽  
Relationship Of

Abstract. Title of the paper: Relationship between lysosomal blood activity and milk content» of urea and protein in different phases of milk production in dairy cows Relationship of lysosomal enzyme activities in blood and supply of energy and protein in dairy cattle were investigated. Closed correlation coefficients were calculated for lysosomal enzyme activity and content of protein and urea in milk. Especially a high or a low content of protein in the food ration affects the lysosomal enzyme activities considerably. A different lysosomal response to equal food supply was gained after deviding the cow stock into different groups regarding performance at a different lactation status. Growth, breed, age, capacity of food intake and milk performance might be influencing factors.

Effects of housing beef cow-calf pairs on drylot or pasture in the Midwest on production parameters and calf behavior through feedlot receiving

2021 ◽  
Author(s):  
Megan E Myerscough ◽  
Lucas T Neira ◽  
Keifer H Sexton ◽  
Lucas S Hofer ◽  
Keela M Trennepohl ◽  
...  
Keyword(s):  
Milk Production ◽  
Treatment Time ◽  
Body Condition Score ◽  
Average Daily Gain ◽  
Beef Cow ◽  
Condition Score ◽  
Ad Libitum ◽  
Cow Calf ◽  
Cow Performance ◽  
And Behavior

Abstract The objectives were to analyze the effects of housing cow-calf pairs in drylots (DL) or pasture (PAST) on cow performance and reproduction as well as calf performance and behavior through feedlot receiving. Simmental × Angus (2 yr; 108/yr; 81 ± 15.3 d postpartum) spring-calving cows were stratified by age, body weight (BW), body condition score (BCS), and calf sex and allotted to 6 groups/yr. Groups were randomly assigned to 1 of 2 treatments: DL or PAST. Cows in DL were limit-fed at maintenance and calves had ad libitum access to the cow diet in an adjacent pen. Pairs on PAST were rotationally grazed and calves received creep ad libitum three weeks prior to weaning. On d 110 calves were fence-line weaned and behavior was observed on d 111 and 112. On d 116 calves were transported 272 kilometers to a feedlot for a 42-d receiving period. Behavior was evaluated again on d 117 and 118. Data were analyzed using the MIXED procedure of SAS except reproductive data which was analyzed using the GLIMMIX procedure. Cows on DL had greater (P ≤ 0.01) BW and BCS at weaning. There were no differences (P ≥ 0.42) detected in reproductive data. Cows on DL had greater (P = 0.02) milk production. Calves on DL had greater BW (P ≤ 0.01) on d 55 and at weaning and greater preweaning average daily gain (ADG). There were treatment × time effects (P = 0.01) for lying and eating on d 111 and 112. More DL calves were eating in the morning and lying in the evening. More (P < 0.01) PAST calves were walking on d 111. Pasture calves vocalized more (P ≤ 0.01) on d 112. On d 117, more (P ≤ 0.05) pasture calves were lying and eating, and DL vocalized more. On d 118, treatment × time and treatment effects were detected (P ≤ 0.02) for lying and walking. More PAST calves were lying and more DL calves were walking. Drylot calves had greater (P ≤ 0.02) BW at the beginning and end of the receiving phase. Pasture calves had greater (P < 0.01) ADG and tended (P = 0.10) to have greater gain efficiency during feedlot receiving phase. In conclusion, housing cow-calf pairs in drylots improved BW, BCS, and milk production of cows but did not affect reproductive performance. Drylot calves had increased BW and ADG during the preweaning phase. Calf behavior at weaning and receiving was influenced by preweaning housing. Pasture calves had improved receiving phase ADG and feed efficiency but were still lighter than drylot calves after 42 d receiving phase.

Relationship of weaning weight to the mature liveweight of cashmere does on Australian farms

2010 ◽  
Vol 50 (6) ◽  
pp. 581 ◽  
Author(s):  
B. A. McGregor ◽  
K. L. Butler
Keyword(s):  
Standard Deviation ◽  
Weaning Weight ◽  
Residual Standard Deviation ◽  
Individual Farm ◽  
Relationship Of

Median weaning weight and its relationship with the median mature liveweight of does was quantified for four commercial Australian cashmere farms in various parts of Australia. Individual liveweights, of does of all ages at the time of weaning in December, ranged from 9 to 61 kg. Individual farm means of adult does (>1 year old) ranged from 24.6 to 38.8 kg. The model for the logarithm of liveweight was: log10(liveweight) = a + br(Age + 0.6); where a, b and r are parameters that are different for each farm. The result that the r parameter differs with farm was statistically significant (P = 9.4 × 10−6). The percentage variance accounted for was 84.4% and the residual standard deviation was 0.042. Farms differed greatly in the median mature liveweight with some farms reaching ~44 kg and others only 31 kg. Median weaning weight was 14.1 kg (range 11.4–16.8 kg). Median weaning weight as a percentage of median mature doe liveweight on a particular farm varied from 32 to 42%. These weaning weights appear low in absolute and relative terms and thus are likely to incur production penalties.

Relationship of milk production to number of lambs born or suckled

1959 ◽  
Vol 10 (5) ◽  
pp. 720 ◽  
Author(s):  
G Alexander ◽  
HL Davies
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Independent Sets ◽  
Relationship Of

Two independent sets of data, obtained by two different methods of measuring milk production, show that milk yield is greatly influenced by the number of lambs suckled but not by the number of lambs born.

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