scholarly journals Effect of live weight of beef cows on calf production efficiency

2020 ◽  
Vol 9 (9) ◽  
pp. e679007632
Author(s):  
Ricardo Zambarda Vaz ◽  
José Fernando Piva Lobato ◽  
João Restle ◽  
Pablo Tavares Costa ◽  
Otoniel Geter Lauz Ferreira ◽  
...  
Keyword(s):  
Milk Yield ◽  
Reproductive Performance ◽  
Production Efficiency ◽  
Live Weight ◽  
Beef Cows ◽  
Pregnancy Rates ◽  
Production Performance ◽  
Calving Interval ◽  
Body Weights ◽  
Total Milk

The objective was to evaluate the development and reproductive performance of beef cows of different body weights at calving were evaluated. Milk yield and calf production efficiency were assessed in secundiparous Braford cows classified at calving according to weight as Light (325.2±3.7 kg), Moderate (347.7±4.0 kg), and Heavy (384.2±4.1 kg). Heavy cows had higher total milk yield than Light cows, but did not differ from Moderate, reflecting in calves weighing at weaning 82.1, 76.6, and 76.9 kg, respectively. Differences on pregnancy rates for Light (90.0%, 18 pregnant cows/2 of eligible cows), Moderate (70.2%, 12 pregnant cows/5 of eligible cows), and Heavy (62.5%, 10 pregnant cows/6 of eligible cows) were not detected. Light cows were more productive and efficient when production performance was adjusted for the pregnancy rates than Moderate and Heavy cows. Production of kilograms of calves adjusted for pregnancy was 20.5, 16.2±0.5, and 14.0±0.5 kg for the Light, Moderate, and Heavy cows, respectively. Heavy and Moderate cows were less efficient as compared with the Light ones for production of calves adjusted for their calving interval. Light cows produce more kilograms of calf/cow, requiring the same amount of milk to produce one kilogram of calf. Light cows also have higher efficiency converting milk into calf weight than Moderate and Heavy cows. The productivity and efficiency of breeding herds should be evaluated by the combination of pregnancy rate and kilograms of weaned calves per cow exposed to breeding.

Production characteristics of the Jamaica Hope breed of dairy cattle

1970 ◽  
Vol 74 (3) ◽  
pp. 463-468 ◽  
Author(s):  
K. E. Wellington ◽  
P. Mahadevan ◽  
K. L. Roache
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Production Performance ◽  
Tropical Environment ◽  
Calving Interval ◽  
Considerable Potential ◽  
Production Characteristics

SUMMARYThis study is the first comprehensive estimation of breed parameters for the Jamaica Hope breed of dairy cattle. It has shown that the breed has considerable potential for milk production undser good husbendry in a tropical environment. Improvements in reproductive performance may be achieved, without prejudice to production performance, by using milk yield per day of calving interval (which has a moderatoly high repestability) as a criterion for selection.

Genetic analysis of milk production efficiency traits in Jersey crossbred cattle

2015 ◽  
Author(s):  
Poonam Ratwan ◽  
Ajoy Mandal ◽  
Manoj Kumar ◽  
A. K. Chakravarty
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Production Efficiency ◽  
Random Effect ◽  
Calving Interval ◽  
Crossbred Cattle ◽  
Genetic Progress ◽  
Lactation Length ◽  
Total Milk ◽  
Eastern Regional

Present study was carried out with the aim to determine the effect of genetic and non-genetic factors on milk production efficiency traits and their genetic control. Data on milk production efficiency traits i.e. total milk yield per day of lactation length and total milk yield per day of calving interval in Jersey crossbred animals maintained at organized herd of ICARNational Dairy Research Institute, Eastern Regional Station, Kalyani, Nadia, West Bengal spread over 29 years (1986-2014) were analyzed in the study. The overall least-squares means of total milk yield per day of lactation length and total milk yield per day of calving interval were estimated as 6.97±0.21 and 6.02±0.23 kg/day, respectively. The data was grouped into different sub-classes of season of calving, period of calving, parity and genetic group of animals. The random effect of sire had shown significant (p<0.01) influence on milk production efficiency traits. Various environment factors significantly affected the milk production efficiency traits indicating the scope of improvement in management of these crossbred animals. The heritability estimates of 0.54 for TMY/LL and 0.63 for TMY/CI were high in magnitude which suggests that fast genetic progress can be made, if these animals are selected based on the milk production efficiency traits.

scholarly journals Comparison of body weight and reproduction performance in cows of various beef breeds managed under equal conditions in West Pomerania

2008 ◽  
Vol 51 (4) ◽  
pp. 318-328 ◽  
Author(s):  
R. Pilarczyk ◽  
J. Wójcik
Keyword(s):  
Body Weight ◽  
Reproductive Performance ◽  
Beef Cows ◽  
The Body ◽  
Calving Interval ◽  
Calving Ease ◽  
Body Weights ◽  
Red Angus ◽  
Calving Difficulty ◽  
Calving Intervals

Abstract. The aim of the study was to compare the body weight and the parameters of reproductive performance in beef cows of various breeds following their import to Poland from 1995–1997. The analyses included cows of five beef breeds: Red Angus, Salers, Hereford, Limousin and Simmental. We have compared the body weights and calving intervals during the period from their arrival to Poland in 1995 until 2002, with subsequent calvings included in the analyses. Other aspects included calving difficulty, abortions, stillbirths and twin births. The analysis of the cows’ reproductive performance has revealed that the studied breeds differ in the calving interval. Best results were achieved by Simmental and Limousine cows, while Red Angus cows exhibited the poorest performance. The effect of subsequent calving on the calving interval was also confirmed. We have observed no differences among the mature cows with respect to the body weight and calving ease.

Effects of rearing regime on body size, reproductive performance and milk production during the first lactation in high genetic merit dairy herd replacements

2002 ◽  
Vol 74 (3) ◽  
pp. 553-565 ◽  
Author(s):  
A. F. Carson ◽  
L. E. R. Dawson ◽  
M. A. McCoy ◽  
D. J. Kilpatrick ◽  
F. J. Gordon
Keyword(s):  
Body Size ◽  
Milk Production ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Milk Fat ◽  
Live Weight ◽  
Calving Interval ◽  
Genetic Merit ◽  
Holstein Friesian ◽  
Condition Score

AbstractOne hundred and thirteen high genetic merit Holstein-Friesian heifers were used in a study to determine the effect of rearing regime, in terms of diet offered and target calving weight, on body size, reproductive performance and milk production in high genetic merit heifers. Eighty of the heifers were supplied from 11 commercial farms, the remainder were supplied from the herd at the Agricultural Research Institute of Northern Ireland. The heifers commenced the experiment at 7 weeks of age when they were allocated on the basis of source, live weight and genetic merit to one of four rearing regimes. The target weights at calving were 540 kg (treatment 1) and 620 kg (treatments 2, 3 and 4). Treatment 1 heifers were offered grass silage-based diets during the winter and grass-based diets during the summer. Treatment 2 heifers were offered the same forage base plus additional concentrate supplementation. Treatment 3 heifers were offered a straw/concentrate diet during the winter and grass-based diets during the summer. Treatment 4 heifers received the same diets as treatment 3, except for the first summer period when they remained housed and were offered a straw/concentrate diet. The heifers were mated at 14 months of age and were returned to the 11 source farms one month prior to calving. Heifers reared on treatment 1 had a lower withers height (P < 0·001) and were of a lower condition score (P < 0·001) before calving than heifers reared on treatments 2, 3 and 4. During early lactation (3 months post calving) heifers reared on treatment 1 lost less weight and condition score than the heifers reared on the other treatments. Thus at the end of the first lactation live weights did not differ significantly between the treatments. However, body length remained shorter (P < 0·01) in treatment 1 compared with treatments 2, 3 and 4. First lactation milk yield (305 days) was lower for heifers reared on treatment 1 (7222 l) compared with heifers reared on treatment 2 (8020 l) (P < 0·01), 3 (7956 l) (P < 0·01) and 4 (7901 l) (P < 0·05). Similarly, milk fat plus protein yield was lower (P < 0·05) for heifers reared on treatment 1 (511 kg) compared with treatments 2 (544 kg), 3 (544 kg) and 4 (554 kg). The interval from calving to first recorded oestrus was shorter in treatment 1 compared with treatments 2 and 3 (P < 0·05). There was a tendency (P < 0·10) for heifers reared on treatment 1 to have a shorter calving interval (394 days) compared with treatments 2 (426 days), 3 (435 days) and 4 (458 days). In conclusion increasing the live weight of Holstein-Friesian heifers at first calving from 540 to 620 kg pre-calving increased milk yield proportionally by 0·11 but tended to increase the calving interval. Diet type during the rearing period had no effect on milk fat plus protein yield or reproductive performance.

scholarly journals Influence of lactation order and live weight on milk yield and fertility traits in domestic Balkan goat

2010 ◽  
Vol 26 (3-4) ◽  
pp. 179-185
Author(s):  
N. Memisi ◽  
M. Zujovic ◽  
Z. Tomic ◽  
M.P. Petrovic
Keyword(s):  
Body Weight ◽  
Milk Yield ◽  
Live Weight ◽  
Significant Difference ◽  
Body Weights ◽  
Total Milk ◽  
One Year ◽  
Fertility Traits

The goal of investigation in the domestic Balkan goat was to establish the effect of body weight and lactation number on milk yield and fertility. Research was done in herds belonging to private farmers, during a one-year period, on a total of 578 goats. Investigated herds were monitored also by lactation number, i.e. kidding number (lactations 1,2 and 3 individually, lactation 4 and following lactations investigated together). Body weight and milk yield were measured, while fertility was determined as the number of live born kids per 100 goats. Goats were also sorted into groups by age and body weight, while the interval within groups and between groups was 5 kg. Average total milk yield in the investigated population of the domestic Balkan goat was 177.5 kg. A statististically significant difference (P<0,01) was established for milk yield depending on body weight and age, except for goats in lactation 1 (P<0,05). In lactation 3 and 4, goats with body weights over 45 kg, comprising 30.23% of the total number in these groups, had the highest milk yields (over 200 kg). Pertaining to lactation number, i.e. kidding number, as well as body weight in both years of investigation, lowest fertility was found in lactations 1 and 2 (112%), and in goats with lowest body weight (25-30 kg), while this considerably increased lactation 4 and later lactations (136%), and body weights of over 40 kg (140%).

scholarly journals The Comparison of Milk and Reproductive Performance of Saanen and Saanen × Hair Goat Crossbreds (F1, B1 & B2) and Growth Performance of their Kids in Semi-Intensive Production System

2019 ◽  
Vol 7 (6) ◽  
pp. 871
Author(s):  
Mesut Yıldırır ◽  
Orhan Karadağ ◽  
Mustafa Yilmaz ◽  
Mehmet Akif Yüksel ◽  
Tamer Sezenler ◽  
...  
Keyword(s):  
Birth Weight ◽  
Growth Performance ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Production System ◽  
Dry Matter ◽  
Live Weight ◽  
Dry Matter Content ◽  
Weaning Weight ◽  
Intensive Production

The aims of this study were to evaluate the traits of reproductive, milking and growth performance of Saanen and Saanen × Hair crossbreds (F1, B1 and B2) raised at the Bandırma Sheep Research Institute. The data were collected from 868 goats for reproductive performance and milk yield and from 1077 kids for survival performance between 2009-2012. Milk components (fat, protein, lactose and non-fat dry matter) of goats (n=162) and body weight changes of kid’s (n=64) were evaluated for one year in 2012. Estrus rates and survival rates were similar among all genotypes. Kidding rate was significantly higher in F1 goats than Saanen goats. Saanen goat had the lowest average mean daily milk yield compared with other genotypes. The effect of year and age were significant on milk yield. Goats in F1 and B1 genotypes had higher milk protein percentage and non-fat dry matter content in comparison with Saanen and B2 genotype. Milk fat and lactose contents were similar among genotypes. Birth weight and monthly live weight were similar between genotypes while weaning weight, six month live weight and yearling live weight were higher in B1 kids in comparison with Saanen kids. The effect of dam age and birth type were significant on birth weight, monthly live weight and weaning weight. The findings related to performance characteristics in goat genotypes investigated show that B1 genotype could be recommend for semi-intensive production system in the Western Anatolia.

scholarly journals Fertility parameters in German dairy herds: Associations with milk yield and herd size

2019 ◽  
Vol 64 (No. 11) ◽  
pp. 459-464
Author(s):  
Jörn Rethmeier ◽  
Michael Wenzlau ◽  
Martin Wagner ◽  
Steffi Wiedemann ◽  
Lisa Bachmann
Keyword(s):  
Pregnancy Rate ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Dairy Farms ◽  
Herd Size ◽  
Pregnancy Rates ◽  
Conception Rate ◽  
Service Rate ◽  
Dairy Herds ◽  
Key Factor

Fertility in dairy cows has decreased over the last fifty years while milk production per cow has increased. Furthermore, dairy herds become larger resulting in fewer employees per cow, which might also influence reproductive performance. To elucidate the situation in Germany, selected parameters (conception rate, service rate, pregnancy rate, days to first insemination and days open) were studied using data on 148 herds. For statistical analysis the herds were categorized concerning milk yield: (1) &lt; 30 kg, (2) 30‒35 kg, and (3) &gt; 35 kg/cow/day as well as concerning herd size: (1) &lt; 200, (2) 200‒400, (3) 400‒1000 and (4) &gt; 1000 milking cows. There was no difference in conception rate among herds. That means on dairy farms of larger size or with high milk yield the chance of an inseminated cow to become pregnant is the same as in small herds or in herds with low milk yield. Small herds (&lt; 200 cows) had lower pregnancy rates than larger herds (200–400 cows). The pregnancy rate in herds with different milk yield was not statistically different. Though there was a trend that dairy farms with higher milk yield (&gt; 30 kg) had higher pregnancy rates. The statistical differences and trends of pregnancy rates are due to higher service rate in larger herds as well as in herds with high milk yield. Therefore, service rate is the key factor for high reproductive performance on dairy farms. Poor fertility is not associated with high milk yield on herd basis or large herd size but may represent inappropriate farm management.

Milk yield at first lactation, parity, and season of calving affect the reproductive performance of water buffalo cows

2020 ◽  
Vol 60 (8) ◽  
pp. 1073
Author(s):  
Héctor Nava-Trujillo ◽  
Robert Valeris-Chacin ◽  
Armando Quintero-Moreno ◽  
Juan Escalona-Muñoz
Keyword(s):  
Milk Yield ◽  
Reproductive Performance ◽  
Water Buffalo ◽  
Negative Energy ◽  
Calving Interval ◽  
Water Buffaloes ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

Context Profitability of water buffalo systems depends on a calving interval (CI) &lt;400 days. Several factors affect the achievement of this target. However, milk yield at first lactation has received little attention. Aims Determine the effect of milk yield at first lactation, parity, season of calving and farm, on the length of CI and the probability of a CI ≤ 400 days in water buffaloes. Methods A retrospective analysis of milk yield at first lactation and reproductive records of 1459 water buffaloes was carried out. Milk yield was categorised as Group 1 (≤1090 kg), Group 2 (1090–1377 kg), Group 3 (1377–1684 kg) and Group 4 (&gt;1684 kg); parity was categorised as parity 1, 2 and ≥ 3; and month of calving was grouped into three seasons: December–March, April–July, and August–November. Data were analysed using linear and logistic mixed models. Key results CI increased from 425.3 days (95% CI: 418.8–431.8 days) in group 1 to 463.3 days (95% CI: 456–470.6 days) in group 4 (P &lt; 0.05), while the probability of having a CI ≤ 400 days decreased from 0.5 (95% CI: 0.46–0.54) to 0.26 (95% CI: 0.22–0.29), respectively (P &lt; 0.05). CI decreased from 466 days (95% CI: 460.8–471.3 days) in parity 1 to 410.5 days (95% CI: 405.2–415.8 days) in parity ≥3, whereas the probability of a CI ≤ 400 days increased from 0.26 (95% CI: 0.24–0.29) to 0.51 (95% CI: 0.47–0.54) respectively (P &lt; 0.05). Water buffaloes calving in August–November showed significantly shorter CI and, along with those calving between December–March, showed the highest probability of a CI ≤ 400 days. An interaction between milk yield at first lactation and parity on both outcomes was observed. Conclusions Shorter CI and higher probability of a CI &lt;400 days were associated with lower milk yields at first lactation, higher parity and calving between August–November. Higher milk yield at first lactation affected negatively the reproductive performance of water buffaloes, especially at parity 1 and 2. Implications These results highlight the importance of adequate nutritional management to allow water buffaloes to cope with the challenge of the postpartum negative energy balance and have a calving interval less than 400 days.

Effect of housing management on production performance of crossbred cows during hot-humid season

2017 ◽  
Author(s):  
Ranjana Sinha ◽  
Madan Lal Kamboj ◽  
Surendra Singh Lathwal ◽  
Ashish Ranjan
Keyword(s):  
Milk Yield ◽  
System Analysis ◽  
Production Performance ◽  
Housing System ◽  
Maximum Temperature ◽  
Mean Values ◽  
Crossbred Cows ◽  
Comfort Index ◽  
Body Weights ◽  
Daily Milk Yield

Present investigation was carried out to study the effect of modified housing system on production performance of crossbred (Karan-Fries) cows during hot humid seasons. For this study 16 lactating crossbred cows in their early lactation were selected based on parity, milk yield and body weights and randomly divided into two groups (G-I and G-II) with eight animals in each group. G-I group was housed under existing loose housing system and G-II under modified housing system. Analysis revealed that, the maximum temperature and THI were significantly (P less than 0.05) lower in modified shed as compared to existing shed. Percent cow comfort index was significantly (P less than 0.01) higher in G-II (94.25%) group as compared to G-I (72.75%). There was significant (P less than 0.05) differences of dry matter intake and average daily milk yield of cows and higher mean values were recorded in modified shed as compared to existing shed. Highly significant (P less than 0.01) increase in lying time of cows was recorded in modified shed (53.43%) as compared to existing shed (46.51%). It was concluded that the cows housed inside modified shed during hot-humid season were more comfortable and exhibited improved overall production performance as compared to the animals under existing shed.

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