The Effect of a Teaser Bull on the Return to Oestrus of Postpartum Spring Calving Suckler Cows

The successful re-breeding of suckler and dairy cows is vital to the economics of farming cattle. The gestation length of cows is 280-290 days, so the optimum interval after calving for the subsequent mating is 75-85 days if a 365 day calving interval is to be achieved. Average calving rates to a given service are of the order of 0.5 to 0.6 (Diskin and Sreenan, 1980). Most practical management strategies allow cows to be mated during a 7-10 week period (giving 3 or 4 opportunities to show oestrus). The chance of conception improves with each oestrus cycle following calving, so the earlier a cow begins to show oestrus activity after calving the more likely she is to be successfully mated, because the early, less fertile oestrus cycles, are likely to happen before the planned mating period.

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Associations between early lactation milk protein concentrations and the intervals to calving for Holstein cows of differing parity

Animal Production Science ◽

10.1071/an15777 ◽

2017 ◽

Vol 57 (10) ◽

pp. 2100 ◽

Cited By ~ 3

Author(s):

Jack Fahey ◽

John M. Morton ◽

Martin J. Auldist ◽

Keith L. Macmillan

Keyword(s):

Dairy Cows ◽

Reproductive Performance ◽

Milk Protein ◽

Holstein Cows ◽

Breeding Period ◽

Gestation Length ◽

Calving Interval ◽

Early Lactation ◽

Average Interval ◽

Lactating Dairy Cows

High milk protein concentrations (MP%) have been positively associated with the reproductive performance of lactating dairy cows. No studies have measured the effects of this association on subsequent calving dates in multiparous cows, nor assessed whether the underlying causal mechanisms are present in nulliparous heifers. Holstein cows (primiparous = 918; multiparous = 4242) were selected from herds that had seasonally concentrated calving patterns resulting from seasonally restricted breeding periods. In seasonally calving herds, the date of a herd’s planned start of calving (PSC date) is the average gestation length of 282 days after the date that the preceding breeding period commenced, so that the interval from the herd’s PSC date to each cow’s actual calving date (PSC-to-calving interval) primarily reflects the time to conception from the start of the breeding period in the previous year. This measure was used to compare associations between the average MP% during the first 120 days of lactation and time to the calving that initiated that lactation in primiparous and multiparous cows. Early lactation MP% was negatively associated with PSC-to-calving interval. A 1% difference in MP% was associated with an 8-day difference in the average PSC-to-calving interval in primiparous cows and a 31–35-day difference in the average interval in multiparous cows. The observed associations between early lactation MP% and PSC-to-calving interval are likely to involve determinants present during a cow’s breeding period that affect the probability of conception. Some of these determinants are not restricted to early lactation as the association between MP% and PSC-to-calving interval in primiparous cows is a reflection of the reproductive performance in nulliparous heifers at ~15 months of age.

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Productive And Reproductive Performance Of Indigenous And Crossbred Cattle In Comilla District

Bangladesh Journal of Animal Science ◽

10.3329/bjas.v37i1.9866 ◽

1970 ◽

Vol 37 (1) ◽

pp. 39-43 ◽

Cited By ~ 1

Author(s):

MK Uddin ◽

A Wadud ◽

D Begum ◽

MSR Siddiki ◽

MH Rashid

Keyword(s):

Dairy Cows ◽

Milk Production ◽

Milk Yield ◽

Reproductive Performance ◽

Short Range ◽

Gestation Length ◽

Calving Interval ◽

Crossbred Cattle ◽

Lactation Length ◽

Crossbred Cow

This study was conducted to compare the productive and reproductive performance of indigenous and crossbred cow likely Friesian, Sahiwal and Sindhi cross. A total of 180 dairy cows were selected randomly from four upazilas of Comilla district. It was observed that mean milk yield and lactation length of indigenous, Friesian cross, Sahiwal cross and Sindhi cross were 2.35±0.04, 7.36±0.11, 4.78±0.08 and 4.03±0.05 litre/day and 218.22±8.35, 284.69±1.64, 251.77±3.66 and 259.77±4.91 days respectively. It reveals that the Friesian cross is the best performer in relation to milk production and lactation length. About the reproductive performances it shows that indigenous cows need minimum (1.81±0.048) services per conception. Gestation length was shorter in case of Sahiwal cross (277.64±1.99 days) and it varies within Friesian and Sindhi cross in a short range (278.77±1.38 to 279.31±1.00 days). Calving interval was lower in Friesian crosses (413.77±53.87 days) than its counterparts. Age at puberty was shorter in Friesian cross (662.44±2.52 days). It interprets that Friesian cross was the best performer than other crossbred and indigenous cows in dairy potentialities. DOI: http://dx.doi.org/10.3329/bjas.v37i1.9866 BJAS 2008; 37(1): 39-43

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Productive and reproductive performance of crossbred and indigenous Dairy cows under rural conditions in Comilla, Bangladesh

University Journal of Zoology Rajshahi University ◽

10.3329/ujzru.v26i0.702 ◽

1970 ◽

Vol 26 ◽

pp. 67-70 ◽

Cited By ~ 2

Author(s):

Omar Faruk Miazi ◽

Md Emran Hossain ◽

Mohammad Mahmudul Hassan

Keyword(s):

Dairy Cows ◽

Reproductive Performance ◽

Gestation Length ◽

Calving Interval ◽

Local Breed ◽

Lactation Length ◽

Heat Period ◽

Daily Milk Production ◽

And Performance ◽

Daily Milk

A comparative account of the productive and reproductive performance of crossbred and indigenous dairy cows at some selected areas of Comilla district. The survey was conducted on 50 dairy cows for a period of four months from June to September, 2004. Out of 50 cows 25 were crossbred and 25 were indigenous. Results showed that the average daily milk production of Local, Shahiwal x Local, Friesian x Local and Jersey x Local dairy cows was 2.26±0.19, 4.9±0.95, 6.0±1.0 and 5.71±0.87 liter respectively. The average age of calving interval and lactation length of the crossbred and indigenous cows did not differ significantly (P>0.05). However, the average age at puberty of Shahiwal x Local, Friesian x Local and Jersey x Local was significantly (P<0.01) lower than the local breed. The crossbred cows had significantly (P<0.01) lower pubertal age than local. The postpartum heat period and service per conception of different crossbred and local cows did not differ significantly (P>0.05). The average gestation length of Local, Shahiwal x Local, Friesian x Local and Jersey x Local was 289.88±1.44, 285.0±0.0, 285.0±4.18, and 282.08±2.42 days respectively. The productive and reproductive performance of Friesian x Local cows was superior to the rest of the breeds under study. Key words: Dairy cows, indigenous, crossbred, production, reproduction and performance Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 67-70

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Dietary preference of dairy cows grazing grass and clover

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200597038 ◽

1998 ◽

Vol 1998 ◽

pp. 51-51

Author(s):

S.M. Rutter ◽

R.J. Orr ◽

P.D. Penning ◽

N.H. Yarrow ◽

R.A. Champion ◽

...

Keyword(s):

Dairy Cows ◽

Nutrient Intake ◽

Management Strategies ◽

Grazing Management ◽

Considerable Progress ◽

Dietary Preference ◽

Domestic Ruminants ◽

Factors Influencing ◽

Lactating Dairy Cows ◽

Grazing Sheep

The development of grazing management strategies to optimise nutrient intake from grazed herbage requires an understanding of the factors influencing the dietary preference of grazing domestic ruminants. Although there has been considerable progress in understanding the factors influencing the dietary preference of grazing sheep, there has been comparatively little research with lactating dairy cows (Rutter et al., 1997). The aim of the experiment reported here was to study the dietary preference of lactating dairy cows grazing grass and clover.

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Reproductivity, Productivity and Management System of Indigenous Buffalo (Bubalus bubalis) Cows in Costal Areas of Pirojpur and Borguna District of Bangladesh

Progressive Agriculture ◽

10.3329/pa.v24i1-2.19113 ◽

2014 ◽

Vol 24 (1-2) ◽

pp. 117-122 ◽

Cited By ~ 3

Author(s):

MR Karim ◽

MZ Hossain ◽

MR Islam ◽

MS Parvin ◽

MA Matin

Keyword(s):

Birth Weight ◽

Milk Yield ◽

Management System ◽

Post Partum ◽

Bubalus Bubalis ◽

Gestation Length ◽

Calving Interval ◽

Lactation Length ◽

Daily Milk Yield ◽

Daily Milk

Twenty five buffalo cows of Mothbaria Upazila of Pirojpur district and another twenty five indigenous buffalo cows of Pathorghata Upazila of Borguna district of Bangladesh were randomly selected and interviewed to collect data on reproductivity (gestation length, birth weight, age of first calving, post partum heat and calving interval), productivity (lactation length and daily milk yield) and management system (general management, housing, feeding, calf rearing and treatment facilities) of indigenous buffalo cows using pre-tested questionnaire during the period from January to June 2010. The reproductive parameters including gestation length, birth weight, age of first calving, post partum heat and calving interval of Mothbaria Upazila of Pirojpur district were 319.56 ± 5.93 days, 24.28 ± 4 kilograms, 50.88 ± 1.71 months, 153.6 ± 6.13 days, 547.92 ± 10.88 days respectively whereas in case of Pathorghata Upazila of Borguna district these parameters were 319.12 ± 4.69 days, 24.12 ± 3.6 kilograms, 51 ± 1.8 months, 153.44 ± 6.78 days, 547.24 ± 14.32 days respectively. The productive parameters including lactation length and daily milk yield of Mothbaria Upazila of Pirojpur district were 286.12 ± 11.27 days and 3.33 ± 0.68 liters/day respectively while in case of Pathorghata Upazila of Borguna district these parameters 290.44 ± 10.92 days and 3.43 ± 0.744 liters/day respectively. So, reproduction and production are almost regular comparing with other published reports with the exception of age of first calving which is almost 12 months later than the buffaloes of other countries. It could be concluded that the buffalo owners of these areas do not follow any scientific method of buffalo husbandry; they just follow traditional rearing system. The farmers mostly use buffaloes for draught purpose in these costal areas.DOI: http://dx.doi.org/10.3329/pa.v24i1-2.19113 Progress. Agric. 24(1&2): 117 - 122, 2013

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Effect of heat stress on milk production and its composition of Holstein Friesian crossbred dairy cows

Asian Journal of Medical and Biological Research ◽

10.3329/ajmbr.v2i2.29060 ◽

2016 ◽

Vol 2 (2) ◽

pp. 190-195 ◽

Cited By ~ 1

Author(s):

Mahmud Al Reyad ◽

Md Abid Hasan Sarker ◽

Md Elias Uddin ◽

Raihan Habib ◽

Md Harun Ur Rashid

Keyword(s):

Heat Stress ◽

Dairy Cows ◽

Milk Yield ◽

Management Practices ◽

Management Strategies ◽

Dairy Farm ◽

Milk Composition ◽

Mustard Oil ◽

Holstein Friesian ◽

Significant Difference

The aim of this research was to observe the effect of heat stress on milk yield and milk compositions of Holstein Friesian crossbred (HF) dairy cows. To fulfill the objectives, a total of 9 Holstein Friesian crossbred cows were selected for this study. Green grasses (German, Para) were supplied adlibitum and concentrate feeds (mixture of wheat bran, rice polish, mustard oil cake, di-calcium phosphate and salt) were supplied at the rate of 2.0 kg/day/cow. Management practices for all the cows were similar following the BAU Dairy farm practices. Data were collected on milk yield (l/h/d), relative humidity (%) and barn temperature (0C). The obtained temperature humidity index (THI) of July, August, September and October were 84.95, 81.99, 81.40 and 79.57, respectively. The highest THI was found in July which indicated higher heat stress during this month. A significant difference (p<0.05) in milk yield of cows was found among different months of July to October. The highest milk yield (6.10±0.50 l/h/d) was found in October among observed months. The compositions of milk such as total solids (TS), solids-not-fat (SNF), fat, protein, lactose, and ash also differed significantly (p<0.01). The highest values (%) of TS, SNF, fat, protein, lactose and ash content of milk were found in October as 12.63, 8.80, 3.83, 3.69, 4.39 and 0.72, respectively and lowest values (%) were in July as 12.20, 8.50, 3.71, 3.50, 4.30 and 0.69, respectively due to the high THI value. From these results, it is concluded that heat stress has strong effect on milk yield and milk composition of HF cows in Bangladesh. Management strategies are needed to minimize heat stress and attain optimal dairy animal performance.Asian J. Med. Biol. Res. June 2016, 2(2): 190-195

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Impact Of Genotypes And Parity On Reproductive And Productive Attributes In Dairy Cattle Of Natore District, Bangladesh

Journal of Life and Earth Science ◽

10.3329/jles.v6i0.9727 ◽

1970 ◽

Vol 6 ◽

pp. 91-96

Author(s):

M Saiful Islam ◽

Susanta Kumar Kundu

Keyword(s):

Dairy Cattle ◽

Dairy Cows ◽

Milk Yield ◽

Dairy Farms ◽

Gestation Length ◽

Overall Performance ◽

Daily Milk Yield ◽

Better Than ◽

Daily Milk ◽

Smallholder Dairy Farms

Impact of genotypes and parity on some vital reproductive and productive attributes in the local (L×L, n = 100) and four crossbred cows (L×F, L×SL, L×JR and L×S; n = 318) raised in randomly selected smallholder dairy farms scattered all over Natore District and adjacent areas have been assessed during a period from September 2007 to June 2010. With regard to reproductive attributes, significant differences existed among the cattle genotypes (P<0.05) except for gestation length (GL) and age at weaning (AW). The lowest age at puberty (AP) was found for L×F (21.42±0.37 months), while the highest for L×L (31.67±0.74 months). In terms of productivity, L×F cows produced the highest daily milk yield (DMY; 6.22±0.13 L), coupled with the highest total lactation yield (TLY; 2163.43±47.77 L), while L×L produced the lowest values (1.49±0.04 L and 416.40±12.3 L, respectively) for the traits. The effect of parity on both reproductive and productive attributes showed that the middle-aged dairy cows of the 3rd and 4th parities performed better than the younger (1st and 2nd parities) or the older (5th and beyond) ones. Considering the overall performance, the L×F cows could be ranked as the best genotype followed by their L×SL, L×JR, L×S and L×L counterparts in the study area. DOI: http://dx.doi.org/10.3329/jles.v6i0.9727 JLES 2011 6: 91-96

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The Analysis of Reproduction in Population of the Slovak Spotted Dairy Cows

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201967061419 ◽

2019 ◽

Vol 67 (6) ◽

pp. 1419-1426

Author(s):

Jozef Bujko ◽

Juraj Candrák ◽

Peter Strapák ◽

Július Žitný ◽

Cyril Hrnčár ◽

...

Keyword(s):

Dairy Cows ◽

Fixed Effects ◽

Linear Models ◽

Correlation Coefficients ◽

Calving Interval ◽

Factors Affecting ◽

Actual Computation ◽

Reproduction Traits ◽

Days Open ◽

Basic Statistical Analysis

The aim of study was to analyse the reproduction and factors affecting on reproduction traits of dairy cows in population of Slovak Spotted cattle from 2007 to 2016 the results for 37,274 dairy cows: days to first service (DFS), days open (DO), number of inseminations per conception (NIC), age of first calving (AFC) and calving interval (CI). The basic statistical analysis were analysed using the SAS version 9.3. For the actual computation a linear models with fixed effects was used: For the actual computation a linear models with fixed effects was used: yijklm = μ + HYSi + BTj+ Fk+ Bl +eijklm. The linear model represents coefficients determination R2 = 0.452117% (P < 0.001) for DFS, R2 = 0.377715% (P < 0.001) for DO, R2 = 0.348442% (P < 0.001) for NIC and R2 = 0.317128% (P < 0.001) for CI with all fixed effects. Correlation coefficients among DFS with DO, NIC, AFC and CI were r = 0.37275, r = -0.06881, r = 0.06493 and r = 0.08348. These coefficients were highly statistically significant (P < 0.001).

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Investigation of Effective Factors on Calving Interval of Cows in Faryab Province

International Journal for Research in Applied Sciences and Biotechnology ◽

10.31033/ijrasb.8.2.8 ◽

2021 ◽

Vol 8 (2) ◽

pp. 63-68

Author(s):

Saifullah Saadat

Keyword(s):

Dairy Cows ◽

Reproductive System ◽

Research Area ◽

General Purpose ◽

Point Of View ◽

Economic Losses ◽

Meat Production ◽

Calving Interval ◽

Effective Factors ◽

Inadequate Nutrition

This research was conducted to investigate the effects of factors (Identification of female cows, timely insemination of identified begging cows, diseases related to the reproductive system and nutrition) on the calving interval of dairy cows in Faryab province. Whereas, the long interval between two deliveries due to the identification of female cows, the increase in the number of inseminations (due to the failure of previous insemination), poor nutritional management and genital infections cause a long interval between calving to retrieval of cows. In that case, it will significantly reduce milk production and livestock income, because calving interval is one of the most important indicators of reproduction and economic characteristics of dairy cows, which is the interval between two calving intervals. Under the best of circumstances, one cow gives birth to only one calf per year. Calves born are important from both the point of view of meat production and replacement of old and low-producing cows. Identifying the effective factors and their effects on the calving interval between dairy cows and preventing the economic losses of dairy farmers due to increasing the calving interval between calves are the general purpose of this research. In this research, Andkhoy, Qurghan and other Faryab districts were randomly selected from three villages in each district and 10 owners from each village, which included three districts, 9 villages and nine livestock, respectively. The results of the present research showed that the interval between calving of dairy cows in the research area was due to the untimely identification of female cows by herders, increasing the number of inseminations due to the failure of previous inseminations of diseases related to the reproductive system and inadequate nutrition. The average time after delivery for the uterus to return to its previous state was 465 days.

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