Prediction of 305-day lactation milk yield based on bimonthly test day values in Karan Fries cattle

Kokate, L.S.; Singh, Avtar; Banu, Rashia; Gandhi, R. S.; Chakravarty, A. K.; Gupta, A. K.; Sachdeva, G. K.

doi:10.5958/j.0976-0555.48.2.023

Cited by 8 publications

(6 citation statements)

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“…Similarly, Ibrahim et al (2003) stated the heritability estimates for lactation yields in the mid-lactation have been either the same or slightly lower than those for 305-day yields, although estimates were lower for the beginning and end of lactation. Furthermore, Kokate et al (2014) observed higher estimates of accuracy of prediction in the middle portion of lactation in bimonthly test day milk yields.…”

Section: Discussionmentioning

confidence: 89%

Lactation yield: Interval level comparison of milk records for genetic improvement in Friesian vs Arsi crossbred cows in the highlands of south eastern Ethiopia

Wabe¹,

Asmare²

2015

Ethiop. Vet. J.

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Milk recording intervals was studied by analysing 1220 lactation records of Friesian x Arsi crossbred cows kept in south eastern highlands of Ethiopia. Milk Recording Intervals (MRI) comparison was made at 15, 30 and 45 day's length. Accuracy was measured in terms of percentage difference between actual and estimated yield, Root Mean Square Error (RMSE) and coefficient of determination (R 2 ). The study revealed that 15, 30 and 45-day MRI can estimate lactation yield accurately to extent of less than five percent error. Lactation yield estimated by 15-day MRI was marginally more accurate with higher R 2 (99.6%) and lower RMSE (34.8) values compared to 30 and 45-day MRI. Simple regression analysis indicated that yield of 9'h period (121-135 days) in 15-day; the 5'hperiod (121-150 days) in 30-day and the 3ro period (91-135) in 45-day time interval provided reliable estimate of 305-day yield. The step-wise regression analysis showed that combination of more than three records did not result in increasing the accuracy of estimates. Thus 30 and 45-day MRI can be used in the estimation of lactation yield in Friesian x Arsi crossbred cows.

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Section: Discussionmentioning

confidence: 89%

Lactation yield: Interval level comparison of milk records for genetic improvement in Friesian vs Arsi crossbred cows in the highlands of south eastern Ethiopia

Wabe¹,

Asmare²

2015

Ethiop. Vet. J.

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“…However, slightly higher estimates of accuracy of prediction in the middle portion of lactation in bimonthly test day milk yields were observed. Similarly, Kokate et al (2014) also reported the accuracy of prediction in the middle of lactation to be higher in Karan Fries cattle for bimonthly test day milk yields. The highest correlation was observed amongst eighth monthly milk yield with standard lactation milk yield.…”

Section: Percentage Error =mentioning

confidence: 83%

Development of standard lactation milk yield prediction models using monthly milk yield records in Marathwadi buffalo

Dongre

KOKATE

KHANDAIT

et al. 2018

Indian J of Anim Sci

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“…Season of calving and lactation number did not influence on 305 DMY, TMY, MY/LL, and MY/CI as reported by Nehra and Divya et al . [ 18 , 19 ] while there was report of the significant effect of period of calving on 305 DMY in KF cattle [ 20 ]. However, various important factors (i.e., calving year, calving season, age groups, and parity) affect not only TMY but also the rate of milk production throughout the length of lactation [ 21 ].…”

Section: Discussionmentioning

confidence: 99%

Optimization of dry period in Karan Fries cow

et al. 2016

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Aim:The objective of this study was to optimize dry period (DP) length that can maximize the production across adjacent lactations and overall lifetime yield.Materials and Methods:Performance records with respect to DP spread over a period of 15-year in Karan Fries (KF) cattle maintained at Livestock Research Centre (National Dairy Research Institute), were collected for the study. Data of 681 KF cows were analyzed by least square technique to examine the effect of non-genetic factors on DP. Season of calving was classified into four seasons: Winter season (December-March), summer season (April-June), rainy season (July-September), and autumn season (October-November); period of calving into five periods: 1998-2000 (1-period), 2001-2003 (II-period), 2004-2006 (III-period), 2007-2009 (IV-period), and 2010-2012 (V-period), and parity into six parities, i.e., 1st, 2nd, 3rd, 4th, 5th, and >6th parities to see the effect of non-genetic factors on DP.Results:Period of calving, season of calving, and parity did not affect the DP significantly (p<0.05). The overall least square mean of DP was 67.93±2.12 days. For the optimization of DP with regard to milk productivity, analysis was carried out by class interval method. DP was classified into eight classes (<22, 23-45, 46-67, 68-89, 90-111, 112-133, 134-155, and >156 days), and optimum level was obtained at 46-67 days (3rd class) with the following respective milk yield (MY) of 305 daily MY (4016.44±43.68 kg), total MY (4704.21±61.51 kg), MY per day of lactation length (13.03±0.13 kg), and MY per day of calving interval (11.68±0.41 kg).Conclusion:From the study, it was concluded that this optimal DP length (46-67 days) is suitable for maximizing the production. Hence, one should aim to dry off pregnant cows to achieve a DP of appropriate length to enhance productivity in the next lactation, as very short and very long DP reduces the economic profitability in dairy animals.

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Prediction of 305-day lactation milk yield based on bimonthly test day values in Karan Fries cattle

Cited by 8 publications

References 1 publication

Lactation yield: Interval level comparison of milk records for genetic improvement in Friesian vs Arsi crossbred cows in the highlands of south eastern Ethiopia

Lactation yield: Interval level comparison of milk records for genetic improvement in Friesian vs Arsi crossbred cows in the highlands of south eastern Ethiopia

Development of standard lactation milk yield prediction models using monthly milk yield records in Marathwadi buffalo

Optimization of dry period in Karan Fries cow

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