scholarly journals The effect of some environmental factors that affecting daily milk yield of Iraqi buffaloes in Ninewah

2012 ◽  
Vol 36 (2) ◽  
pp. 180-186
Author(s):  
Garabed A. Avadesian
Keyword(s):  
Milk Yield ◽  
Fixed Effects ◽  
Regression Coefficient ◽  
Heritability Estimate ◽  
Prediction Equation ◽  
Temperature Data ◽  
Maximum Temperature ◽  
Stage Of Lactation ◽  
Daily Milk Yield ◽  
Daily Milk

This study was carried out on the local buffalo in Ninewah, data were collected from154 buffalo in two herds during the period 1/7/2010 until 18/7/2010 in which milk collected daily in sequence ( 1st day , 5th day , 9th day , 13th day and 17th day ) and recording maximum and minimum temperature .Data were analyzed using general linear model ( GLM) within SAS program to study the fixed effects ( parity , herd , stage of lactation and test day ) , and regression coefficient with heritability . Overall average daily milk yield was 9.69 ± 0.12 kg and it appeared that parity , herd and stage of lactation has a highly significant effects in daily milk yield , while test day recorded no significant effect in the above . Minimum temperatures ranged (23.5 – 27.5 °C) and maximum was (41.8 – 45.6 °C). Regression coefficient for daily milk yield on maximum temperature was -0.259 kg / °C on (P > 0.01) and for minimum was 0.0325 kg / °C and this was non - significant, while the prediction equation (ŷ) was:Y^ (max) = 21.121 – 0.259 (X1)Y^ (min) = 8.863 + 0.0325 (X2)The heritability estimate for daily milk yield was ranged between (0.17 – 0.21) for the test day (recording day) , it was concluded that from this a number of fixed effects , and yield was decreased significantly with rising in ambient temperature and the estimates of heritability for daily milk yield belonged to test day was rather low.

scholarly journals Test-day model of daily milk yield prediction across stages of lactation in Egyptian buffaloes

2003 ◽  
Vol 46 (1) ◽  
pp. 35-45 ◽  
Author(s):  
A. A. Amin
Keyword(s):  
Milk Yield ◽  
Prediction Equation ◽  
Total Variance ◽  
Yield Prediction ◽  
Prediction Equations ◽  
Data Set ◽  
Age At First Calving ◽  
Stage Of Lactation ◽  
Daily Milk Yield ◽  
Daily Milk

Abstract. farms in Ismailia region, which exist east of Cairo. Two data sets were considered for analysis of variance according to lactation length. The first data set is TDY of the short lactation (5–10 months: LPS). The 2nd data set is the TDY of the long lactation (LPL > 305 days). Daily milk yield prediction equations were investigated using multiple lactations, separate lactations, and three groups of age at first calving. Polynomial regression functions were fitted to study the effect of stage of lactation on variation in test-day milk yield observations (TDY). Results of the present study showed that the effect of herd (farm, season and year of calving) on variation of TDY were significant and accounted for 35.22% of the total variance for the data set of LPL. Variations in TDY due to the effect of either order of lactation or age at first calving groups were significant and accounted for 8.25% and 13.50%, respectively of the total variance. The overall least-square means of TDY were 5.5 and 7.8 Kg for LPS and LPL, respectively. The highest frequencies of similar TDY observations appeared in the early months across stage of lactation. The peak of the measured TDY obtained among the 4th and the 6th month of lactation of the pooled parity data set. Prediction equation of TDY across days of lactation (Days in Milk:DIM) using pooled parities was as the following: Y = 3.4103 +.0466X − .0004X2 + .00001X3 − 1.03E-8X4 Prediction equation of TDY across months of lactation (Months in Milk:MIM) using pooled parity data set was as the following: Y = 1.9634 + 2.7927X − .8931X2 + .1602X3 − .0138X4. Prediction equations for TDY per parity and for each age at first calving group were computed.

Effect of mineral mixture feeding on milk yield in buffalo

2018 ◽  
Vol 3 (01) ◽  
pp. 84-86
Author(s):  
P. K. Madke ◽  
Devendra Pal ◽  
Satya Prakash ◽  
Anant Kumar
Keyword(s):  
Milk Yield ◽  
Uttar Pradesh ◽  
Control Group ◽  
Stage Of Lactation ◽  
Total Milk ◽  
Mineral Mixture ◽  
Continuous Feeding ◽  
Daily Milk Yield ◽  
And Control ◽  
Daily Milk

A field study was conducted in Ghaziabad District to observe the effect of mineral mixture feeding on milk yield in Buffalo. Animals were selected randomly from 5 villages of Ghaziabad, Uttar Pradesh viz. Muradnagar, Noorpur, Kanoja, Kusalia, and Badka. 20 Buffaloes were selected in their 2nd and 3rd stage of lactation and divided into two groups of 10 animals each. First group (T) was fed with 60 gm mineral mixture daily till 90 days of lactation. Other groups (C) of 10 animals were not fed additional mineral mixture, which is farmers practice in that particular area. The farmers were not fed scientific method of feeding. They could not added proper quantity of mineral mixture in balance ration. To keeping in mind a trial was conducted in Ghaziabad District since 2016-17 to 2017-18. Milk yield of these animals was recorded by their owners and these values were averaged for fortnightly interval. Milk production parameters like average daily milk yield, peak yield and total milk yield were compared between treatment and control groups. It was observed that average daily milk yield, peak yield and total milk yield were found significantly (P less than 0.05) higher by 11.04, 12.37 and 11.61% in mineral mixture fed group than control group. On the basis of this, it is recommended that continuous feeding of mineral mixture bettered performance of milk yield in buffaloes.

Factors Affecting Milk Yield and Composition of Indigenous Balkan Goat Breed Reared in Semi Extensive Conditions

2019 ◽  
Author(s):  
Božidarka . ◽  
Marković . ◽  
M Marković ◽  
Dušica . ◽  
Radonjić . ◽  
...  
Keyword(s):  
Milk Yield ◽  
Random Effect ◽  
Production Traits ◽  
Goat Breed ◽  
Factors Affecting ◽  
Stage Of Lactation ◽  
Two Factors ◽  
Genetic And Environmental Factors ◽  
Daily Milk Yield ◽  
Daily Milk

The aim of this study was to analyze effect of genetic and environmental factors on milk production traits of indigenous Balkan goat breed. The average milk yield of 150.43 kg in lactation that lasted 211.09 days was significantly influenced by flock and lactation, while average daily milk yield (0.724 kg) was additional significantly affected by stage of lactation (PÂ0.001). Variability of milk components content (fat, protein and solid nonfat – SNF) was under significant effect of flock and stage of lactation, interaction of these two factors and random effect of animal (PÂ0.001), while strain and lactation did not have significant effect on these traits (P>0.05). Goats of AA genotype of alpha S1 casein had significantly higher fat, protein and SNF content than AF and FF genotype. These results provide important data that could be used as baseline for design of breeding program for improvement of production traits of Balkan goat breed.

Accuracy of alternative methods of estimating weekly yields of milk fat and protein

1984 ◽  
Vol 24 (127) ◽  
pp. 464 ◽  
Author(s):  
T Clarke ◽  
A McGowan
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Low Frequency ◽  
Sampling Frequency ◽  
Alternative Methods ◽  
Stage Of Lactation ◽  
Fat Yield ◽  
Daily Milk Yield ◽  
Daily Milk

Thirty-four procedures were used to estimate the weekly yields of milk, milk fat and milk protein of 19 grazing cows on five occasions between the third and eighth months of lactation. The standard deviation of daily milk yield, fat and protein percentage of individual cows averaged 1 .3 litres, 0.58% fat and 0 - 10% protein, respectively. The four factors involved were: sampling frequency, sampling distribution, basis of compositing subsamples for compositional analyses, and the use of total weekly yields or milk yields on day(s) of sampling, for estimating yields of fat and protein. There were no substantial interactions between the 34 procedures and stage of lactation. The average difference between the estimate of weekly milk yield from any one day's yield and the true weekly milk yield (accuracy) was 7.2 litres/week. The equivalent values for fat and protein yields were 0.59 and 0.22 kg/week. When sampling frequency and measurement of milk yield was increased from one to six days per week, the accuracy of the weekly estimate of milk yield (MY) improved by 5.7 litres/week and that of fat yield (FY) by 0.49 kg/week. If total weekly milk yield was used to estimate fat yield, instead of using milk yield on days of testing only, the improvement in accuracy ranged from 0. 15 to 0.03 kg/week for one and six samplings, respectively. Two equally spaced sampling days gave a marginally better (0.74 litres/week) estimate of milk yield than two consecutive days but a marginally poorer (0.10 kg/week) estimate of fat yield. Yield weighting of subsamples for fat or protein analyses did not improve the estimate of fat yield. As the day to day variation in level of protein in the milk was low, frequency and method of sampling for protein analysis was not important but the accuracy of estimating milk yield had a large effect on estimated weekly protein yield.

Lactational characteristics of imported British Friesian cattle in Western Nigeria

1978 ◽  
Vol 91 (3) ◽  
pp. 645-651 ◽  
Author(s):  
J. A. Adeneye ◽  
Adetowun K. Adebanjo
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Dry Period ◽  
Stage Of Lactation ◽  
Small Peak ◽  
Lactation Length ◽  
Lifetime Number ◽  
Daily Milk Yield ◽  
Friesian Cattle ◽  
Daily Milk

SummaryDuring the period 1962–73, the majority of the 92 lactations of imported British Friesian animals were initiated during the dry season (October–March). The following average values were obtained: lifetime number of lactations, 4·5; lifetime milk production, 9392 kg; age at producing first live calf, 39·6 months; milk yield of nine lactations, 2159 kg; lactation length, 336·5 days; daily milk yield, 6·3 kg; 305-day milk yield, 2012 kg; dry period, 173 days.Milk production was highest in the fourth lactation when the animals averaged 7 years old. Differences in milk yield among lactations were small. Peak daily milk yield was greatest in the third lactation and was reached within the first 21 days of each of the first four lactations. A second but lower peak with the highest milk production persistencies at a later stage of lactation apparently depended on feed availability. The 305-day milk yield was reasonably predicted from the 100- and 200-day yields.Lactations subsequent to abortions and stillbirths were slightly longer, gave less milk (P > 0·05) and were followed by longer dry periods than those initiated by normal births.

scholarly journals Effects of lactation number and different stage of lactation on milk yield of Indigenous and Crossbred cows in Bangladesh

1970 ◽  
Vol 1 (1) ◽  
pp. 31-34
Author(s):  
S Ahmad ◽  
FMA Hossain ◽  
N Islam
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Natural Sciences ◽  
Crossbred Cows ◽  
Stage Of Lactation ◽  
Significant Difference ◽  
The Mean ◽  
Daily Milk Yield ◽  
Daily Milk

A total of 54 samples were collected from 18 milking cows from which nine were indigenous and nine were crossbred to evaluate the effects of different lactation number and different stage of lactation on the milk yield. The average daily milk yield of indigenous and crossbred cows at 1st, 2nd and 3rd lactation were 1.311, 1.633, 2.072 and 8.917, 9.567, 10.167 liter/day/cow respectively and represented the significant difference (p<0.01) within the daily milk yield of different lactations. Milk yield increased gradually from 1st to 3rd lactation. The highest milk yield was recorded in 3rd lactation and lowest was in 1st. The mean milk yield of indigenous and crossbred cows at early, middle & later stages of lactations were 1.617, 2.094, 1.306 and 9.389, 10.222, 9.039 liter/cow/day respectively that revealed stages of lactation had significant effect (p<0.01) on milk yield per day. It was observed that milk yield decreased after 2nd stage of lactation and decreased linearly up to the end of lactation. The highest milk yield was recorded in 2nd stage of lactation and lowest was in 3rd stage of lactation. The overall milk production in different lactation for indigenous cows was 1.672 liter/day and for crossbred cows was 9.550 liter/day that may be concluded as crossbred cows are superior to indigenous in concern of milk yield.Keywords: Indigenous cows; crossbred cows; lactation number; stage of lactation; milk yield.DOI: http://dx.doi.org/10.3329/ijns.v1i1.8614 International Journal of Natural Sciences (2011), 1(1):31-34 

A note on regional variations in the seasonality of milk production in dairy cattle

1981 ◽  
Vol 32 (1) ◽  
pp. 105-108 ◽  
Author(s):  
P. D. P. Wood
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Seasonal Variations ◽  
Protein Concentration ◽  
Total Yield ◽  
Seasonal Fluctuation ◽  
Stage Of Lactation ◽  
Daily Milk Yield ◽  
Daily Milk

ABSTRACTMean daily milk yield, fat concentration and protein concentration in the milk of 579 303 British Friesian, 6 608 Shorthorn, 27 374 Ayrshire, 19 529 Jersey and 19 760 Guernsey cattle were recorded monthly from August 1978 to July 1979 inclusive, and classified by breed, parity, stage of lactation, and five geographical areas according to the location of the herd. Parameters of the function Y(n) = anbecn were estimated for each breed/parity/area group for yield, fat concentration and protein concentration (b and c describe the shape of the curve, a is a scalar, n the week of lactation and e the base of natural logarithms). Systematic deviations from the function were associated with the season of production, reflecting the spring and summer flush of milk yield. Fat and protein concentrations also exhibited seasonal variations from the underlying curve. After correction for the seasonal fluctuation in production, there was no variation in total yield, fat concentration or protein concentration associated with the month of calving.

scholarly journals Milk yield of West African Dwarf sheep as affected by udder stimulation, stage of lactation and parity

2021 ◽  
Vol 41 (2) ◽  
pp. 71-80
Author(s):  
T. J. Williams ◽  
I. J. James ◽  
D. A. Adekoya ◽  
M. R. Abdulateef ◽  
L. O. Onabegun ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Milk Yield ◽  
West African ◽  
Stage Of Lactation ◽  
Left And Right ◽  
Daily Milk Yield ◽  
Late Stages ◽  
Daily Milk ◽  
West African Dwarf Sheep ◽  
Dwarf Sheep

This study was conducted to investigate the milk yield of West African Dwarf sheep as affected by udder stimulation, stage of lactation and parity. The study involves 12 matured lactating ewes weighing between 16 and 24 kg live weights in a semi intensive system of management. For udder stimulation, the animals were divided into 2 groups; 6 animals were stimulated by massaging, cleaning and drying the udder for 2 minutes before milking while the other 6 were not stimulated, the udder were just milked. Stage of lactation was divided into 4; early, mid, late, and very late respectively with 3weeks interval for all the animals. 4 animals were on first parity while 8 animals were on second parity. The animals were allowed to graze on an established paddock consisting of Stylosanthes hamata, Panicum maximum, Pennisetum purpureum etc. for 5 hours and then supplemented with concentrate (17% CP at 5% body weight). Each quarter of the udder was hand milked unilaterally twice per week at 8.00am for 12 weeks. The result of the study showed that daily milk yield in each of the quarter of the udder (left and right) was not significantly (P>0.05) different. Udder stimulation and stage of lactation had significant (P<0.05) effect on daily milk yield while parity and mammary gland position (left and right ) did not significantly affect daily milk yield. The interaction between udder stimulation and stage of lactation as well as interaction between udder stimulation and parity had significant (P><0.05) effect on daily milk yield in WAD sheep. Therefore it is recommended that sheep udder be stimulated at late and very late stages of lactation to enhance milk production. ><0.05) effect on daily milk yield while parity and mammary gland position (left and right ) did not significantly affect daily milk yield. The interaction between udder stimulation and stage of lactation as well as interaction between udder stimulation and parity had significant (P<0.05) effect on daily milk yield in WAD sheep. Therefore it is recommended that sheep udder be stimulated at late and very late stages of lactation to enhance milk production.

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