scholarly journals Effect of season, genotype and lactation on milk yield and composition of local and crossbred dairy cows reared under different feed base region

2016 ◽  
Vol 19 (1-2) ◽  
pp. 50-65
Author(s):  
MA Baset ◽  
KS Huque ◽  
NR Sarker ◽  
MM Hossain ◽  
MN Islam
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Block Design ◽  
Milk Composition ◽  
Base Region ◽  
Total Solids ◽  
Randomized Block Design ◽  
Daily Milk Yield ◽  
Daily Milk

A total of 160 cows, 10 cows in each of native (local cow) and crossbred (local × Holstein Friesian) origins differing in lactation were used in 2×2×2×2 factorial experiment using Randomized Block Design (RBD) to evaluate milk yield and composition of cows considering regions (good & poor feed base region), seasons (dry: Nov.–Feb. 2009 & wet: Jun.–Oct. 2009), genotypes and lactation. A “good and/or poor feed base” region was classified based on the availability of quantity and quality roughages throughout the year. The study revealed that the daily milk yield and 4% FCM of cows under good feed base condition were 6.76 and 6.49 kg, respectively and under poor feed base condition were 3.67 and 3.31 kg, respectively. Feed base region did not affect on milk fat and it was observed that the milk protein, lactose, solids-not-fat (SNF), minerals and total solids under good feed base condition were 37.9, 54.9, 100.9, 6.3 and 140.6 g/kg, respectively, whereas, under poor feed base condition the values were 36.3, 52.9, 98.0, 6.1 and 135.2 g/kg, respectively. Season did not affect milk yield and composition except minerals (6.5 g/kg vs. 5.9 g/kg). Genotypes significantly (p?0.01) influenced daily milk yield, the milk protein and minerals. Lactation did not affect milk yield and the milk protein, but influenced the fat, lactose, SNF, minerals and total solids. The interaction of feed base regions and seasons significantly (p?0.01) influenced milk yield and the milk fat and SNF. The milk protein and lactose was influenced by the interaction of feed bases region, seasons and lactation. Milk yield negatively correlated with fat per cent. The percentage of fat significantly (p?0.01) correlated with protein, lactose, SNF, and minerals %. The percentage protein correlated with lactose, SNF and minerals. Lactose % significantly (p?0.01) correlated with SNF%. It may be concluded that milk yield and composition depends on feed base region, genotype and lactation of cows. Season did not influence milk yield and the composition. Milk yield negatively correlated with the percentage of fat, protein, lactose, SNF and milk composition strongly correlated with each other.Bangladesh J. of Livestock Res. 19(1-2): 50-65, Jan-Dec 2012

scholarly journals The effect of spring shearing on milk yield and milk composition in Tsigai ewes

2011 ◽  
Vol 27 (2) ◽  
pp. 241-249
Author(s):  
Y. Aleksiev
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Milk Composition ◽  
Daily Output ◽  
Lactose Concentration ◽  
Nutrient Partitioning ◽  
The Mean ◽  
Daily Milk Yield ◽  
Daily Milk

Milk yield and milk composition responses to shearing were assessed in Tsigai ewes kept indoors. Sheep was offered 700g/head daily concentrate and chopped hay administered ad libitum and was milked twice daily - at 08:00 and at 18:00 h. Average for the two weeks post-shearing, daily milk yield dropped by 7.2 % due to the 8.2 and 2.2 %, respectively, reduction in the morning and in the afternoon milk yields. Fat and protein concentrations in the morning and in the afternoon milk on day 1, day 7 and day 14 after shearing surpassed vastly pre-shearing values whilst milk lactose concentration showed a trend towards postshearing reduction. On the three sampling post-shearing days daily output of different milk constituents exceeded the corresponding mean pre-shearing values by 16.2, 11.6 and 9.1 % in milk fat, 1.6, 3.5 and 6.2 % in milk protein, and 4.1, 7.2 and 2.2 % in total solids. The increase in daily output of milk constituents occurred despite the decline in daily milk yield. Lactose daily output, on the contrary, dropped by 6.9, 7.7 and 9.3 % relative to the mean pre- shearing value. Postshearing adaptive adjustments including changes in nutrient partitioning appear to underlie the alterations in milk yield and milk composition. It may be concluded that post-shearing changes in milk composition makes for the improvement of milk processing characteristics.

scholarly journals Betaine Improves Milk Yield in Grazing Dairy Cows Supplemented with Concentrates at High Temperatures

Animals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 57 ◽  
Author(s):  
Frank Dunshea ◽  
Kehinde Oluboyede ◽  
Kristy DiGiacomo ◽  
Brian Leury ◽  
Jeremy Cottrell
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
The Mean ◽  
Fat Yield ◽  
Grazing Dairy Cows ◽  
Daily Milk Yield ◽  
Betaine Supplementation ◽  
Daily Milk

Betaine is an organic osmolyte sourced from sugar beet that accumulates in plant cells undergoing osmotic stress. Since the accumulation of betaine lowers the energy requirements of animals and, therefore, metabolic heat production, the aim of this experiment was to investigate if betaine supplementation improved milk yield in grazing dairy cows in summer. One hundred and eighteen Friesian × Holstein cows were paired on days in milk and, within each pair, randomly allocated to a containing treatment of either 0 or 2 g/kg natural betaine in their concentrate ration for approximately 3 weeks during February/March 2015 (summer in Australia). The mean maximum February temperature was 30 °C. Cows were allocated approximately 14 kg dry matter pasture and 7.5 kg of concentrate pellets (fed in the milking shed) per cow per day and were milked through an automatic milking system three times per day. Betaine supplementation increased average daily milk yield by over 6% (22.0 vs. 23.4 kg/day, p < 0.001) with the response increasing as the study progressed as indicated by the interaction (p < 0.001) between betaine and day. Milk fat % (p = 0.87), milk protein % (p = 0.90), and milk somatic cell count (p = 0.81) were unchanged by dietary betaine. However, betaine supplementation increased milk protein yield (677 vs. 719 g/day, p < 0.001) and fat yield (874 vs. 922 g/day, p < 0.001) with responses again being more pronounced as the study progressed. In conclusion, dietary betaine supplementation increased milk and component yield during summer in grazing dairy cows.

Milk yield and milk composition from grazing primiparous non-dairy crossbred ewes

2006 ◽  
Vol 57 (4) ◽  
pp. 377 ◽  
Author(s):  
J. E. Morgan ◽  
N. M. Fogarty ◽  
S. Nielsen ◽  
A. R. Gilmour
Keyword(s):  
Weight Gain ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Total Yield ◽  
Milk Composition ◽  
Ewe Lambs ◽  
Daily Milk Yield ◽  
Sire Breed ◽  
Daily Milk

Milk production and milk composition were studied in 520 primiparous Merino crossbred ewes that were the progeny of 30 sires from several maternal crossing breeds including Border Leicester, Coopworth, Finnsheep and East Friesian. The ewes were born in 3 years (1997, 1998, and 1999), with 3 sires used in every year to provide genetic links. The crossbred ewe lambs were randomly assigned to autumn or spring joining groups and mated to Poll Dorset rams to lamb at 12 or 19 months of age. Ewes were milked on 3 days during their first lactation at approximately 3, 4, and 12 weeks after lambing. On each milking day, each ewe was initially injected with oxytocin, milked out by machine, and then hand-stripped. This procedure was repeated approximately 4 h later, with the milk weight and time recorded to extrapolate to daily milk yield, and composition of the milk was determined. Daily milk yield was analysed using REML mixed models procedures and 3 measures of milk production were predicted: peak milk yield at 21 days of lactation, total milk yield from 21 to 90 days of lactation, and length of lactation (days for daily yield to decline to 600 g/day). Milk composition traits (%fat, %protein, %lactose) and proportion of machine milk yield were analysed with similar models. Sire breed, number of lambs born and suckled, season, and ewe weight gain from mid-pregnancy until lamb weaning were all significant (P < 0.01) for daily yield, which declined from 2.1 kg/day at 21 days to 0.7 kg/day at 90 days of lactation. The Finnsheep-cross ewes had lower peak milk yield (1.84 ± 0.08 v. 2.09–2.19 ± 0.1 kg/day) and lower total yield of lactation (21–90 days) than all the other breed-cross ewes (78 ± 3 v. 92–107 ± 5 kg). The East Friesian-cross ewes had significantly longer lactations (128.8 ± 10.9 days) than the Border Leicester (98.1 ± 4.4 days) and Coopworth (93.7 ± 4.2 days), with the Finnsheep-cross ewes the shortest (80.1 ± 3.1 days). The East Friesian-cross ewes had the greatest and the Finnsheep-cross ewes the least total yield of lactation (107 ± 5 and 78 ± 3 kg, respectively). There were significant differences in peak milk yield for ewes bearing and suckling single lambs, twin-born and single-raised lambs, and twin-born and raised lambs (1.86 ± 0.04, 2.03 ± 0.09, and 2.37 ± 0.07 kg/day, respectively). There was a significant decline in daily milk yield with increasing ewe weight gain from mid-pregnancy to lamb weaning (–18.1 ± 4.2 g/kg). All the components of milk composition changed from the peak of milk production at 3 weeks to the end of lactation. The East Friesian-cross ewes had significantly lower milk %fat (by approx. 1 percentage point) at both 21 days and 90 days of lactation than ewes by all other sire breeds. The 30 sire progeny mean deviations for daily milk yield ranged from –292 to +276 g/day, with considerable ranges between sires within the sire breeds. The implications for lamb production and breeding programs are discussed.

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.

scholarly journals The comparison of the lactation and milk yield and composition of selected breeds of sheep and goats

2017 ◽  
Vol 1 (4) ◽  
pp. 498-506 ◽  
Author(s):  
M. M. Ferro ◽  
L. O. Tedeschi ◽  
A. S. Atzori
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Energy Content ◽  
Milk Composition ◽  
Random Coefficients ◽  
Total Solids ◽  
Sheep Breeds ◽  
The World

Abstract The objective of this study was to characterize the milk yield (MY) and milk composition of relevant sheep and goat breeds raised around the world to be used with nutrition models for diet formulation and nutrient balancing. A 2-step approach was used. First, a database developed by the Food and Agriculture Organization was used to identify relevant breeds (i.e., frequently raised) by comparing the occurrence of transboundary breed names across countries. We selected transboundary breeds that occurred more than 3 times and other relevant breeds obtained from the specialized literature that had milk production information (e.g., MY, days in milk, and milk fat, protein, and lactose). The majority of sheep breeds were classified as nondairy (76%) because they lacked milk production information. Karakul and Merino accounted for up to 2.4% of sheep breeds raised around the world, whereas the other individual breeds accounted for less than 1%. In contrast, nondairy breeds of goats accounted for 46.3% and of the remaining 53.7%, Saanen, Boer, Anglo-Nubian, Toggenburg, and Alpine accounted for 6.5, 5, 4.4, 4, and 3%, respectively, of the transboundary breeds. Second, a database compiled from published studies for the selected sheep (n = 65) and goats (n = 78) breeds were analyzed using a random coefficients model (studies and treatments within studies as random effects). For sheep breeds, the average and SD were 1.1 ± 0.3 kg/d for MY, 6.9 ± 1% for milk fat, 5.4 ± 0.4% for milk protein, 5 ± 0.3% for milk lactose, 17.7 ± 1.4% for milk total solids, and 1,073 ± 91 kcal/kg of milk energy. Lacaune had the greatest MY compared to Comisana and Tsigai (1.65 versus 0.83 and 0.62 kg/d; respectively, P &lt; 0.05), but milk components were not different among breeds. For goats breeds, the average and SD across breeds were 1.7 ± 0.6 kg/d for MY, 4.2 ± 0.9% for milk fat, 3.3 ± 0.4% for milk protein, 4.4 ± 0.4% for milk lactose, 12.7 ± 1.1% for milk total solids, and 750 ± 75 kcal/kg of milk energy. Alpine had similar MY to Saanen (2.66 versus 2.55 kg/d, respectively; P &gt; 0.05), but greater (P &lt; 0.05) than other breeds. The Boer breed had the greatest milk fat, protein, lactose, and total solids than several other breeds, leading to the greatest milk energy content (907 kcal/kg). Because there are many factors that can alter MY and milk composition, averages provided in this study serve as guidelines, and nutritionists must obtain observed values when using nutrition models.

Genetic analysis of milk production and composition in crossbred ewes from different maternal genotypes

2009 ◽  
Vol 49 (1) ◽  
pp. 24 ◽  
Author(s):  
R. A. Afolayan ◽  
N. M. Fogarty ◽  
J. E. Morgan ◽  
G. M. Gaunt ◽  
L. J. Cummins ◽  
...  
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Genetic Correlations ◽  
Milk Composition ◽  
The Other ◽  
Separate Analysis ◽  
Daily Milk Yield ◽  
Sire Breed ◽  
Daily Milk

Milk production and milk composition were measured in 1056 crossbred ewes managed under pasture grazing in a lamb production system. Most ewes were milked on three occasions at ~3, 4 and 12 weeks of lactation. The ewes were the progeny of mainly Merino dams and 91 sires from several maternal crossing breeds including Border Leicester, East Friesian, Finnsheep and Coopworth. The ewes were born over 3 years and run at three sites where they were joined naturally to meat rams. Most of the ewes were first parity (autumn-joined at 7 months of age and spring-joined at 14–17 months of age), with the remainder second or third parity. The cohorts of ewes and sites were linked genetically by three common maternal sires. The 4-h oxytocin-induced milking procedure was used to estimate daily milk production and milk samples were analysed for composition (fat%, protein% and lactose%). Daily milk yield and milk composition traits were analysed using restricted maximum likelihood mixed models procedures. The sire breed of crossbred ewes was significant for milk yield (P < 0.01), fat% (P < 0.01) and lactose% (P < 0.05). There was a significant (P < 0.01) interaction of sire breed × days of lactation, mainly due to the relatively higher milk yield of the East Friesian and White Suffolk cross ewes compared with the other crosses, at the end of the lactation. The East Friesian cross ewes had lower milk fat% than the other cross ewes. Ewes suckling multiple lambs had 29% higher peak milk yield than those bearing and suckling single lambs (P < 0.001). There was an increase in peak milk yield of the ewes from first to second parity, and third parity ewes had a greater decline to the end of lactation causing a significant interaction (P < 0.001). The overall decline in milk yield from peak to late lactation was –21.2 ± 0.7 g/day. Separate analysis showed a significant increase in milk yield with ewe pre-joining weight (regression 6.1 ± 1.8 g/day.kg). The estimate of heritability for daily milk yield was 0.24 ± 0.04 at 90 days of lactation and 0.10 ± 0.02 at 21 days of lactation. The estimates of heritability for the milk composition traits were generally moderate. Estimates of genetic correlations between measurements early and late in the lactation for milk yield and most composition traits were high. The within ewe by stage variance component estimates of repeatability were moderate to high for milk yield, fat% and protein%, with lactose% being low.

scholarly journals Effects of mammae hand massages on oxytocin release, milk yield, and milk quality in dairy cows

2021 ◽  
Vol 19 (3) ◽  
pp. 311
Author(s):  
Inggit Kentjonowaty ◽  
Achmad Bagus Adhiluhung Mardhotillah ◽  
Trinil Susilawati ◽  
Puguh Surjowardojo
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Block Design ◽  
Fat Content ◽  
Milk Quality ◽  
Randomized Block Design ◽  
Oxytocin Release

<p class="MDPI17abstract"><strong>Objective: </strong><span lang="EN-GB">The objective of this study was conducted to evaluate the effects of Mammae Hand Massages (MHM) on oxytocin release, milk yield, and milk quality in dairy cows.</span></p><p class="MDPI17abstract"><strong>Methods: </strong><span lang="EN">Twelve dairy cows with the following criterion: 5-yr-old, 1st to 9th month of lactation, and average body weight of 390 ± 5.55 kg were used. Cows were assigned in a randomized block design with 4 treatments, i.e T0 (without massage), T1 (MHM for 20 s), T2 (MHM for 50 s), and T3 (MHM for 80 s). Oxytocin release, milk yield, and milk quality were measured accordingly</span><span lang="EN-GB">.</span><strong></strong></p><p class="MDPI17abstract"><strong>Results: </strong><span lang="EN">The data obtained were analyzed using analysis of variance (ANOVA). The results showed that MHM had a very significant effect on milk production (P &lt;0.01) as evidenced by the MHM 50 s treatment obtained the highest average milk production (13.08 ± 3.38 liters/head/day) compared to the MHM 20 s, MHM 80 s and control. MHM (1-1.6 volts) for 50 s resulted in the highest release of oxytocin (0.22955 pcg/0.1mL) at 240 seconds compared to control, MHM 20 s and 80 s. Likewise, the percentage of milk protein content (2.96 ± 0.03) and milk fat content (4.27 ± 0.70) was highest at MHM 50 s</span><span lang="EN-GB">.</span><strong></strong></p><strong><span>Conclusions: </span></strong><span lang="EN">It can be concluded that MHM (1-1.6 volts) for 50 seconds increases the release of oxytocin, milk production, and milk quality in terms of the percentage of milk protein and fat content</span><span lang="EN-GB">.</span>

scholarly journals EFFECT OF FEEDING OAK (Quercus aegilops) ACORNS ON MILK PRODUCTION, MILK COMPOSITION AND SOME BLOOD BIOCHEMICAL PARAMETERS OF BLACK GOATS

2021 ◽  
Vol 52 (1) ◽  
pp. 28-35
Author(s):  
Hoger M. Hidayet ◽  
Kamal N. Mustafa
Keyword(s):  
Milk Yield ◽  
Milk Protein ◽  
Control Diet ◽  
Milk Composition ◽  
Serum Glucose ◽  
Blood Biochemical ◽  
Milk Protein Content ◽  
Serum Biochemical ◽  
Daily Milk Yield ◽  
Daily Milk

 Twenty four Black goat does at 1st week post kidding were adapted to control diet for 2 weeks and then blocked into 4 groups (6 does/group) to be fed on one of the experimental diets (0, 5, 10 and 15% oak acorns) to study the effect of different levels of oak acorns on milk yield, milk composition and some serum biochemical traits. Results revealed that at 10th week of lactation, there was a significant increase in daily milk yield in does fed on 15% oak acorns. In contrast the group fed on 15% oak acorns exhibited a significant decrease in milk protein and solid non-fat contents at 10th week of lactation. The milk lactose yield was significantly higher in group fed on 15% oak acorns at 10th week of lactation. The serum glucose concentration at 8th week of lactation was significantly higher in does fed on 10% oak acorns while at 10th week; it was significantly higher in does fed 5% oak acorns. It could be concluded that feeding does on diets containing 15% oak acorns caused a significant increase in daily milk yield of Black goats and a significant decrease in milk protein content.

Dairy productivity of zaanen type goats hybrids from crossing with the nubian breed bucks

2021 ◽  
pp. 28-32
Author(s):  
М.Ю. САННИКОВ ◽  
С.И. НОВОПАШИНА ◽  
С.А. ХАТАТАЕВ ◽  
Е.И. КИЗИЛОВА
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Goat Milk ◽  
Fat Content ◽  
Commercial Farming ◽  
Milk Protein Content ◽  
Daily Milk Yield ◽  
Qualitative Characteristics ◽  
Daily Milk

Изучена молочная продуктивность потомства I, II и III поколений при скрещивании молочных коз в типе зааненской породы с козлами нубийской породы. Установлено, что самый высокий удой за лактацию (576,5±11,62) был у чистопородных зааненских коз (n=72) — на 10,8—25,3% (P≦0,05) больше, чем у помесных животных за счет более длительной лактации (на 13,0%). Среднесуточный удой за лактацию был на 2,1% выше у помесей I поколения (n=26), чем у зааненских, на 4,9% — чем у помесей II (n=24) и на 13,5% — чем у помесей III поколений (n=21) (P≦0,05). Козоматки III поколения по содержанию жира превосходили сверстниц на 0,14—0,50 абс. процента, а белка — на 0,18—0,37 абс. процента. Среднесуточное количество молочного жира было выше у помесей I поколения на 0,9—7,3%, молочного белка — на 1,5—5,1%. За счет более продолжительного периода лактации козоматки зааненской породы превосходили своих помесных сверстниц по количеству молочного жира на 5,3—11,8% (1,2—2,5 кг) и по количеству молочного белка — на 7,7—11,3% (1,2—1,7 кг). Таким образом, поглотительное скрещивание является эффективным приемом для получения чистопородных животных нубийской породы. И может быть использовано в качестве селекционного приема в товарных хозяйствах для повышения качественных показателей молока коз в типе зааненской породы. Milk productivity of the offspring of generations I, II, and III during milk goat breeding in the type of the Saanen breed with goats of the Nubian breed was studied. It was found that the highest milk yield per lactation (576.5±11.62) was demonstrated by purebred Saanen goats (n=72) — by 10.8—25.3% (P≦0.05) more than in crossbred animals due to prolonged lactation (by 13.0%). Average daily milk yield per lactation was 2.1% higher in crossbred animals of generation I (n=26) compared to the Saanen breed, 4.9% higher than in crossbred animals of generation II (n=24), and 13.5% higher than in crossbred animals of generation III (n-21) (P≦0.05). By fat content the breeding goats of generation III are superior to their age-mates by 0.14—0.50 absolute percent, and by protein — by 0.18—0.37 absolute percent. Average daily milk fat content was 0.9—7.3% higher in crossbred animals of generation I; average daily milk protein content was 1.5—5.1% higher. Due to prolonged lactation breeding goats of the Saanen breed were superior to their crossbred age-mates in milk fat quantity by 5.3—11.8% (1.2—2.5 kg), and in milk protein quantity — by 7.7—11.3% (1.2—1.7 kg). Accordingly, accumulation cross breeding is an effective method of obtaining purebred animals of the Nubian breed. It can be used as a selection technique in commercial farming to increase qualitative characteristics of goat milk in the type of the Saanen breed.

scholarly journals Milk yield, composition, nutritive and technological values from ewes fed dried distillers’ wheat grains with solubles (DDGSw)

2014 ◽  
Vol 30 (4) ◽  
pp. 611-624
Author(s):  
M.R. Yossifov
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Control Diet ◽  
Raw Milk ◽  
Milk Composition ◽  
Technological Parameters ◽  
Wheat Grains ◽  
Dairy Ewes ◽  
Daily Milk Yield

The aims of this study were to evaluate the effects of lactating dairy ewes diets supplementing with different vegetable protein sources (sunflower meal (SFM) vs. dried distillers? wheat grains with solubles (DDGSw)) at the pick of lactation (27 - 72 lactating day). The experiment was carried out with sixteen lactating dairy ewes, Bulgarian Dairy Synthetic Population (BDSP) in 60-d feeding trial (7-d preparatory + 45-d experimental + 8-d closing periods). Animals were allotted randomly (by age, lactation, milk yield, % milk fat, % milk protein) into two dietary treatments: 1./ a SFM- based control diet (CD), and 2./DDGSw-based experimental diet (ED). Diets were iso- nitrogenous, iso- fibrogenous, iso- caloric and equal in protein truly digestible in the small intestines (PDI), calcium (Ca) and phosphorus (P). Compared with the CD, supplementation with DDGSw decreased (p<0.001) the average daily milk yield (5.8 %) and 6.5 % fat-corrected milk (6.8 %). There?re no significant differences in milk composition between treatments (CD and ED): solids non-fat (SNF) + 0.8; dry matter (DM) + 0.1 %; fat content of milk (MF) - 1.1 and milk protein (MP) content + 0.4 % per sheep for ED, compared with CD. DDGSw- based diet did not affect nutritive and technological parameters of raw milk: MP/MF (+ 1.3 %), MP/DM (- 0.1 %) and MF/DM (- 1.0 %) ratios. In conclusion, observed data indicates that DDGSw at level of 17 % DM basis affected ewe milk yielding negatively, without affecting milk composition, nutritive and technological parameters.

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