scholarly journals Effect of milking time, lactation stage and udder traits on milk yield of Red Sokoto and Boer goats in semi-arid, Nigeria

2021 ◽  
Vol 48 (5) ◽  
pp. 100-112
Author(s):  
H. A. Muhammad ◽  
Y. Garba ◽  
D. Ogah ◽  
S.K. Inusa
Keyword(s):  
Milk Yield ◽  
Early Stage ◽  
Significant Interaction Effect ◽  
Boer Goat ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Lactation Stage ◽  
Significant Difference ◽  
Morning Milk ◽  
Boer Goats

The aim of the study was to evaluate the effect of milking time, lactation stage and udder traits on milk yield of Red Sokoto and Boer goats at the farm of Centre for Dry-land Agriculture, Bayero University Kano, Nigeria. The first evaluation of milk yield was done at early stage of lactation starting after day seven of kidding to exclude colostrum. Daily collection of milk samples followed in the morning and evening until 10 weeks of lactation. The weeks were divided into 3 stages of lactation as early, mid and late lactation stages. Milk samples were measured using a 100 mL measuring cylinder and later converted into grammes. The external udder measurements were taken in cm after seven days post kidding and fortnightly for the period of lactation. The result obtained shows significant difference (p<0.05) in the total morning milk yield between the goats. The total morning milk yield was higher (2642.00 ± 3.18 g) in the Boer goats than in the Red Sokoto (2371.50± 3.18 g). However, the average daily milk yield, total milk yield and total evening milk yield were not significantly (p>0.05) affected by the breeds of goat. Mean milk yield was significantly (p<0.05) influenced by stage of lactation and time of milking. The milk yield was significantly higher (98.91 g) in the late lactation while the least was obtained in the mid stage of lactation (65.44 g). Moreover, the morning milk yield was significantly higher than the evening milk yield. A significant interaction effect (p<0.05) of lactation stage and milking time was similarly observed. The results indicated that breed significantly (p<0.05) influenced most of the udder traits except UC, UW and TFD. Significantly (p<0.05) higher values of UL, UW, TC, RTL, LTL, CH and TFD were recorded in the Red Sokoto. Furthermore, the Boer goat breed had significantly higher values of NT, UC and DBT.     Le but de l'étude était d'évaluer l'effet de la traite de traite, de la phase de lactation et des traits de la piste sur le rendement du lait de Red Sokoto et des chèvres de Boer à la ferme du Centre d'agriculture à sec, de l'Université Bayero Kano, du Nigéria. La première évaluation du rendement en lait a été effectuée à un stade précoce de l'allaitement à partir de sept jours de blague pour exclure le colostrum. La collecte quotidienne d'échantillons de lait a suivi le matin et le soir jusqu'à 10 semaines de lactation. Les semaines ont été divisées en 3 étapes de la lactation comme des étapes de début et de lactation tardive. Les échantillons de lait ont été mesurés à l'aide d'un cylindre de mesure de 100 ml et convertis ultérieurement en grammes. Les mensurations externes de la mamelle ont été prises en cm après sept jours après la mise bas et tous les quinze jours pendant la période de lactation. Le résultat obtenu présente une différence significative (p <0,05) dans le rendement le lait total du matin entre les chèvres. Le rendement au lait total du matin était plus élevé (2642,00 ± 3,18 g) dans les chèvres Boer que dans le Sokoto rouge (2371.50 ± 3,18 g). Cependant, le rendement quotidien moyen quotidien, le rendement total du lait et le rendement au lait total de la soirée n'étaient pas significativement (p> 0,05) affectés par les races de chèvre. Le rendement en lait moyen était significativement (p <0,05) influencé par la phase de lactation et du temps de traite. Le rendement en lait était significativement plus élevé (98,91 g) à la fin de la lactation, tandis que le moindre a été obtenu au stade moyen de la lactation (65,44 g). De plus, le rendement au lait du matin était nettement supérieur au rendement le lait du soir. Un effet d'interaction significatif (P <0,05) de stade de lactation et de délai de traite a été observé de la même manière. Les résultats ont indiqué que la race de manière significative (p <0,05) a influencé la plupart des traits de pis de la piste, à l'exception des UC, UW et TFD. De manière significative (p <0,05) des valeurs plus élevées d'UL, UW, TC, RTL, LTL, CH et TFD ont été enregistrées dans le Red Sokoto. De plus, la race de chèvre Boer avait des valeurs significativement plus élevées de NT, UC et DBT.

An investigation of the changes in sites of milk storage in the bovine udder over two lactation cycles

1993 ◽  
Vol 57 (03) ◽  
pp. 379-384
Author(s):  
R. J. Dewhurst ◽  
C. H. Knight
Keyword(s):  
Milk Yield ◽  
Total Yield ◽  
Significant Interaction Effect ◽  
Stage Of Lactation ◽  
Lactation Curve ◽  
Significant Difference ◽  
Total Milk ◽  
Sources Of Variation ◽  
Rate Of Decline ◽  
Daily Milk Yield

AbstractThe objective of this work was to investigate phenotypic sources of variation in the sites of storage of milk within the udder. Ten primiparous and 10 multiparous dairy cows were studied over two successive lactations in order to investigate the effects of age, parity and stage of lactation. Cistern and alveolar milk volumes were estimated at a standard 8 h after a normal morning milking by catheter drainage and machine milking with oxytocin respectively. Measurements were made at approximately 9, 20, 30 and 42 weeks of the initial lactation and weeks 1, 4, 7, 10, 20 and 34 of the subsequent lactation. In the initial lactation, there was a significant difference between primiparous and multiparous animals in the rate of decline of total daily milk yield (P&lt; 0·001). Cistern milk yield (kg/8 h) from multiparous animals declined over the lactation whilst that for primiparous animals was maintained. The effect was shown as a significant interaction effect (P&lt; 0·05). For both multiparous and primiparous animals cistern proportion (cistern yield divided by total milk yield at 8h after a normal milking), increased over the lactation (P&lt; 0·001). This was largely a consequence of the reduced total milk yield. Eleven animals were studied through the subsequent lactation. Cistern yield followed a lactation curve of similar form to that for total yield. The decline in cistern yield over this lactation was much greater than the decline with multiparous animals in the previous year. This may, in part, reflect a faster decline in total daily yield. Stage of lactation and parity must be taken into account if a standardized evaluation of cistern characteristics is to be obtained.

scholarly journals Factors affecting the freezing point of milk from Polish Holstein-Friesian cows

2017 ◽  
Vol 17 (3) ◽  
pp. 873-885 ◽  
Author(s):  
Agnieszka Otwinowska-Mindur ◽  
Ewa Ptak ◽  
Agnieszka Grzesiak
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Freezing Point ◽  
Raw Milk ◽  
Herd Size ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Lactation Stage ◽  
Holstein Friesian ◽  
Friesian Cows

Abstract The objective of this study was to estimate the influence of lactation number, month of milk sampling, lactation stage and herd size on the freezing point of milk of Polish Holstein‑Friesian cows. Data comprised 4,719,787 milk samples from the first seven lactations of 752,770 Polish Holstein- Friesian cows. Milk freezing point (MFP), milk yield, and fat and protein content were analyzed. The mean MFP of milk samples (-0.5326°C) as well as more than 92% of all milk samples did not exceed the quality limit for the freezing point of cows′ raw milk, which, following Polish standards, was taken to be -0.52°C. The freezing point of milk samples, milk yield, fat and protein content were highly significantly affected by all examined factors: month of sampling, successive lactations, stage of lactation, and herd size. MFP was lowest in milk samples taken from January to March, and highest in samples from November to December. MFP increased with lactation number. Mean MFP decreased with time within lactation, except the first stage (5-35 days in milk). Generally, MFP was highest in small herds (up to 9 cows) and lowest in large herds (more than 150 cows).

scholarly journals Comparative evaluation of lactation performance of West African dwarf and red sokoto goats raised in a hot-humid environment

2020 ◽  
Vol 44 (2) ◽  
pp. 195-205
Author(s):  
F. O. Ahamefule ◽  
N. J. Ekanem ◽  
U. U. Uka ◽  
K. Ikwunze
Keyword(s):  
Milk Yield ◽  
Goat Milk ◽  
West African ◽  
Lactation Performance ◽  
Total Solids ◽  
West African Dwarf ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Butter Fat ◽  
Lactation Stage

The milk yield and compositions of twelve lactating does comprising six each of West African Dwarf (Fouta djallon) and Red Sokoto (Maradi) were compared in a 21-week study. The does in their second parity were monitored over a full lactation. The goats received daily basal grass and browse fodder in addition to a concentrate supplement in a 2 × 3 factorial experiment. The does were hand milked and milk yield (g/d) was quantified daily. Milk samples were analyzed weekly for total solids (TS %), butter fat (BF %), solids-not-fat (SNF %), crude protein (CP %) and total ash (TA %). Lactose concentration (LC %) was analyzed daily immediately after sampling. Macro-minerals in milk samples were determined by dry ash extraction method specific for each mineral element. Milk yield was influenced significantly (p<0.05) by both breed and stage of lactation. The WAD produced more milk (97.34 g/d than RS (87.01 g/d). For both breeds, the average mid lactation milk yield (119.04 g/d) was significantly (p<0.05) different than either early (88.35 g/d) or late (69.14 g/d). The highest milk production was by WAD does in mid lactation (125.10 g/d) and the least was by RS in late lactation (47.07 g/d). The TS, BF, SNF, CP and LC concentrations in milk were not influenced (P>0.05) by breed. The TA was significantly (P<0.05) higher in WAD milk (0.89 %) relative to RS milk (0.88 %). Also, stage of lactation significantly (P<0.05) influenced the concentrations of TS, BF, TA and LC in WAD and RS goats milk. Total solids was significantly (P<0.05) higher in late (13.47 %) than in early (12.53 %) lactation for both breeds. The BF and LC in milk followed similar trend, recording 4.45, 3.89 and 4.13 and 3.98 % in late and early stages of lactation respectively. On the other hand, The TA decreased with advancing lactation and the highest value was obtained in the early (0.92 %) than in mid (0.89 %) and late (0.86 %) lactation in both WAD and RS goat milk. TA was highest in WAD milk in early lactation (0.92 %) and least in RS milk in late lactation (0.85 %). All macro minerals were influenced (p<0.05) by lactation stage and breed differences, except potassium (K) and sodium (Na) which were only influenced by the stage of lactation. The milk of both WAD and RS goats yielded more calcium (Ca) than K, which was attributed to the nutrients in the diets.

scholarly journals Contents of Zn, Cu, Mn and Se in Milk in Relation to their Concentrations in Blood, Milk Yield and Stage of Lactation in Dairy Cattle

2008 ◽  
Vol 77 (4) ◽  
pp. 523-531 ◽  
Author(s):  
A. Pechová ◽  
L. Pavlata ◽  
R. Dvořák ◽  
E. Lokajová
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Holstein Cattle ◽  
Blood Concentrations ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Lactation Stage ◽  
Daily Milk Production ◽  
Daily Milk

The objective of the study was to assess the effect of actual daily milk production and lactation stage on concentrations of Zn, Mn, Cu and Se in milk, and monitor correlations between milk and blood concentrations of these microelements. The study was performed in a herd of Holstein cattle with the average milk yield of 8,562 kg. Thirty-five dairy cows housed in one group were included in the study. Blood and milk samples were taken during two separate milk yield checks done 4 weeks apart. Actual milk production of monitored cows ranged from 19.6 to 62.6 l daily. For lactation stages we evaluated results of examinations performed from 7 to 188 days of lactation. Blood examinations showed that the cows included in our study had good supplementation with the microelements in question. Milk concentrations of individual microelements were as follows: 3855.2 ± 814.7 μg/l of Zn; 36.3 ± 14.4 μg/l of Cu; 20.1 ± 8.3 μg/l of Mn, and 28.6 ± 7.1 μg/l of Se. The effect of daily milk production on milk concentrations of the microelements was identified only for copper (r = -0.302, p ⪬ 0.05). The variable of days of lactation (not considering days of the colostrum period) showed a positive correlation in manganese (r = 0.419, p ⪬ 0.01); copper and selenium showed negative correlations (Cu: r = -0.258, p ⪬ 0.05; Se: r = -0.277, p ⪬ 0.05). The daily milk production influenced negatively only Cu concentration in milk, but Se, Zn and Mn was not influenced.With advancing lactation after colostrum period the concentration of Mn in milk raised, the concentration of Cu and Se declined and the concentration of Zn was unchanged.

scholarly journals Intramammary antibiotic withdrawal periods for dairy goats compared to those for dairy cattle

2008 ◽  
Vol 75 (3) ◽  
Author(s):  
I.M. Petzer ◽  
E.F. Donkin ◽  
E. Du Preez ◽  
J. Karzis ◽  
T.J. Van der Schans ◽  
...  
Keyword(s):  
Milk Yield ◽  
Animal Health ◽  
Safety Margin ◽  
Dairy Goats ◽  
Positive Correlation ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Significant Difference ◽  
Positive Correlations ◽  
Composite Samples

This study investigated the withdrawal periods (WP) of two intramammary antibiotics Cloxamast LC (Intervet SA) and Spectrazol Milking Cow (Schering-Plough Animal Health) in dairy goats and compared them to those recommended for use in cattle. The WP for Cloxamast LC, measured by the Thermo Resistant Inhibitory Substances (TRIS) test, was 60 h in composite samples, 56 h in udder half samples, and the dye was visible for up to 56 h. The WP was significantly shorter than the 72 h recommended WP for use in cattle. It was however significantly longer when the 24 h safety margin (48 h) was subtracted from the recommended WP for cattle. For Spectrazol Milking Cow the antibiotics could be detected by the TRIS test for 61 h in composite samples and 59 h in udder half samples. This did not differ significantly from the recommended 60 h WP for cattle. However, it was significantly longer than that recommended for use in cattle without the 24 h safety margin. There was no significant difference in WP between infected and non-infected udder halves, while there was a weak positive correlation between WP and stage of lactation (R2 = 0.253). There was a moderate positive correlation (R2 = 0.583) between the TRIS test and the presence of dye in milk in udder half samples and between WP in both udder half and composite milk samples (R2 = 0.456). Weak to moderate positive correlations were present between milk yield and the WP in both udder half (R2 = 0.414) and composite (R2 = 0.262) milk samples. Significant differences (P < 0.001) were also observed between the milk yield of udder halves with and without palpable udder damage and between samples that tested TRIS positive and negative on both composite (P = 0.008) and udder half samples (P < 0.001). There was no significant difference between the milk yield of samples with or without dye. There was a significant difference in milk yield between infected and non-infected udder halves (P = 0.054) and a weak negative correlation between milk yield and stage of lactation (R2 = -0.379).

Effect of CSN1S1 gene polymorphism and stage of lactation on milk yield and composition of extensively reared goats

2013 ◽  
Vol 80 (2) ◽  
pp. 129-137 ◽  
Author(s):  
Filippo Balia ◽  
Michele Pazzola ◽  
Maria Luisa Dettori ◽  
Maria Consuelo Mura ◽  
Sebastiano Luridiana ◽  
...  
Keyword(s):  
Milk Yield ◽  
Nutritional Value ◽  
Freezing Point ◽  
Essential Amino Acids ◽  
Amino Acid Profile ◽  
Point Of View ◽  
Optimal Composition ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Lactation Stage

The effect of CSN1S1 genotype and lactation stage on milk yield and composition were investigated in 80 extensively reared goats. Milk yield was recorded in early, mid and late lactation and individual milk samples were collected to determine: fat, protein, lactose and casein content, pH, freezing point, somatic cell count (SCC) and total microbic mesophilic count (TMC). Relative casein composition and amino acid profile were quantified by HPLC. Fatty acid profile was measured by gas-chromatography. Genotype did not affect milk yield, while this trait was significantly affected by lactation stage (P < 0·01). CSN1S1 BB goats produced significantly higher protein and casein percentages (P < 0·05). αs1-casein (CN) was significantly higher in BB and AB goats than AF and BF, showing intermediate values in AA goats (P < 0·01). The protein percentage and the αs1 and αs2-CN fractions were not affected by lactation stage, while the casein content and the β and κ-CN significantly increased throughout lactation (P < 0·01). C4 : 0 and C6 : 0 were not affected by genotype, while C8 : 0 and C10 : 0 were higher in the AA goats than BB; most of the long chain FA were higher in BB than AA goats. MUFA and PUFA increased in late lactation. In addition, BB goats showed higher essential amino acids, resulting in an optimal composition from the nutritional point of view, when compared with AA goats. The increase of MUFA, PUFA, essential and cis-FA in late lactation indicate that the lipid composition of goat's milk, with the progress of lactation, tends to improve its nutritional value.

A COMPARISON OF EQUAL-SIZED VERSUS PROPORTIONAL-SIZED EVENING AND MORNING MILK SAMPLES ON FAT, PROTEIN AND TOTAL SOLIDS TESTS

1977 ◽  
Vol 57 (4) ◽  
pp. 807-809
Author(s):  
O. R. IRVINE ◽  
D. R. McKNIGHT
Keyword(s):  
Milk Yield ◽  
Total Solids ◽  
Milk Samples ◽  
Morning Milk

Averages of 11 Holsteins for fat, protein and total solids were calculated from equal-sized night and morning samples and compared to those weighted proportionally to the night’s and morning’s milk yield. The former were significantly higher in the case of fat and total solids, but not for protein.

scholarly journals RELATIONSHIP BETWEEN BLOOD METABOLIC PROFILES AND MILK YIELD ASSOCIATED WITH PARITY AND STAGE OF LACTATION IN CROSSBRED DAIRY COWS IN BANGLADESH

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
L Naher ◽  
M. A. Samad ◽  
S. H. M. F. Siddiki ◽  
M. T. Islam
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Metabolic Profile ◽  
Transition Period ◽  
Dairy Herds ◽  
Metabolic Profiles ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Lactating Dairy Cows ◽  
Calcium Phosphorus

Background: Cattle cross-breeding program has been launched throughout Bangladesh but this program has still focused mainly on biological rather than economic evaluation. Currently, 30000 dairy farms with mainly cross-bred cows are in operation throughout the country and this intensive dairy farming system with high milk yielding dairy cows is supposed to be associated with high incidence of sub-clinical nutritional and metabolic diseases. Objectives: The objective of this study was to detect the relationship between major blood metabolic profiles and milk yield associated with parity and stage of lactation in cross-bred dairy cows. Materials and Methods: Blood samples of 220 apparently healthy lactating cross-bred dairy cows (HF x L, n = 190; SH x L, n = 20 and JS x L, n = 10) of 10 dairy herds were collected for metabolic profile test (MPT) in Bangladesh during the period from July to November 2016. The major metabolic profiles which are associated with milk fever (calcium, phosphorus & magnesium) and ketosis (glucose) were considered in this study. These biochemical parameters were estimated to detect the influence of risk factors including herds, breeds, parities and lactation age of cross-bred lactating dairy cows by using the commercial kits in spectrophotometer method. Results: The evaluation of the biochemical constituents of 220 cross-bred lactating dairy cows revealed that 30% (n = 66) had hypocalcaemia and 20.45% (n = 45) had hypoglycemia. Significantly lower levels of average calcium (7.93 ± 0.36 mg/dl; p < 0.024) and glucose (43.44 ± 3.63 mg/dl; p < 0.0001) values were recorded in HF x L cross-bred dairy herd of BAUDF, Mymensingh in comparison to other investigated nine dairy herds. The highest milk yield was recorded at 7th parity (16 +- 0.91 liter / day) and 1st week of lactation (17.33 +- 1.09 liter / day) were associated with low mean calcium (8.09 +- 0.85 mg / dl; 6.68 +- 0.13 mg/dl) and glucose (36.45 +- 7.67 mg/dl; 32.31 +- 3.90 mg / dl) levels in comparison to the respective values of different parity and lactation weeks. Conclusions: A relationship between blood metabolic profiles and milk yield associated with herd, breed, parity and lactation stages was recorded in lactating crossbred dairy cows. The evaluation of blood metabolites at different stages of lactation cycle especially at transition period is required to detect the nutritional and metabolic health for optimum milk production and to achieve maximum reproductive potential of high yielding dairy cattle. The readily available milk samples could be used as a biological fluid to monitor the health and nutritional status of dairy cows by using mid-infrared (MIR) spectroscopy method to prevent sub-clinical metabolic disorders. Therefore, well developed laboratories with necessary equipment, test kits and reagent should be provided to perform MPT in both the blood and milk samples for practical uses. Keywords: Compton metabolic profile test, Metabolic profile, Lactating cross-bred cows, Calcium, Phosphorus, Magnesium, Glucose, Parity, Lactation stages

Variation of freezing point of cow's milk free from extraneous water during lactation

2000 ◽  
Vol 25 ◽  
pp. 165-168
Author(s):  
B.A. Slaghuis ◽  
G.H. Klungel
Keyword(s):  
Milk Yield ◽  
Freezing Point ◽  
Bovine Milk ◽  
Cow’S Milk ◽  
Cow's Milk ◽  
Freezing Points ◽  
Stage Of Lactation ◽  
Lactation Curve ◽  
One Year ◽  
Morning Milk

AbstractThe freezing point of bovine milk is known to vary between narrow limits. However, some variation is possible, because of the osmotic relationship between blood and milk. The extent of variation in freezing points of cow's milk was studied. For one year, freezing points were determined in individual milk samples from a high producing herd. Differences (P<0.05) were found between evening and morning milk yield and freezing points. A ‘lactation curve’ for freezing points was fitted and showed some similarity with milk yield curves. Stage of lactation explained part of the variation of freezing points of cow's milk.

Normal day to day variability of yield of milk and fat of individual cows

1929 ◽  
Vol 19 (3) ◽  
pp. 438-451 ◽  
Author(s):  
Stephen Bartlett
Keyword(s):  
Milk Yield ◽  
Southern England ◽  
Stage Of Lactation ◽  
Morning Milk

1. The day to day variability in the yield of milk and fat of cows is affected by many factors, two of which are stage of lactation and season of the year. Variability is high during the first month of lactation (particularly during the first few days after the calf is weaned), but after this a fairly constant variability may be expected. Under the conditions of management in the herd under discussion and probably in most herds in Southern England variability is highest during the month of May and also tends to be higher during the summer than the winter months.2. A method is presented of calculating the variability in the yield of mixed milk from a herd of cows and the error to be expected when milk records and fat percentages of individual cows are calculated from a few samples.3. When cows are milked twice daily at unequal intervals the yield of milk obtained in 24 hours is slightly less variable if a morning milk yield is added to the subsequent evening yield, than if an evening yield is added to the subsequent morning yield.

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