EFFECTS OF PROPYLENE GLYCOL OR GLYCEROL SUPPLEMENTATION OF THE DIET OF DAIRY COWS ON FEED INTAKE, MILK YIELD AND COMPOSITION, AND INCIDENCE OF KETOSIS

1973 ◽  
Vol 53 (2) ◽  
pp. 289-296 ◽  
Author(s):  
L. J. FISHER ◽  
J. D. ERFLE ◽  
G. A. LODGE ◽  
F. D. SAUER
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Propylene Glycol ◽  
Milk Yield ◽  
Feed Intake ◽  
Milk Fat ◽  
Metabolizable Energy ◽  
Or Efficiency ◽  
Concentrate Mixture ◽  
Glucose Therapy

In two experiments designed to test the antiketogenic properties of propylene glycol and glycerol, concentrate mixtures containing 3, 6, or 9% propylene glycol or 3 or 6% glycerol were fed for the first 8 wk of lactation to a total of 120 cows. In the first experiment there were no significant effects (P > 0.05) of supplementation on milk yield and composition, feed intake, or energy balance. The cows fed a concentrate mixture containing 6% glycerol appeared to lose less body weight than the control cows or those fed concentrate containing either 3% glycerol or 3% propylene glycol. Cows fed the unsupplemented concentrate mixture were apparently less efficient in utilizing metabolizable energy than cows receiving either of the three supplemented rations but these differences were not significant (P > 0.05). There were no incidences of clinical ketosis and only 14 occurrences of positive ketone reactions in the milk (five on control, three on the 3% propylene glycol, four on 3% glycerol, and two on 6% glycerol). In the second experiment cows were subjected to slightly greater nutritional stress, which resulted in elevated ketone levels in 31 samples of milk from control cows, six from cows fed 3% propylene glycol, two for cows fed 6% propylene glycol, and three for cows fed 9% propylene glycol. Four cows, all on the control ration, developed clinical ketosis requiring glucose therapy. There were no consistent effects of propylene glycol on feed intake, body weight change, or efficiency of ration utilization. Propylene glycol supplementation appeared to increase milk yield at the 3 and 6% level and caused a slight decrease in milk fat and an increase in milk lactose percent.

Effect of feeding hay vs. silages of various types to dairy cows on feed intake, milk composition and coagulation properties

2020 ◽  
Vol 87 (3) ◽  
pp. 334-340
Author(s):  
Elisa Manzocchi ◽  
Werner Hengartner ◽  
Michael Kreuzer ◽  
Katrin Giller
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Feed Intake ◽  
Milk Fat ◽  
Fixed Effects ◽  
Experimental Period ◽  
Milk Composition ◽  
Processing Technology ◽  
Maize Silage ◽  
Rennet Coagulation

AbstractThis research paper addresses the hypotheses (1) that milk produced from hay-fed cows differs from that of silage-fed cows and (2) that silage type has an important impact, too. Four diets differing in forage type but with equal estimated milk production potential and a forage:concentrate ratio of 0.85 : 0.15 were compared regarding their effect on feed intake, milk yield and milk properties. The forages tested were hay, grass silage, conventional short-chopped and long-chopped maize silage subjected to a novel processing technology (Shredlage®). Twenty-four dairy cows were fed two of the four diets in two consecutive runs in an incomplete (4 × 2) Latin-square design (n = 12 per diet). Each experimental period lasted 22 d, with 12 d of adaptation and 10 d of sampling. During sampling, feed intake and milk yield were recorded daily, milk composition and coagulation properties were determined four times. The composition of the diet ingredients was analysed weekly. Data were analysed with a mixed model considering feed, period and their interaction as fixed effects. Stage of lactation, milk yield and milk composition from the pre-experimental period were used as covariates in the model. Dry matter intake was lower with the long-chopped processed maize silage compared to the other three groups. There were some diet differences in intakes of net energy for lactation and absorbable protein in the duodenum, but this did not result in changes in milk yield. The milk fat content was higher with the grassland-based diets compared to the maize silage diets. No treatment effect on milk acidity and rennet coagulation properties was observed. In conclusion, there were no indications for specific physico-chemical properties of milk from a hay-based diet, and maize processing technology was not of large effect either. Future investigations should focus on sensory differentiation of the milk produced with different forages.

An energy-protein feed additive containing different sources of fat improves feed intake and milk performance of dairy cows in mid-lactation

2019 ◽  
Vol 86 (1) ◽  
pp. 55-62
Author(s):  
Piotr Micek ◽  
Zygmunt M. Kowalski ◽  
Marek Sady ◽  
Jolanta Oprządek ◽  
Jacek Domagała ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Milk Yield ◽  
Feed Intake ◽  
Milk Fat ◽  
Functional Health ◽  
Feed Additive ◽  
Nutritional Effect ◽  
Total Fatty Acids ◽  
Protein Feed

AbstractThis research paper addresses the hypothesis that calcium salts combined with whole linseed and heat-treated rapeseed cake in one feed additive may efficiently stimulate the productivity of dairy cows and have a positive effect on the functional (health-promoting) properties of milk fat. The article proposes the composition of such an additive (EFA) and evaluates its nutritional effect in the diet of mid-lactation dairy cows. Forty multiparous Polish Holstein-Friesian (PHF) dairy cows were allocated to one of four treatments (10 cows/treatment) and fed a TMR diet without EFA or with EFA in the amount of 1, 2 or 3 kg/d per head for a 63-d-period. Individual intake of dry matter (DMI) and nutrients was determined, as was milk yield and composition, including fatty acid profile, fat soluble vitamins, cholesterol and phospholipids (PLs). Irrespective of the treatment group, cows fed diets with EFA had higher (P < 0.05) DMI, milk yield and milk vitamin D3 and K2 concentration but lower (P < 0.01) milk protein, fat and cholesterol contents. The additive did not affect the milk concentrations of β-carotene or vitamin A or E. The PLs content was correlated with fat concentration in the milk and decreased as the level of EFA in the diet increased. An increase in phosphatidylcholine in total PLs was accompanied by a reduction in the proportion of sphingomyelin (P < 0.05). The use of EFA increased the proportion of polyunsaturated fatty acids (PUFA) in the total fatty acids in the milk. The addition of EFA in the amount of 3 kg increased the proportion of PUFA by 77% (P < 0.05). In conclusion, the use of an energy-protein feed additive (EFA) increases feed intake and milk yield in cows and alters milk fat composition, improving its functional properties. Higher milk production compensates for the decrease in solids concentration in the milk, which has no effect on their daily yield.

scholarly journals Effect of Soybean Oil Supplementation on Milk Production, Digestibility, and Metabolism in Dairy Goats under Thermoneutral and Heat Stress Conditions

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 350
Author(s):  
Soufiane Hamzaoui ◽  
Gerardo Caja ◽  
Xavier Such ◽  
Elena Albanell ◽  
Ahmed A. K. Salama
Keyword(s):  
Body Weight ◽  
Heat Stress ◽  
Linoleic Acid ◽  
Soybean Oil ◽  
Milk Yield ◽  
Feed Intake ◽  
Milk Fat ◽  
Milk Protein ◽  
Dairy Goats ◽  
Milk Protein Content

In a previous work, we observed that heat-stressed goats suffer reductions in milk yield and its contents of fat and protein. Supplementation with soybean oil (SBO) may be a useful strategy to enhance milk quality. In total, eight multiparous Murciano–Granadina dairy goats (42.8 ± 1.3 kg body weight; 99 ± 1 days of lactation) were used in a replicated 4 × 4 Latin square design with four periods; 21 d each (14 d adaptation, 5 d for measurements and 2 d transition between periods). Goats were allocated to one of four treatments in a 2 × 2 factorial arrangement. Factors were no oil (CON) or 4% of soybean oil (SBO), and controlled thermal neutral (TN; 15 to 20 °C) or heat stress (HS; 12 h/d at 37 °C and 12 h/d at 30 °C) conditions. This resulted in four treatment combinations: TN-CON, TN-SBO, HS-CON, and HS-SBO. Compared to TN, HS goats experienced lower (p < 0.05) feed intake, body weight, N retention, milk yield, and milk protein and lactose contents. However, goats in HS conditions had greater (p < 0.05) digestibility coefficients (+5.1, +5.2, +4.6, +7.0, and +8.9 points for dry matter, organic matter, crude protein, neutral detergent fiber, and acid detergent fiber, respectively) than TN goats. The response to SBO had the same magnitude in TN and HS conditions. Supplementation with SBO had no effects on feed intake, milk yield, or milk protein content. However, SBO supplementation increased (p < 0.05) blood non-esterified fatty acids by 50%, milk fat by 29%, and conjugated linoleic acid by 360%. In conclusion, feeding 4% SBO to dairy goats was a useful strategy to increase milk fat and conjugated linoleic acid without any negative effects on intake, milk yield, or milk protein content. These beneficial effects were obtained regardless goats were in TN or HS conditions.

scholarly journals Milk Production and Energetic Metabolism of Heat-Stressed Dairy Goats Supplemented with Propylene Glycol

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2449
Author(s):  
Soufiane Hamzaoui ◽  
Gerardo Caja ◽  
Xavier Such ◽  
Elena Albanell ◽  
Ahmed A. K. Salama
Keyword(s):  
Body Weight ◽  
Heat Stress ◽  
Propylene Glycol ◽  
Feed Intake ◽  
Milk Fat ◽  
Body Weight Gain ◽  
Latin Square ◽  
Body Weight Loss ◽  
Dairy Goats ◽  
Milk Fat Depression

Heat-stressed dairy animals increase their reliance on glucose. This elevated glucose demand is partially met by increasing the conversion of glucogenic amino acids (AA) in the liver. Propylene glycol (PG) is a glucogenic precursor and was not tested in dairy goats under thermoneutral (TN) and heat stress (HS) conditions simultaneously. We hypothesize that if HS-goats are fed with PG, they would get more glucose and consequently spare more glucogenic AA for milk protein synthesis rather than gluconeogenesis. Eight multiparous dairy goats (40.8 ± 1.1 kg body weight; 84 ± 1 days in milk) were used in a replicated 4 × 4 Latin square design of 4 periods; 21 d each (14 d adaptation, 5 d for measurements, and 2 d of transition). Goats were allocated to one of 4 treatments in a 2 × 2 factorial arrangement. Factors were control (CO) without PG or 5% of PG, and thermoneutral (TN; 15 to 20 °C) or heat stress (HS; 12 h/d at 37 °C and 12 h/d at 30 °C) conditions. Feed intake, rectal temperature, respiratory rate, milk yield, milk composition, and blood metabolites were measured. Compared to TN, HS goats had lower (p < 0.01) feed intake (–34%), fat-corrected milk (–15%), and milk fat (–15%). Heat-stressed goats also tended (p < 0.10) to produce milk with lower protein (–11%) and lactose (–4%) contents. Propylene glycol increased blood glucose (+7%; p < 0.05), blood insulin (+37%; p < 0.10), and body weight gain (+68%; p < 0.05), but decreased feed intake (–9%; p < 0.10) and milk fat content (–23%; p < 0.01). Furthermore, blood non-esterified fatty acids (–49%) and β-hydroxybutyrate (–32%) decreased (p < 0.05) by PG. In conclusion, supplementation of heat-stressed dairy goats with propylene glycol caused milk fat depression syndrome, but reduced body weight loss that is typically observed under HS conditions. Supplementation with lower doses of PG would avoid the reduced feed intake and milk fat depression, but this should be tested.

Milk production in early lactation dairy cows given grass silagead libitum: Influence of concentrate energy source, crude protein content and level of concentrate allowance

1988 ◽  
Vol 46 (3) ◽  
pp. 317-331 ◽  
Author(s):  
B. K. Sloan ◽  
P. Rowlinson ◽  
D. G. Armstrong
Keyword(s):  
Energy Source ◽  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Crude Protein ◽  
Metabolizable Energy ◽  
Energy Concentration ◽  
Concentrate Energy ◽  
Neutral Detergent Fibre ◽  
Concentrate Energy Source

ABSTRACTThere is increasing interest in how the raw material make-up of concentrates can influence the milk performance of dairy cows. Thus, over two consecutive winters, 54 dairy cows were used to investigate the effects on dry matter (DM) intake, milk yield and its composition of feeding concentrates of diverse energy source (LNDF — 131 g neutral-detergent fibre per kg DM, 492 g starch plus sugars per kg DM; HNDF — 244 g neutral-detergent fibre per kg DM, 293 g starch plus sugar per kg DM) at two formulated crude protein (CP) levels (157v.187 g/kg DM) and three levels of concentrate allowance (9, 11, 13 kg DM). The concentrates were formulated to be of equivalent metabolizable energy concentration (MJ/kg DM) and were offered with silagead libitumfor a 10-week period (weeks 4 to 13 of lactation).Silage intakes were variable but not significantly influenced by concentrate energy source or formulated CP level, except in the 1st year where animals consuming the high CP concentrate ate more silage. Silage DM intake decreased as concentrate allowance was increased with the substitution rate (kg silage DM per kg concentrate DM) increasing as concentrate allowance was increased.Increasing the concentrate allowance effected the expected increases in milk yield. Concentrate energy source did not influence milk yield but the higher CP levels effected a 2-kg increase in milk yield. Feeding of LNDF concentrates depressed milk fat concentration and its yield, the depression being accentuated with each increase in concentrate allowance. The depression in milk fat concentration was negatively correlated with the forage: concentrate ratio of the diet consumed. Furthermore, dietary NDF proportion was shown to account for greater than half of the variation in milk fat concentration. In contrast to the observations made for milk fat, feeding the LNDF concentrates effected an increase in milk protein concentration but only at the lower CP level of the concentrate.

The effect of long-term daily administration of bovine somatotrophin on the performance of dairy cows over a second consecutive lactation

1989 ◽  
Vol 1989 ◽  
pp. 20-20
Author(s):  
R.F. Butterwick ◽  
T.E.C. Weekes ◽  
P. Rowlinson ◽  
D.S. Parker ◽  
D.G. Armstrong
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Yield ◽  
Body Condition ◽  
Feed Intake ◽  
Body Condition Score ◽  
Post Partum ◽  
Reproductive Status ◽  
Condition Score ◽  
Bovine Somatotrophin

The objectives of the trial were to investigate the effects of bovine somatotrophin (BST) from either week 2 or week 10 post-partum on the yields of milk, milk components, body weight, body condition, feed intake, health and reproductive status of dairy cows over a second consecutive lactation. The results from the heifer lactation have been reported previously (Butterwick et al. 1988).17 Friesian dairy cows in their second lactation were continued on the same treatment as in their heifer lactation: daily subcutaneous injection of recombinantly derived bovine somatotrophin (BST;25mg/d) from either week 2 (BST2;n=6) or week 10 (BSTl0;n=5) post-partum, or injection of a buffer solution from week 2 of lactation (C;n=6). Treatments continued until week 42 of lactation or until 60 days prior to predicted calving date, if this occurred before week 42 of lactation. Initially cows were housed in cubicles and fed ad libitum through Calan doors, on a diet consisting of concentrate and grass silage (Table 1) on a 60:40 dry matter ratio. After day 110 of lactation cows were turned out to pasture but continued to receive concentrates according to milk yield and body condition score. Milk yield and feed intake were recorded daily, milk composition, body weight and body condition score were recorded twice weekly. Health and reproductive status were monitored over the lactation.

scholarly journals Evaluation of Biomarkers of Heat Stress by Using Automatic Health Monitoring System in Dairy Cows

2020 ◽  
Author(s):  
Ramūnas Antanaitis ◽  
Vida Juozaitienė ◽  
Mindaugas Televičius ◽  
Dovilė Malašauskienė
Keyword(s):  
Body Weight ◽  
Heat Stress ◽  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Management Program ◽  
Milk Traits ◽  
Protein Ratio ◽  
Time Body Weight ◽  
Automatic Milking

The objective of this study was to evaluate biomarkers of heat stress (HS) from automatic milking system (AMS), the relationships between measurements of temperature-humidity index (THI) and reticulorumen ph and temperature and some automatic milking systems parameters in dairy cows (rumination time (RT), milk traits, body weight (BW) and consumption of concentrate (CC)) during summer period. The experiment was carried out on a dairy farm at 54.9587408, 23.784146. Lithuanian Black and White dairy cows (n=365) were selected. The cows were milked with Lely Astronaut&reg; A3 milking robots with free traffic. The rations were calculated to meet physiological requirements of the animals. Daily milk yield, rumination time, body weight, milk fat and protein ratio were collected from the Lely T4C management program for analysis. The pH and temperature of the contents of cow reticulorumen were measured using specific smaX-tec boluses manufactured for animal care. The daily humidity and air temperature in the farm zone were obtained from the adjacent weather station (2 km away). According this study during HS, the higher THI had positive correlation with ML, which show tendencies to increase risk of mastitis, and decrease CC, RT, BW, MY, reticulorumen ph and F/P. Some biomarkers of HS can be milk yield, milk lactose, somatic cell count, concentrate conception, rumination time, body weight, reticulorumen ph and milk fat &ndash; protein ratio. We can recommend to monitoring these parameters in the herd management program to identify possibility of heat stress.

scholarly journals The effect of dietary inclusion of barley, unmolassed sugar beet pulp and molasses on milk production, digestibility and digesta passage in dairy cows given silage based diet

1987 ◽  
Vol 59 (2) ◽  
pp. 101-120
Author(s):  
Pekka Huhtanen
Keyword(s):  
Sugar Beet ◽  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Latin Square ◽  
Rapeseed Meal ◽  
Metabolizable Energy ◽  
Sugar Beet Pulp ◽  
Passage Rate ◽  
Beet Pulp

Ten dairy cows in early lactation were given five different supplements with grass silage ad libitum according to two 5x5 Latin square designs. The supplements consisted of barley (Ba), unmolassed sugar beet pulp (SBP) and molasses (Mo) on dry matter (DM) basis as follows: (A) Ba 1000g, (B) Ba 667 g and Mo 326 g, (C) Ba 417 g, SBP 410 g and Mo 163 g, (D) SBP 983 g and (E) 656 g SBP and 326 g Mo per kg. The lower fat content of SBP and molasses than of Ba was balanced with rapeseed oil. These supplements were fed at the level of 6 kg DM/d. In addition, 1 kg of rapeseed meal was given as a protein supplement. No differences in silage DM intake between the Ba and SBP supplements were found, but inclusion of a high level of Mo depressed silage and total DM intake. Cows given SBP supplements yielded 1.1kg (P < 0.01) more milk and 32 g (P < 0.05) more protein than those given Ba supplements. Milk fat concentration was lower (P < 0.001) on SBP (46.0 g/kg) than on Ba diets (49.1 g/kg) and thus there was no difference in the yield of fat corrected milk(FCM) and milk fat between the two supplements. Inclusion of 2 kg of DM of More reduced the milk (P < 0.001), FCM, fat and protein yields (P < 0.01) compared to diets without molasses. Supplement C increased (P < 0.05) the milk yield compared to the other diets but the milk composition was not affected. The effect of supplements on the digestibility of the ration was determined using acid insoluble ash as a marker. The apparent digestibility of organic matter averaged 0.743 and was not significantly affected by the diet. Digestibility of neutral detergent fibre was higher (P < 0.001) for SBP diets (0.680) than for Ba diets (0.596). Similar differences were observed in the digestibility of other fibre components. However, the digestibility of the silage was not affected by the treatment. Feeding SBP diets resulted in lower (P < 0.001) digestibility of crude protein than did Ba diets. Metabolizable energy (ME) of SBP diets tended to be used more efficiently for milk synthesis than ME of Ba diets. Inclusion of Mo in Ba or SBP did not reduce the efficiency, although the milk yield was decreased. The passage rate of liquid was determined with CoEDTA and that of particles with Cr-labelled straw. The average mean retention time of liquid ranged from 18.0 to 19.9 h and that of particles from 36.8 to 37.7h. Neither time was affected by the treatment. The passage rate of particles from the rumen ranged from 0.045 to 0.048 and that of liquid from 0.096 to 0.104, irrespective of the diet.

scholarly journals Feed sorting and intake affected by the physical form and composition of the total mixed ration in dairy cows

2015 ◽  
Vol 16 (3) ◽  
pp. 736-745
Author(s):  
Félix Hilario Diaz González ◽  
Diego Martínez Del Olmo ◽  
Rodrigo Muiño ◽  
José Luis Benedito ◽  
Joaquín Hernández ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Feed Intake ◽  
Milk Fat ◽  
Milk Protein ◽  
Dairy Farm ◽  
Milk Composition ◽  
Fat Percentage ◽  
Total Mixed Ration ◽  
Physical Form

AbstractThis study observes the effects of manipulating the diet in its physical form and in cereal composition of the concentrate on sorting behaviour, feed intake, composition of milk, and degree of discomfort in dairy cows. In a commercial dairy farm with 360 mid-lactation Holstein cows (averaged 105 days), three treatments of feeding handling were applied sequentially during 120 days, each separated by periods of 30 days of resting: (1) Time of chopping of the total mixed ration (TMR): 15min (N= 180) and 23min (N= 180), (2) Physical form of the concentrate: meal (N= 180) and pellet (N= 180), and (3) Cereal composition in the concentrate: mix of corn, barley and wheat in traditional proportions (3.6:1:1) (N= 120), barley only (N= 120) and corn only (N= 120). Animals feeding TMR chopped for 23min selected less and consumed more ration, and had more milk protein and less discomfort than cows feeding TMR chopped for 15min. The physical form of the concentrate, meal or pellet, did not affect feed sorting, but the meal form resulted in greater feed intake and milk fat percentage. The type of cereal in the concentrate did not affect feed sorting but affected feed intake, milk yield and milk composition. In conclusion, it is recommended using TMR chopped during 23min instead of 15min and using the traditional mix of cereals in the concentrate (corn, barn and wheat) instead of using only one cereal.

Morning versus afternoon cutting time of Berseem clover (Trifolium alexandrinum L.) affects feed intake, milk yield and composition in Girgentana goats

2011 ◽  
Vol 78 (4) ◽  
pp. 500-504 ◽  
Author(s):  
Renato Italo Pagano ◽  
Bernardo Valenti ◽  
Anna De Angelis ◽  
Marcella Avondo ◽  
Pietro Pennisi
Keyword(s):  
Body Weight ◽  
Milk Yield ◽  
Feed Intake ◽  
Milk Fat ◽  
Dry Matter ◽  
Nutrient Content ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Trifolium Alexandrinum ◽  
Berseem Clover

Twenty lactating Girgentana goats were used to evaluate the effect of morning v. afternoon cutting time of Berseem clover (Trifolium alexandrinum L.) on feed intake, milk yield and milk composition. Goats were randomly divided into two groups of ten animals, receiving 10 kg of fresh Berseem clover cut at 9.00 (AM group) or 16.00 (PM group), respectively; 500 g of concentrate was given individually to goats before offering forage. Feed intake increased (P<0·01) in the PM group (30·5 v. 25·3 g dry matter/kg body weight), associated with the different nutrient content of diets: lower crude protein but higher dry matter, neutral detergent fibre, water soluble carbohydrates (WSC) and total fatty acids in the PM-harvested forage. Milk production, protein and casein content were higher (P<0·05) in the PM group (1415 g/d, 3·25% and 2·42% v. 1277 g/d, 3·15% and 2·33%, respectively), whereas no differences between groups were detected for milk fat, lactose or urea content. Body weight slowly decreased from the start to the end of the experiment, without differences between groups. This study showed an important milk yield responses in Girgentana goats offered afternoon-cut compared with morning-cut Berseem clover, due to a marked increase in WSC in the afternoon-cut forage.

Sign in / Sign up

Export Citation Format

Share Document