Effects of feeding propylene glycol on dry matter intake, lactation performance, energy balance and blood metabolites in early lactation dairy cows

This study evaluated the effects of alkyl polyglycoside (APG), which is a non-ionic surfactant, on lactation performance, nutrient digestibility and blood metabolites in dairy cows. Twenty dairy cows were randomly divided into four groups and fed a basal diet that included pelleted concentrate, distillers grains, and fresh limpograss. The four treatments included 0, 5.5, 11 and 22 mL APG per kg of pelleted concentrate on a dry matter basis; treatments were defined as APG0, APG5.5, APG11, and APG22, respectively. Dry matter intake was not affected by APG supplementation. There was an increase in milk yield (from 13.96 to 16.71 kg/day) and increases in milk fat (quadratic, p = 0.04), protein (quadratic, p = 0.10), and lactose concentrations (linear, p = 0.07) with increasing APG supplementation. In addition, APG supplementation increased (p ≤ 0.03) the milk fat, protein, solid non-fat, and total solid yields, while the lactose yield increased (linear, p = 0.01) as the APG level increased. Dietary APG supplementation had no effect on nutrient digestibility and blood metabolites. It was concluded that the addition of APG at doses up to 22 mL/kg of pelleted concentrate had positive effects on the milk composition in dairy cows.

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Diet supplementation of palm fat powder and coated folic acid on performance, energy balance, nutrient digestion, ruminal fermentation and blood metabolites of early lactation dairy cows

Animal Feed Science and Technology ◽

10.1016/j.anifeedsci.2020.114520 ◽

2020 ◽

Vol 265 ◽

pp. 114520 ◽

Cited By ~ 1

Author(s):

Z. Zhang ◽

S.K. La ◽

G.W. Zhang ◽

H.S. Du ◽

Z.Z. Wu ◽

...

Keyword(s):

Folic Acid ◽

Energy Balance ◽

Dairy Cows ◽

Blood Metabolites ◽

Early Lactation ◽

Ruminal Fermentation ◽

Nutrient Digestion ◽

Diet Supplementation

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Pasture allowance and duration: the effect of restriction on dry-matter intake, energy balance and indicators of metabolic health in early lactation dairy cows

Animal Production Science ◽

10.1071/an20066 ◽

2021 ◽

Vol 61 (1) ◽

pp. 17

Author(s):

Aisling Claffey ◽

Luc Delaby ◽

Eva Lewis ◽

Tommy M. Boland ◽

Norann Galvin ◽

...

Keyword(s):

Energy Balance ◽

Dairy Cow ◽

Dry Matter ◽

Climatic Factors ◽

Metabolic Health ◽

Dry Matter Intake ◽

Control Treatment ◽

Early Lactation ◽

Short Term ◽

Grass Growth

Context Pasture allowance (PA) in early lactation is widely acknowledged to influence animal performance; however, climatic factors can limit grass growth in early spring, resulting in potential feed deficits on farm. Aim The present study determined whether PA restrictions imposed in early lactation impair energy balance and metabolic health of the cow. Methods One hundred and five cows were assigned to one of seven grazing treatments from 14 March to 4 July 2016 (16 weeks). The control-treatment cows were offered a PA to achieve a post-grazing sward height of 3.5 cm. The cows on the remaining treatments were offered a PA representing 60% of that offered to the control cows for a duration of 2 or 6 weeks from 14 March (mid-March; MMx2 and MMx6), 28 March (end-March; EMx2 and EMx6) or 11 April (mid-April; MAx2 and MAx6). Measurements were collected over the final 2-week period of the restriction for each individual restricted treatment and the control treatment. Key results Restricting PA in early lactation (34–88 days in milk) resulted in a mean reduction in dry-matter intake (DMI) of 25%; however, DMI as a proportion of the control treatment declined for EMx6 (75% of control DMI achieved) and MAx6 (65%) compared with the MMx6 (78%), which may be attributable to changes in the sward, as the plant changes from the vegetative to reproductive phase during this period. The reduction in milk production, relative to the control treatment, was similar among all restricted treatments (18%), resulting in a 1.1-kg reduction in milk output per 1-kg reduction in DMI. However, there was no effect of PA restriction or duration on body condition score, energy balance or blood metabolites, suggesting that the animals used in the current study made sufficient physiological adaptions to partition energy for the maintenance of body reserves. Conclusion In conclusion, short-term restrictions of PA up to 25% of DMI, for up to 6 weeks, can be used as a management strategy to cope with feed deficits in early lactation without impairing normal metabolic function of the early lactation dairy cow. Implications The results of the present study identified the ability of the early lactation dairy cow at grass to adapt to short-term deficits in pasture availability, without affecting the metabolic functioning of the animals

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The effect of rumen-protected methionine and choline on plasma metabolites of Holstein dairy cows

The Journal of Agricultural Science ◽

10.1017/s0021859610001292 ◽

2011 ◽

Vol 149 (5) ◽

pp. 639-646 ◽

Cited By ~ 7

Author(s):

M. ARDALAN ◽

M. DEHGHAN-BANADAKY ◽

K. REZAYAZDI ◽

N. GHAVI HOSSEIN-ZADEH

Keyword(s):

Dairy Cows ◽

Dry Matter ◽

Dry Matter Intake ◽

Plasma Metabolites ◽

Lactation Performance ◽

Plasma Nefa ◽

Plasma Urea ◽

Nonesterified Fatty Acids ◽

Plasma Triglycerides ◽

Holstein Dairy Cows

SUMMARYForty Holstein dairy cows in their first and second lactations were used from 4 weeks prepartum to 10 weeks postpartum to investigate the effects of feeding ruminally protected methionine and choline on plasma metabolites. Cows were randomly assigned to one of the following treatments in a 2×2 factorial design 4 weeks before their expected calving dates, using randomized blocks based on parity: no supplement (control), 18 g/d of rumen-protected methionine (RPM) product, 60 g/d of rumen-protected choline (RPC) product, or 18 g/d of RPM+60 g/d of RPC. Treatments did not affect plasma triglycerides, glucose, total protein, nonesterified fatty acids (NEFA), β-hydroxybutyrate (BHBA), plasma urea nitrogen (PUN) or aspartate aminotransferase (AST) during the prepartum period. For postpartum plasma NEFA concentrations, there were interactions between RPC or RPM and week postpartum. Feeding RPM increased plasma AST concentrations (P<0·05) and decreased plasma protein concentrations (P<0·05) in postpartum cows. After calving, feeding RPC increased (P<0·05) dry matter intake (DMI), milk yield, 40 g/kg fat-corrected milk (FCM) yield and energy-corrected milk (ECM) yield. This suggests that supplemental RPC can improve lactation performance of dairy cows.

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Hipocalcemia e cetose - principais doenças metabólicas da vaca leiteira durante o período de transição - uma revisão de literatura

Revista Agraria Academica ◽

10.32406/v4n5/2021/130-141/agrariacad ◽

2021 ◽

Vol 4 (5) ◽

pp. 130-141

Author(s):

Mylena Garcia Proto ◽

◽

Milena Cristina Bernardo de Barros ◽

Bruna Stanigher Barbosa ◽

◽

...

Keyword(s):

Energy Balance ◽

Energy Expenditure ◽

Dairy Cows ◽

Dry Matter ◽

Transition Period ◽

Negative Energy ◽

Dry Matter Intake ◽

Economic Losses ◽

Balance State ◽

Production Demand

With the increased production demand in the dairy industry comes the need to keep animals healthier, thus avoiding large economic losses due to low productivity. During the transition period, dairy cows are susceptible to the onset of infectious diseases and metabolic imbalances due to the big change in their diet, it could be poor in needed nutrients to maintain the animal's body score, with this, the dry matter intake decreases up to 40% while energy expenditure increases due to milk and colostrum production, getting into a negative energy balance state.

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Effects of replacing barley/soya with malt distillers grains (draff) in silage based complete diets for dairy cows

Proceedings of the British Society of Animal Production (1972) ◽

10.1017/s0308229600010576 ◽

1989 ◽

Vol 1989 ◽

pp. 64-64

Author(s):

J J Hyslop ◽

D J Roberts

Keyword(s):

Dairy Cows ◽

Dry Matter ◽

Previous Experiment ◽

Distillers Grains ◽

Dry Matter Intake ◽

Design Experiment ◽

Early Lactation ◽

Grass Silage ◽

Ad Libitum ◽

Friesian Cows

In a previous experiment outlined at last year's conference (Hyslop and Roberts, 1988), it was demonstrated that replacement of a proprietary pelleted concentrate with malt distillers grains (draff), should be limited to 15% of total dry matter intake (DMI) when draff is offered in two feeds per day. However there is little evidence to validate such a limitation when draff is used as a concentrate replacement in complete diets. This experiment examined the effect of replacing barley/soya with draff plus additional minerals in silage based complete diets.In a cyclic changeover design experiment consisting of 4 three week periods, fifteen British Friesian cows in early lactation were offered five treatments. Cows were given ad libitum access to one of five complete diets based on grass silage (69 “D”). Draff plus additional minerals gradually replaced barley/soya at increasing rates in diets 0-4 respectively.

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