scholarly journals Inclusion of Direct-Fed Microbials in Lactating Dairy Cow Diets

EDIS ◽  
2022 ◽  
Vol 2021 (6) ◽  
Author(s):  
S. L. Bennett ◽  
Antonio Faciola
Keyword(s):  
Dairy Cows ◽  
Dairy Cow ◽  
Modes Of Action ◽  
Lactating Dairy Cows ◽  
Animal Sciences

This report summarizes the information relating to the usage of direct-fed microbials, such as their modes of action and effectiveness in lactating dairy cows. Written by S. L. Bennett and A. P. Faciola, and published by the UF/IFAS Department of Animal Sciences, December 2021.

scholarly journals Economic Evaluation of Dairy Cow Stocking Density

EDIS ◽  
2018 ◽  
Vol 2018 (4) ◽  
Author(s):  
Albert De Vries ◽  
Haile Dechassa ◽  
Henk Hogeveen
Keyword(s):  
Economic Evaluation ◽  
Dairy Cows ◽  
Dairy Cow ◽  
Transition Period ◽  
Stocking Density ◽  
Optimal Number ◽  
Maximum Profit ◽  
Lactating Dairy Cows ◽  
De Vries ◽  
Animal Sciences

What is the optimal number of dairy cows in a pen after their transition period? This 4-page document discusses the economically optimal stocking density for lactating dairy cows, measured as maximum profit per stall. It also introduces a spreadsheet that can be used to calculate the effects of various inputs on the economically optimal stocking density. Written by Albert De Vries, Haile Dechassa, and Henk Hogeveen, and published by the UF/IFAS Department of Animal Sciences, August 2018. http://edis.ifas.ufl.edu/an346

The effect of asynchronous diets on the function of the rumen in the lactating dairy cow

1998 ◽  
Vol 1998 ◽  
pp. 19-19
Author(s):  
A.R. Henderson ◽  
P.C. Garnsworthy ◽  
J.R. Newbold ◽  
P.J. Buttery
Keyword(s):  
Protein Synthesis ◽  
Dairy Cows ◽  
Dairy Cow ◽  
Production Performance ◽  
Early Lactation ◽  
Microbial Protein ◽  
Nutrient Flows ◽  
Lactating Dairy Cows ◽  
Overall Efficiency ◽  
Fermentation Parameters

Sinclair et al. (1993) found that a diet formulated to be synchronous with regard to hourly release of nitrogen and energy increased microbial protein synthesis by 14% in sheep. Dairy cows in early lactation experience a shortfall of energy and protein, with available protein determining the overall efficiency of metabolism (MacRae and Lobley, 1986) and subsequent milk production. It is therefore necessary to maximise microbial protein yield during this period. In this study diets were designed for lactating dairy cows to contain the same feed ingredients, but to release nitrogen and energy in the rumen at different times. Rumen fermentation parameters, nutrient flows to the small intestine and production performance were investigated.

Replacement of soyabean meal by barley or wheat distillers grains for lactating dairy cows

2002 ◽  
Vol 2002 ◽  
pp. 108-108
Author(s):  
J.D. Sutton ◽  
D.J. Humphries ◽  
R H Phipps ◽  
M. Witt
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Dairy Cow ◽  
Present Experiment ◽  
Distillers Grains ◽  
Complete Replacement ◽  
Lactating Dairy Cows ◽  
Soyabean Meal

The complete replacement of soyabean meal by maize distillers grains (MDG) in dairy cow diets had no significant effects on milk production, rumen digestion or the supply of non-ammonia N to the duodenum (Sutton et al., 2000; Phipps et al., 2001). The present experiment was designed to extend this work by examining the response when barley (BDG) or wheat (WDG) distillers grains replaced soyabean meal.

INDUCTION OF CYCLIC ACTIVITY IN THE EARLY POSTPARTUM DAIRY COW

1976 ◽  
Vol 56 (3) ◽  
pp. 467-473 ◽  
Author(s):  
J. G. MANNS ◽  
G. RICHARDSON
Keyword(s):  
Dairy Cows ◽  
Dairy Cow ◽  
Saline Control ◽  
Cyclic Activity ◽  
Blood Samples ◽  
Important Constraint ◽  
Lactating Dairy Cows ◽  
Early Postpartum ◽  
Prostaglandin F ◽  
Estradiol 17Β

Twenty-five lactating dairy cows were treated with either saline (control), 500 μg gonadotropin-releasing hormone (GnRH), GnRH + 10 mg estradiol 17β (E2), E2, or GnRH + E2 + 25 mg prostaglandin F2α (PGF2α) at approximately 11 days postpartum. Blood samples were taken at the time of injection and then twice each week for about 30 days. Treatment with GnRH alone gave the largest LH peak; LH production appeared to be inhibited when E2 was given with GnRH. Plasma estrogen concentrations were above 1 ng/ml for 12 h in all animals receiving estrogen alone or in combination. None of the treatments hastened initiation of cyclic activity which began at an average of 19 days postpartum. It seems unlikely that postpartum anestrus is an important constraint to early rebreeding in dairy cows.

Effects of feeding anionic products to non-lactating dairy cows on urine pH

2003 ◽  
Vol 83 (3) ◽  
pp. 609-612 ◽  
Author(s):  
K. A. Beauchemin ◽  
G. R. Bowman ◽  
L. M. Rode ◽  
M. A. G. von Keyserlingk
Keyword(s):  
Dairy Cows ◽  
Key Words ◽  
Dairy Cow ◽  
Urine Ph ◽  
Once Daily ◽  
Urine Acidification ◽  
Lactating Dairy Cows

Anionic products (anionic salts, Bio-Chlor™, Nutri-Chlor™, and SoyChlor 16-7™ ) were fed to 12 non-lactating dairy cows and urine pH was monitored. The products differed in their effectiveness: anionic salts, Bio-Chlor, and Nutri-Chlor lowered urine pH, but SoyChlor was not effective. For cows fed once daily, checking urine pH 12 to 18 h after feeding is most likely to indicate nadir pH. Key words: Dietary cation-anion difference, urine acidification, urine pH, dairy cow, non-lactating

Impact of circulating concentrations of progesterone and antral age of the ovulatory follicle on fertility of high-producing lactating dairy cows

2012 ◽  
Vol 24 (1) ◽  
pp. 267 ◽  
Author(s):  
J. Richard Pursley ◽  
Joäo Paulo N. Martins
Keyword(s):  
Dairy Cows ◽  
Dairy Cow ◽  
Gonadotropin Releasing Hormone ◽  
Oestrous Cycle ◽  
Dairy Production ◽  
Management Issue ◽  
Lactating Dairy Cows ◽  
Ovulatory Follicle ◽  
The World ◽  
Conception Rates

Dairy cow infertility negatively affects profit of dairy production enterprises around the world, and enhancing conception rates of dairy cows is a critical management issue to resolve. It appears that conception rates of dairy cows are attenuated due to reduced progesterone concentrations in circulation during growth of the ovulatory follicle. It is not clear how reduced progesterone influences fertility, but data presented in this brief review suggest that it can be somewhat reversed through increasing concentrations of progesterone during the growth of the ovulatory follicle before luteolysis. Ovsynch protocols may be utilised to enhance progesterone concentrations through the induction of an accessory corpus luteum (CL) following the initial gonadotropin-releasing hormone (GnRH) treatment. Cows at Day 13 of the oestrous cycle with a 7-day-old accessory CL had ~50% more progesterone at the time of prostaglandin injection of Ovsynch compared with cows with only a Day 13 CL. Ovsynch can consistently induce an accessory CL following the initial GnRH treatment if cows are on Days 6 or 7 of the oestrous cycle at the time of treatment. Pre-synchrony strategies are critical to enhance the probability that cows will be on Days 6 or 7 at first GnRH treatement of Ovsynch.

Replacement of concentrates with molasses in grass silage based diets for dairy cows

1996 ◽  
Vol 1996 ◽  
pp. 6-6
Author(s):  
E J McKendrick ◽  
S P Marsh
Keyword(s):  
Dairy Cows ◽  
Dairy Cow ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Rumen Microbes ◽  
Grass Silage ◽  
Lactating Dairy Cows ◽  
Metabolisable Energy ◽  
Effective Source ◽  
Degradable Protein

Provision of a balanced supply of fermentable metabolisable energy (FME) and effective rumen degradable protein to rumen microbes enables maximum utilisation of energy and protein in dairy cow diets. Cane molasses containing a high proportion of water soluble carbohydrates can be very effective source of FME in dairy cow diets. The objective of this experiment was to evaluate the effect of the inclusion of molasses and fishmeal in the concentrate component of the diet, on the performance of lactating dairy cows.

The effect of asynchronous diets on the function of the rumen in the lactating dairy cow

1998 ◽  
Vol 1998 ◽  
pp. 19-19 ◽  
Author(s):  
A.R. Henderson ◽  
P.C. Garnsworthy ◽  
J.R. Newbold ◽  
P.J. Buttery
Keyword(s):  
Protein Synthesis ◽  
Dairy Cows ◽  
Dairy Cow ◽  
Production Performance ◽  
Early Lactation ◽  
Microbial Protein ◽  
Nutrient Flows ◽  
Lactating Dairy Cows ◽  
Overall Efficiency ◽  
Fermentation Parameters

Sinclair et al. (1993) found that a diet formulated to be synchronous with regard to hourly release of nitrogen and energy increased microbial protein synthesis by 14% in sheep. Dairy cows in early lactation experience a shortfall of energy and protein, with available protein determining the overall efficiency of metabolism (MacRae and Lobley, 1986) and subsequent milk production. It is therefore necessary to maximise microbial protein yield during this period. In this study diets were designed for lactating dairy cows to contain the same feed ingredients, but to release nitrogen and energy in the rumen at different times. Rumen fermentation parameters, nutrient flows to the small intestine and production performance were investigated.

The effects of ensiling on the intake of herbage and milk production by lactating dairy cows

1993 ◽  
Vol 1993 ◽  
pp. 20-20 ◽  
Author(s):  
T. W. J. Keady ◽  
J. J. Murphy
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Dairy Cow ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Factors Affecting ◽  
Grass Silage ◽  
Lactating Dairy Cows ◽  
Dairy Animals ◽  
Per Se

In general cows have higher intakes and higher milk yields when outdoors grazing pasture compared to indoors consuming grass silage. However, this observation is not valid as a direct comparison of grass and silage due to the following reasons. Firstly, the cows consuming the silage and grass are usually at different stages of lactation and secondly the silage has not been produced from the herbage being grazed. There is little information available in the literature comparing the intakes of grass and silage harvested from the same sward at the same stage of maturity when fed to lactating dairy animals at similar stages of lactation. The present study was initiated as part of a series of studies at this Institute, to evaluate factors affecting silage intake. The main aims of this study were to determine the actual effect which ensiling “per se” had firstly on dry matter intake and secondly on animal performance by the lactating dairy cow.

scholarly journals Acidification of urine by feeding anionic products to non-lactating dairy cows

2003 ◽  
Vol 83 (2) ◽  
pp. 319-321 ◽  
Author(s):  
G. R. Bowman ◽  
K. A. Beauchemin ◽  
L. M. Rode
Keyword(s):  
Dairy Cows ◽  
Key Words ◽  
Dairy Cow ◽  
Urine Ph ◽  
Total Mixed Ration ◽  
Temporal Effects ◽  
Lactating Dairy Cows

Three commercial anionic products (Bio-Chlor MM™, Bio-Chlor FR™ and SoyChlor 16-7™) were fed to non-lactating dairy cows in a total mixed ration (TMR). After the anionic products were included in the TMR at the manufacturers’ recommendations for 4-d, all products reduced urine pH below the desired threshold of 6.5. The rate at which the products reached nadir urine pH differed among the products, but once acidification was accomplished temporal effects on pH were minimal. Key words: Urine pH, dietary cation-anion difference, prepartum, dairy cow, non-lactating

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