scholarly journals Consequences of Transition Treatments on Fertility and Associated Metabolic Status for Dairy Cows in Early Lactation

Animals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1100 ◽  
Author(s):  
Junnan Ma ◽  
Renny J. van Hoeij ◽  
Rupert M. Bruckmaier ◽  
Akke Kok ◽  
Theo J. G. M. Lam ◽  
...  
Keyword(s):  
Energy Level ◽  
Dairy Cows ◽  
Metabolic Status ◽  
Positive Energy ◽  
Dietary Energy ◽  
Early Lactation ◽  
Positive Energy Balance ◽  
Days Open ◽  
Plasma Metabolite ◽  
Ovarian Cyclicity

This study aimed to (1) investigate effects of reducing postpartum dietary energy level for cows after a 0-d dry period (DP) on resumption of ovarian cyclicity and reproductive performance, (2) relate days open with other reproductive measures, and (3) relate onset of luteal activity (OLA) and days open with metabolic status in early lactation. Holstein-Friesian dairy cows were randomly assigned to 1 of 3 transition treatments: no DP and low postpartum dietary energy level from 22 days in milk( DIM )onwards (0-d DP (LOW)) (n = 42), no DP and standard postpartum dietary energy level (0-d DP (STD)) (n = 43), and a short DP and standard postpartum dietary energy level (30-d DP (STD)) (n = 43). Milk progesterone concentration was determined three times per week until 100 DIM. Plasma metabolite and hormone concentrations were measured weekly until week 7 postpartum. Reducing postpartum dietary energy level in older cows (parity ≥ 3) after no DP and 22 DIM did not affect milk production but prevented a positive energy balance and shortened the interval from calving to OLA. In addition, services per pregnancy and days open were reduced in cows of parity ≥ 3 on 0-d DP (LOW), compared with cows of parity ≥ 3 with 0-d DP (STD), but not in cows of parity 2.

scholarly journals Proteome dataset of liver from dairy cows experiencing negative or positive energy balance at early lactation

Data in Brief ◽  
2021 ◽  
pp. 107517
Author(s):  
Turner H. Swartz ◽  
Uzi Moallem ◽  
Hadar Kamer ◽  
Gitit Kra ◽  
Yishai Levin ◽  
...  
Keyword(s):  
Energy Balance ◽  
Dairy Cows ◽  
Positive Energy ◽  
Early Lactation ◽  
Positive Energy Balance

scholarly journals Effects of dry period length and dietary energy source on metabolic status and hepatic gene expression of dairy cows in early lactation

2015 ◽  
Vol 98 (2) ◽  
pp. 1033-1045 ◽  
Author(s):  
J. Chen ◽  
J.J. Gross ◽  
H.A. van Dorland ◽  
G.J. Remmelink ◽  
R.M. Bruckmaier ◽  
...  
Keyword(s):  
Gene Expression ◽  
Energy Source ◽  
Dairy Cows ◽  
Period Length ◽  
Metabolic Status ◽  
Hepatic Gene Expression ◽  
Dietary Energy ◽  
Early Lactation ◽  
Dry Period

scholarly journals Effect of precalving and postcalving dietary energy level on performance and blood metabolite concentrations of dairy cows throughout lactation

2011 ◽  
Vol 94 (2) ◽  
pp. 808-823 ◽  
Author(s):  
R.A. Law ◽  
F.J. Young ◽  
D.C. Patterson ◽  
D.J. Kilpatrick ◽  
A.R.G. Wylie ◽  
...  
Keyword(s):  
Energy Level ◽  
Dairy Cows ◽  
Dietary Energy ◽  
Blood Metabolite ◽  
Metabolite Concentrations

scholarly journals Determination metabolic and nutritional status in dairy cows during early and mid lactation

2016 ◽  
Vol 32 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Radojica Djokovic ◽  
Zoran Ilic ◽  
Vladimir Kurcubic ◽  
Milan Petrovic ◽  
Violeta Caro-Petrovic ◽  
...  
Keyword(s):  
Blood Serum ◽  
Dairy Cows ◽  
Metabolic Status ◽  
Early Lactation ◽  
Serum Concentrations ◽  
Nonesterified Fatty Acids ◽  
Lactating Cows ◽  
Lower Blood ◽  
Positive Correlations ◽  
Beta Hydroxybutyrate

The objective of the present study was to investigate nutritional and metabolic status in Simmental cows during early and mid-lactation. Fifteen early lactating cows and 15 mid lactating cows were chosen for the investigation. Blood samples were collected to measure beta-hydroxybutyrate (BHB), nonesterified fatty acids (NEFA), triglycerides (TG), glucose and the activity of aspartate transaminase (AST). Early lactation as compared to mid lactating cows were found to have significantly higher (P<0.05) blood serum concentrations of NEFA, BHB and AST and lower blood serum concentrations of glucose (P<0.05) and TG (P>0.05). Significantly negative correlations were observed between BHB and glucose (P<0.01), BHB and TG (P<0.05), NEFA and glucose (P<0.05). Significantly positive correlations were observed between NEFA and BHB (P<0.05), NEFA and AST (P<0.05), glucose and TG (P<0.01). The results suggest that these parameters can serve as useful indicators of the nutritional and metabolic status of dairy cows during lactation.

Physiological and genetic differences between low and high index dairy cows

2001 ◽  
Vol 26 (1) ◽  
pp. 223-236 ◽  
Author(s):  
M. C. Lucy ◽  
B. A. Crooker
Keyword(s):  
Energy Balance ◽  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Production ◽  
Negative Energy ◽  
High Index ◽  
Negative Energy Balance ◽  
Positive Energy ◽  
Serum Concentrations ◽  
Days Open

AbstractSelection of dairy cattle for increased milk production has decreased some indices of reproductive efficiency. For example, days open are increased by one day for every 100 kg of increased milk yield per lactation. Some of the change in days open can be explained by delayed onset of oestrous cyclicity and lower conception rate to artificial insemination in cows with greater milk production. Despite these negative associations between milk production and reproduction, reproduction in herds of high producing dairy cattle is not necessarily compromised relative to reproduction in herds of low producing dairy cattle. This is because there is a large environmental effect on dairy reproduction. High producing herds generally have better management and better oestrous detection. Therefore, high producing dairy herds may partially overcome the antagonistic relationship between milk production and reproduction. Physiological mechanisms that lead to poorer reproduction in high producing cows are partially defined. Negative energy balance that occurs in high producing dairy cows can be associated with a delay in the initiation of ovarian cycles and the interval to first breeding. Many of the effects of negative energy balance on postpartum reproduction can be explained by decreased serum luteinizing hormone (LH) that is associated with negative energy balance. Serum LH increases as cows move toward positive energy balance and greater LH stimulates growth and ovulation of ovarian follicles. We have initiated studies to address physiological differences in high and low index dairy cows. The reproductive endocrinology of cows from a control line (5,900 kg milk/lactation) and a select line (10,900 kg milk/lactation) of dairy cows at the University of Minnesota was studied over a two-year period. Cows in Year 1 were similar for serum concentrations of LH, follicle stimulating hormone (FSH), and oestradiol (preovulatory period). In both years, serum concentrations of progesterone during luteal phases, however, were decreased in select cows. The Year 2 cows also had a delay in the return to oestrous cyclicity that was associated with reduced LH. The possibility that decreased progesterone causes infertility in dairy cows will require further study. Collectively, these data suggest that changes in blood progesterone concentrations may explain, partially, lower fertility in high index dairy cows.

scholarly journals Dietary Energy Source in Dairy Cows in Early Lactation: Energy Partitioning and Milk Composition

2007 ◽  
Vol 90 (3) ◽  
pp. 1467-1476 ◽  
Author(s):  
A.T.M. van Knegsel ◽  
H. van den Brand ◽  
J. Dijkstra ◽  
W.M. van Straalen ◽  
M.J.W. Heetkamp ◽  
...  
Keyword(s):  
Energy Source ◽  
Dairy Cows ◽  
Milk Composition ◽  
Energy Partitioning ◽  
Dietary Energy ◽  
Early Lactation

Influence of Different Levels of Dietary Energy on Performance of Double Suckled Cows and Calves

1986 ◽  
Vol 1986 ◽  
pp. 106-106
Author(s):  
M.A.S. Khan ◽  
J.H. Topps ◽  
P.J. Broadbent
Keyword(s):  
Dairy Cows ◽  
Good Condition ◽  
Beef Cows ◽  
Free Access ◽  
Dietary Energy ◽  
Early Lactation ◽  
Concentrate Mixture ◽  
Soyabean Meal ◽  
Ad Libitum ◽  
Different Levels

The winter feeding of beef cows represents a high, proportion of the costs of calf production. Attempts to minimise cost include the use of beef (♂) x dairy cows (♀) which have the ability to suckle two calves and to mobilise body reserves during periods of underfeeding in early lactation. Khan and Topps (1985) observed that cows in good condition at calving could maintain milk production and raise two good calves when given 110 MJ ME/day in a diet which included a source of undegradable protein. Subsequently a preliminary experiment was carried out with three single suckled and nine double suckled cows to examine the effect of energy level on the performance of cows and calves.Three single suckled cows and nine double suckled cows i.e. six with a natural plus foster calf and three with twin calves produced by embryo transfer were used in this experiment. The levels of energy that were examined were 70 or 90, 80 or 100 and 90 or 110 MJ ME/day for single and double-suckled cows respectively, supplied in diets containing ammonia treated straw, barley and fishmeal. Nine of the cows were placed into trios according to calving date and age, with a trio consisting of a cow with a natural calf, a cow with a natural and foster calf, and a cow with twin calves. Each trio was allocated at random to one of the three levels of energy. Similarly, the remaining three cows with a natural and foster calf were allocated at random to 90, 100 or 110 MJ ME/day. The calves were given good quality hay ad libitum and free access to a concentrate mixture up to a maximum intake of 2 kg/head/day. The concentrate mixture consisted of (g/kg) 800 barley, 150 soyabean meal and 50 molassine meal. The experiment started on the 22nd day of lactation and was of 20 weeks duration for most of the cows.

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