Influence of diet composition, dry-matter intake, milk production and energy balance on time of post-partum ovulation and fertility in dairy cows

1992 ◽  
Vol 54 (3) ◽  
pp. 323-331 ◽  
Author(s):  
M. C. Lucy ◽  
C. R. Staples ◽  
W. W. Thatcher ◽  
P. S. Erickson ◽  
R. M. Cleale ◽  
...  
Keyword(s):  
Energy Balance ◽  
Dry Matter ◽  
Ovarian Function ◽  
Post Partum ◽  
Food Additives ◽  
Dry Matter Intake ◽  
Holstein Friesian ◽  
Days Open ◽  
Post Partum Period ◽  
Friesian Cows

AbstractLactating Holstein-Friesian cows from two calving groups (no. = 90) were studied during the early post-partum period to determine the effect of dry-matter intake (DM1), 40 g/kg fat-corrected milk (FCM) production, energy balance (EB), parity, and food additives (calcium salts of long-chain fatty acids [CaLCFA] and niacin) on the recrudescence of ovarian function and establishment of pregnancy. Cows that ovulated early during the post-partum period (15 to 21 days after calving) consumed more food and tended to produce more FCM compared with cows ovulating later (22 to 42 days or after 42 days). Primiparous cows had lower EB and tended to have longer intervals to first ovulation compared with multiparous cows but the average interval to pregnancy was similar for primiparous and multiparous cows. Feeding CaLCFA tended to extend the interval to first service and decreased pregnancy rate. Production characteristics (including DMI and FCM production) seem to determine interval from calving to first ovulation as well as interval from calving to pregnancy (days open). Fertility was affected negatively by feeding CaLCFA.

Energy balance of lactating cows given diets of grass silage and whole crop wheat

1996 ◽  
Vol 1996 ◽  
pp. 45-45
Author(s):  
S.B.Cammell ◽  
J.D.Sutton ◽  
D.J.Humphries ◽  
R.H.Phipps ◽  
D.E.Beever
Keyword(s):  
Energy Balance ◽  
Crude Protein ◽  
Dry Matter ◽  
Previous Experiment ◽  
Latin Square ◽  
Grass Silage ◽  
Lactating Cows ◽  
The Poor ◽  
Holstein Friesian ◽  
Friesian Cows

A previous experiment (Sutton, Abdalla, Phipps, Cammell and Humphries, 1995) showed that low digestibility is a major cause of the poor utilisation of urea-treated whole crop wheat (WCW) by lactating cows. The purpose of the present experiment was to examine energy balance in more detail by means of indirect calorimetry.Four multiparous Holstein-Friesian cows were offered diets based on spring wheat (cv Axona), harvested on 11 August at 603 g dry matter (DM)/kg and preserved with 20 or 40 g urea/kgDM (WCW-20, WCW-40), and first-cut perennial ryegrass silage (GS). For GS, WCW-20 and WCW-40 respectively, DM was 213, 801 and 712 g/kg; crude protein (CP) 124, 163 and 171 g/kg DM; ammonia-N 3.1, 4.6 and 7.6 g/kg DM; pH 3.9, 6.7 and 7.2. The cows were offered four diets in a 4 X 4 latin square with 4-week periods starting 10 weeks after calving. In week 4 of each period urine and faeces were collected for 6 days and gas exchange was measured for 3 days in respiration chambers.

Energy balance of lactating cows given diets of grass silage and whole crop wheat

1996 ◽  
Vol 1996 ◽  
pp. 45-45
Author(s):  
S.B.Cammell ◽  
J.D.Sutton ◽  
D.J.Humphries ◽  
R.H.Phipps ◽  
D.E.Beever
Keyword(s):  
Energy Balance ◽  
Crude Protein ◽  
Dry Matter ◽  
Previous Experiment ◽  
Latin Square ◽  
Grass Silage ◽  
Lactating Cows ◽  
The Poor ◽  
Holstein Friesian ◽  
Friesian Cows

A previous experiment (Sutton, Abdalla, Phipps, Cammell and Humphries, 1995) showed that low digestibility is a major cause of the poor utilisation of urea-treated whole crop wheat (WCW) by lactating cows. The purpose of the present experiment was to examine energy balance in more detail by means of indirect calorimetry.Four multiparous Holstein-Friesian cows were offered diets based on spring wheat (cv Axona), harvested on 11 August at 603 g dry matter (DM)/kg and preserved with 20 or 40 g urea/kgDM (WCW-20, WCW-40), and first-cut perennial ryegrass silage (GS). For GS, WCW-20 and WCW-40 respectively, DM was 213, 801 and 712 g/kg; crude protein (CP) 124, 163 and 171 g/kg DM; ammonia-N 3.1, 4.6 and 7.6 g/kg DM; pH 3.9, 6.7 and 7.2. The cows were offered four diets in a 4 X 4 latin square with 4-week periods starting 10 weeks after calving. In week 4 of each period urine and faeces were collected for 6 days and gas exchange was measured for 3 days in respiration chambers.

scholarly journals External validation of the GrazeIn model of pasture dry matter intake and milk yield prediction for cows managed at different calving dates and stocking rates

2018 ◽  
Vol 15 (4) ◽  
pp. e0608
Author(s):  
Ana I. Roca-Fernández ◽  
Antonio González-Rodríguez
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
External Validation ◽  
Dry Matter Intake ◽  
Holstein Friesian ◽  
Grazing System ◽  
The Mean ◽  
Using Data ◽  
Stocking Rates ◽  
Friesian Cows

The aim was to evaluate the prediction accuracy of pasture dry matter intake (PDMI) and milk yield (MY) predicted by the GrazeIn model using a database representing 124 PDMI measurements at paddock level and 2232 MY measurements at cow level. External validation of the model was conducted using data collected from a trial carried out with Holstein-Friesian cows (n=72) while grazed 28 paddocks and were managed in a 2×2 factorial design by considering two calving dates (CD), with different number of days in milk (DIM), early (E, 29 DIM) vs. middle (M, 167 DIM), and two stocking rates (SR), medium (M, 3.9 cows ha-1) vs. high (H, 4.8 cows ha-1), under a rotational grazing system. Cows were randomly assigned to four grazing scenarios (EM, EH, MM and MH). The mean observed PDMI of the total database was 14.2 kg DM cow-1 day-1 while GrazeIn predicted a mean PDMI for the database of 13.8 kg DM cow-1 day-1. The mean bias was −0.4 kg DM cow-1 day-1. GrazeIn predicted PDMI for the total database with a relative prediction error (RPE) of 10.0% at paddock level. The mean observed MY of the database was 23.2 kg cow-1 day-1 while GrazeIn predicted a MY for the database of 23.1 kg cow-1 day-1. The mean bias was –0.1 kg cow-1 day-1. GrazeIn predicted MY for the total database with a mean RPE of 17.3% at cow level. For the scenarios investigated, GrazeIn predicted PDMI and MY with a low level of error which made it a suitable tool for decision support systems.

scholarly journals Influence of energy balance on the antimicrobial peptides S100A8 and S100A9 in the endometrium of the post-partum dairy cow

Reproduction ◽  
2013 ◽  
Vol 145 (5) ◽  
pp. 527-539 ◽  
Author(s):  
Theerawat Swangchan-Uthai ◽  
Qiusheng Chen ◽  
Sally E Kirton ◽  
Mark A Fenwick ◽  
Zhangrui Cheng ◽  
...  
Keyword(s):  
Energy Balance ◽  
Antimicrobial Peptides ◽  
Post Partum ◽  
Negative Energy ◽  
Uterine Involution ◽  
Subsequent Fertility ◽  
Holstein Friesian ◽  
Uterine Inflammation ◽  
Strong Staining ◽  
Friesian Cows

Uterine inflammation occurs after calving in association with extensive endometrial remodelling and bacterial contamination. If the inflammation persists, it leads to reduced fertility. Chronic endometritis is highly prevalent in high-yielding cows that experience negative energy balance (NEB) in early lactation. This study investigated the effect of NEB on the antimicrobial peptides S100A8 and S100A9 in involuting uteri collected 2 weeks post partum. Holstein-Friesian cows (six per treatment) were randomly allocated to two interventions designed to produce mild or severe NEB (MNEB and SNEB) status. Endometrial samples were examined histologically, and the presence of neutrophils, macrophages, lymphocytes and natural killer cells was confirmed using haematoxylin and eosin and immunostaining. SNEB cows had greater signs of uterine inflammation. Samples of previously gravid uterine horn were used to localise S100A8 and S100A9 by immunohistochemistry. Both S100 proteins were present in bovine endometrium with strong staining in epithelial and stromal cells and in infiltrated leucocytes. Immunostaining was significantly higher in SNEB cows along with increased numbers of segmented neutrophils. These results suggest that the metabolic changes of a post-partum cow suffering from NEB delay uterine involution and promote a chronic state of inflammation. We show that upregulation of S100A8 and S100A9 is clearly a key component of the early endometrial response to uterine infection. Further studies are warranted to link the extent of this response after calving to the likelihood of cows developing endometritis and to their subsequent fertility.

scholarly journals Comparison of yield, composition and quality of milk of Polish Holstein-Friesian cows in conventional and automatic milking systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Magdalena Kolenda ◽  
Dariusz Piwczyński ◽  
Marcin Brzozowski ◽  
Beata Sitkowska ◽  
Piotr Wójcik
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Fat Content ◽  
Urea Content ◽  
Holstein Friesian ◽  
Automatic Milking ◽  
Automatic Milking Systems ◽  
Quality Of Milk ◽  
L1 And L2 ◽  
Friesian Cows

AbstractThe aim of the present study was to evaluate the changes in selected production and functional traits of Polish Holstein-Friesian cows after switching from a conventional (CMS) to an automatic milking system (AMS). The study consisted of 3398 Polish Holstein- Friesian dairy cows, from 16 herds in which CMS was changed to AMS. Cows were in their 1st (L1) or 2nd lactation (L2). The data consisted of milk yield [MY, kg], fat content [FC, %], protein content [PC, %], dry matter [DM, %], lactose content [LC, %], urea content [MU, mg/l], somatic cell count [SCC, thous./ml] and score [SCS, log]. The milking system had a significant impact on milk yield, fat, lactose, dry matter and urea contents. Regardless of lactation number, milk derived from CMS was characterised by higher values for FC, PC, DM SCC and SCS, while milk from AMS had higher MY, LC and MU. Multifactor analysis of variance also confirmed significant effect of herd, season, herd × milking system interaction on SCS in milk of cows in L1. In the studied herds change from CMS to AMS was evaluated separately for cows in L1 and L2. The transitioning from CMS to AMS resulted in the decrease of fat content in 6 L1 and 7 L2 herds, dry matter in 8 L1 and 5 L2 herds. SCS in milk also decreased in 4 L1 and 5 L2 herds. The change caused the increase of MY in 11 L1 and 9 L2 herds, lactose content in 6 L1 and 4 L2 herds and urea content in 9 L1 and 10 L2 herds. AMS may positively affect milk yield and health status, however, the change of milking system should be also accompanied by the change in herd management.

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