scholarly journals Factors Affecting Productive and Reproductive Performance of Dairy Cows in El Salvador

1985 ◽  
Vol 68 (11) ◽  
pp. 3104-3109 ◽  
Author(s):  
C.W. Reaves ◽  
C.J. Wilcox ◽  
J.M. Salazar ◽  
R.W. Adkinson
Keyword(s):  
El Salvador ◽  
Dairy Cows ◽  
Reproductive Performance ◽  
Factors Affecting

Productive and reproductive performance of crossbred and indigenous dairy cows at smallholdings in selected towns of Jimma Zone, Ethiopia

2021 ◽  
Vol 61 (1) ◽  
pp. 92
Author(s):  
Belay Duguma
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Management Practices ◽  
Production Systems ◽  
Management Strategies ◽  
Factors Affecting ◽  
Jimma Zone ◽  
Improvement Programs

Context Evaluation of the performance of dairy cows kept in different production systems is essential for the development of appropriate breeding strategies. Aims To examine milk production and reproductive performance of crossbred (CB) and indigenous (I) dairy cows, farmers’ traits preference for CB and I breeding females, and factors affecting the performance of dairy cattle on smallholdings in selected towns of Jimma Zone, Ethiopia. Methods In total, 52 smallholder dairy cattle farmers were randomly sampled and data were collected through individual face-to-face interviews by using structured questionnaires. The traits studied were daily milk yield (DMY), lactation milk yield (LMY), lactation length (LL), age at first service (AFS), age at first calving (AFC), calving interval (CI), days open (DO), and number of service per conception (NSC), all being factors affecting performance of dairy cattle and farmers’ preferred dairy traits. Results On average, CB cows had significantly (P < 0.05) higher DMY (6.0 ± 0.33 vs 1.8 ± 0.07 L/cow), LMY (1466.7 ± 1.13 vs 376.0 ± 21.02 L (L)), LL (8.1 ± 0.41 vs 6.9 ± 0.22 months), and lower AFS (2.69 ± 0.1 vs 3.3 ± 0.07 years), AFC (3.7 ± 0.13 vs 4.3 ± 0.07 years) and CI (21.2 ± 1.37 vs 29.8 ± 1.30 months) than did I cows. However, DO and NSC were not significantly (P > 0.05) affected by genotype. In order of perceived importance, high milk yield (mean rank = 0.306), LL (0.292) and fertility (0.199) were farmers’ most preferred traits for CB breeding cows, and the corresponding preferred traits for I cows were high milk yield (0.253), adaptability (0.229) and LL (0.192). The most important factors perceived by farmers affecting the performance of dairy cattle were breed, nutrition, diseases, breeding and management practices Conclusions The findings of the study indicated that even though CB cows performed better, the performance of both breeds of dairy cows in the study area was found to be generally low due to delayed AFS, late AFC, long CI, shorter LL, low daily and LMY and high NSC. Implications The study highlighted that there is a potential for increasing the performance of dairy cows in the study area, through improved management strategies leading to shorter AFS, AFC, CI and lower NSC. Furthermore, future breed-improvement programs should take into consideration farmers’ trait preferences in design of sustainable improvement programs.

77 REPRODUCTIVE PERFORMANCE OF DAIRY COWS DIFFERING IN THE INTERVAL FROM CALVING TO THE FIRST OVULATION IN THE POSTPARTUM PERIOD

2012 ◽  
Vol 24 (1) ◽  
pp. 151
Author(s):  
M. Yamaguchi ◽  
S. Takahashi ◽  
H. Koyama ◽  
O. Dochi
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Postpartum Period ◽  
Body Condition Score ◽  
Early Recovery ◽  
Factors Affecting ◽  
Condition Score ◽  
Peripartum Period ◽  
Days Open

In recent years, reproductive performance of dairy cows has declined worldwide. The reproductive characteristics of dairy cows should be evaluated to improve their fertility. Dochi et al. (2010) had reported that dairy cows that exhibited early first ovulation gave a low milk yield, had an early recovery of body condition score (BCS) in the postpartum period and a shorter number of days open. The objective of this study was to evaluate the effect of BCS on the functional recovery of reproduction after the birth of the calves. In this study, lactating Holstein cows were placed in free-stall housing equipped with an automatic milking system. The data presented in this study were collected from 48 cows that had calved between December 2007 and October 2010 with an average parity of 3.4 (range 2–6). The reproductive performance and the BCS during the different intervals between calving and the first ovulation were analysed using ANOVA. The conception rate at the first service was 38.1%. The average milk yield (305 days) was 12 299 kg. The first ovulation and oestrus were determined by ultrasonography. The results of the different intervals to the first ovulation are presented in Table 1. The average interval from the start of days in milk (DIM) to the first ovulation, first oestrus and first service; the number of days open; the number of services per conception and the milk yield (kg day–1, by 90 DIM) were 37.4, 54.7 and 110.3 days; 168.2 days open; 2.5 times; and 42.1 kg day–1, respectively. The cows that exhibited early first ovulation (≤21 DIM) in the postpartum period had significantly shorter intervals between the start of DIM and the first oestrus (P < 0.01). However, the days to first service, the number of days open, the number of services per conception and the milk yield (kg day–1, by 90 DIM) did not differ significantly. The BCS in the peripartum period of different intervals to the first ovulation decreased from 3.1 to 2.4 by 150 DIM. This study showed that average BCS of preparturient 50–10 DIM is 3.0. Moreover, the average BCS of parturition is declining to 2.5 (parturition from 70 to 150 DIM). The cows became pregnant after an increase in the BCS (>150 DIM). In conclusion, these results suggest that the delay to the first ovulation in the postpartum period tended to have delayed the oestrus expression in the cows. Moreover, the low level of BCS in the peripartum period, regardless of the number of days of the first ovulation and the first oestrus, potentially influenced the prolongation in the number of days open. To improve the fertility of the cows, it is important to elucidate the factors affecting the fluctuations in the BCS during the peripartum period. Table 1.Reproductive performance of dairy cows differing in interval to postpartum first ovulation

scholarly journals Factors Affecting Reproductive Performance of Dairy Cows

1985 ◽  
Vol 68 (7) ◽  
pp. 1793-1803 ◽  
Author(s):  
D.A. Coleman ◽  
W.V. Thayne ◽  
R.A. Dailey
Keyword(s):  
Dairy Cows ◽  
Reproductive Performance ◽  
Factors Affecting

Factors Affecting the Thyroid Uptake of I131 in Dairy Cows

1957 ◽  
Vol 16 (2) ◽  
pp. 318-327 ◽  
Author(s):  
E. W. Swanson ◽  
F. W. Lengemann ◽  
R. A. Monroe
Keyword(s):  
Dairy Cows ◽  
Factors Affecting ◽  
Thyroid Uptake

scholarly journals Effects of Intrauterine Infusion of a Chitosan Solution on Recovery and Subsequent Reproductive Performance of Early Postpartum Dairy Cows with Endometritis: A Pilot Field Trial

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 197
Author(s):  
Hiroaki Okawa ◽  
Missaka M.P. Wijayagunawardane ◽  
Peter L.A.M. Vos ◽  
Osamu Yamato ◽  
Masayasu Taniguchi ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Reproductive Performance ◽  
Polymorphonuclear Leukocytes ◽  
Prostaglandin F2α ◽  
Chitosan Solution ◽  
Control Group ◽  
Control Groups ◽  
Early Postpartum Period ◽  
Early Postpartum ◽  
And Control

This study investigated the efficacy of intrauterine infusion of a chitosan solution (CHT) on uterine recovery in early postpartum dairy cows with or without endometritis, and their subsequent reproductive performance. In Experiment 1, cows with endometritis at 3 weeks postpartum were administered CHT (n = 5) and prostaglandin F2α (PGF2α) (n = 4). Untreated cows (n = 7) served as the control group. In Experiment 2, 18 cows with a normally recovered uterus at the fresh cow check (mean, 35 days postpartum) were assigned to the CHT (n = 10) and control (n = 8) groups, and intrauterine infusion was conducted in the CHT group. Overall, in Experiment 1, the percentage of polymorphonuclear leukocytes significantly declined in the CHT group (32.3 ± 10.2 to 5.5 ± 2.4, p < 0.05) from week 3 to week 5, but no decline occurred in the PGF2α and control groups. In Experiment 2, the CHT and control groups showed no significant differences in reproductive parameters, suggesting the absence of adverse effects of CHT on fertility. These results suggest that intrauterine infusion of CHT in the early postpartum period effectively accelerates uterine recovery from endometritis and might be a suitable replacement for PGF2α administration.

scholarly journals Effects of dietary supplementation of pioglitazone on metabolism, milk yield, and reproductive performance in transition dairy cows

2016 ◽  
Vol 85 (9) ◽  
pp. 1540-1548 ◽  
Author(s):  
Ali Reza Yousefi ◽  
Hamid Kohram ◽  
Ahmad Zare Shahneh ◽  
Mohammad Javad Zamiri ◽  
Ali Akbar Fouladi-Nashta
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Dietary Supplementation ◽  
Transition Dairy Cows
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