Staty of reproductive performance status in the nomadic sheep flocks of markazi province | ||
| علوم و فنون دامپروری | ||
| Article 3, Volume 4, Issue 14, June 2015, Pages 29-38 PDF (1.13 M) | ||
| DOI: 10.22092/aasrj.2015.103038 | ||
| Authors | ||
| R. A. Azizi* ; A. Mir shamsollahi; A. Sadeghi panah | ||
| Abstract | ||
| This study aimed to investigate reproductive traits in sheep flocks were conducted nomadic Markazi Province. This research field using standard questionnaires in 61 herds were performed using stratified random distribution. In this study,nutritional information and management factors affecting reproduction, such as: the use of flushing nutrition before mating, supplementary feeding in the last two months of pregnancy, the duration of the ram in the flock, time of mating, vaccination, available food resources (pastureland, farm residues and hand feeding), hormone therapy, milk replacer, the migration type, flock size, type of settlement, education and training, sheep breed, herd composition, number of animal at the time of mating, the female animal lambing, litter size, type of birth, number of weaned lambs, and lamb losses referto herders and the questionnaires were completed. Parameters, like the ratio of male to female animals during mating, lambing percentage, prolificacy percentage, fecundity percentage and the percentage of herd productivity was determined using equations. Collected data after formatting and editing were analyzed by SPSS software under windowse. The results showed that the main occupation was farming 96.7% of respondents. More than 57 percent of them were illiterate. Average size of grazing the pastoralists provided for each of the herders were around 2557 ± 214 ha. Average herd size was 366 ± 32, head. More than 97 percent of pastoralist settlements were permanent. More than 82 percent of sheep flocks were native sheep Main style of herders migration were on foot. Flock composition was 68% ewes, 26% young female sheep, 4% young male sheep and 3% of the rams. Respectively. Over 85 % of the lambing was in winter. Mor than 69 percent of the pastoralists weaned their lambs at the age of 4 months.62% of herders- were separated lambs rt the age of 6 to 7 months old from the flock. Maximum lamb mortality was before weaning (41%). The maximum age for keeping sheep in the herd was 5.3 ± 0.1. In more than 85% of flocks milking was not done. Most herders did not do flushing feeding (60.7%). More than half of the pastoralists in the last two months of pregnancy did supplementary feeding (54.1%). Vaccination was performed in all flocks. Duration of rangeland using, crops residues and hand feeding were 6, 3 and 3 months. respectively. The milk replacer and hormone therapy were not use in any of the flocks. Born lamb crop and weaned lamb crop per ewe were 2.9 and 19.7 kg respectively. The mean and standard deviation of reproductive traits, ewe to ram ratio, lambing rate, prolificacy rates, fecundity rate, number of weaned lambs ,lamb production rate and lamb mortality rate were 8.9 ± 1.2, 80.5 ± 2.1, 104.7 ± 0.9, 84 ± 2.1, 174 ± 20.6, 68 ± 2.6 and 19.3 ± 2.1 Respectively. | ||
| Keywords | ||
| Reproductive traits; The nomadic sheep; Markazi Province | ||
|
Statistics Article View: 1,219 PDF Download: 811 |
||
Journal management system. designed by sinaweb