Sheep farming keeps an invaluable place in the brand new Algerian farming and you will cost savings; it keeps part of the updates about herd which can be the brand new best provider out of red meat. This has been projected on 20 billion heads, certainly and this 80% is actually distributed on the north part of Algeria (Kerboua mais aussi al 2003).
Pounds and you will development are essential in the total production, particularly when the new animal meat manufacturing is the main purpose; a leading birth lbs lets the pet in order to well start their industry, and you can develop easily both before and after weaning predisposes, in order to a better infection resistance and also to arrive at easily adolescence and you will maturity (Sulieman ainsi que al 1985).
These features give an explanation for dependence on the fresh new Ouled Djellal reproduce inside Algeria, accounting getting 61% of one’s federal sheep energetic (Dehimi 2005). It’s a completely white sheep, which have a fine end and you can wool, getting together with adolescence during the period of 8 so you’re able to 10 days, the original calving during the fifteen days old while the lamb’s lbs within delivery means step three.fifty Kg (Chellig 1992). The newest weaning years is just about 3 months (Dekhili and you may Mahnane 2004),which have an excellent fatting period of sixty so you can 70 months, and the average every single day obtain off 150 in order to two hundred grams per big date (Chellig 1992).
The brand new lack of blogged study https://datingranking.net/fr/rencontres-daventure/ to your Ouled Djellal gains shows, and the desire delivered to so it reproduce prompted us to make this research, whose main objective were to analysis the fresh lambs’ gains, through the autumn and springtime, if you’re looking at other factors affecting gains differences particularly intercourse, birth sort of and you may age of mom.
Analysis area and you will months
The analysis was held in the region of Chlef; an area located in the Northern-To the west of Algeria and you will covering as much as 4700 kilometer?. They corresponds to a large Neogene basin, bordered into the north of the Dahra hills as well as on the fresh new Southern from the Ouarsenis hills. This area try characterized by several bioclimatic areas; the fresh new partial-arid prevalent about main and you may southern area area, while the sub-humid on the northern region, that have the typical annual rainfall from 300 mm/season and you may an indicate temperatures of 7 C during the winter months and 37 C in the summertime (ANATA 1996). Animals in the near order of Chlef stays mainly based on sheep, and farming reigns over more production of animal meat and you will fleece. Sheep agriculture are sedentary, mainly focused regarding the flatlands in addition to all the way down valleys.
The study occurred inside the period out of 2010 so you can 2014, and you will on it an example away from 113 lambs of your Ouled Djellal’s reproduce in addition to 51 lambs created during autumn and you will 62 lambs born throughout the spring season.
Animal government and feeding
The brand new pet used in this research was was able significantly less than semi-rigorous reproduction program, with an eating system predicated on grazing up until June, and you can cereal stubble in the summertime. Throughout the eating lack several months and you can harsh climatic conditions, the new parents have been stored in barns and you will given with pure hay and you can wheat straw, formulated from the barley and wheat bran concentrate,nutrition. Lambs produced was indeed left through its parents getting dam’s milk,specific fodder combination and you can twice daily fresh-water.
Analysis collection and you can examined products
Once-born, new lambs was basically understood that have ear tags like the go out off delivery, the newest animal’s mother and you can a detection number.
So you’re able to display the development activities, lambs was indeed considered in this ten circumstances shortly after beginning, following a weekly weigh (loads and you can mediocre each and every day increases) try did within ages 0 in order to 90 days (off beginning to help you weaning). Lambs’ weights were taken in brand new early morning to your an empty tummy, playing with a premier reliability balance and you may consuming idea the fresh lambing seasons, the sex, the fresh delivery particular and the period of the mother. It latter factor obtained after the teeth test is actually put into cuatro age range: quicker or equal to three years, 3 to 6 many years, 6 in order to 9 age and most nine ages.