Data extracted from the analysis of herd records were entered in Excel. The descriptive statistical analysis of the age at first calving (calculation of frequencies, means, standard deviations, minimum and maximum) was made with the XLSTAT software (6.1.9 release). These parameters were analyzed by ANOVA and the results were compared using the Newman-Keuls test. Differences were considered significant for p < 0.05.

Brand new imply many years to start with calving for everybody types come up with is actually ± days, representing just as much as three years (two years 11 months 19 months ± eleven days twenty four hours). Minimal was days additionally the limit are days. The most precocious heifers calved within this 24 months ( months). To have 50% away from heifers, first calving is at months. The initial properties occurred an average of in the ± months ( to help you weeks).

Brand new suggest AFC of crossbreeds is less than the individuals claimed among the many Zebu in tropics from the over 40 weeks reported in several studies ( Rahman mais aussi al., 2016 ; Tellah ainsi que al., 2015a , 2015b ; Bashir and you will El Zubeir, 2013 ; Sokouri ainsi que al., 2010 ; Bayemi mais aussi al., 2005 ). , 2015 ). Certain article authors has reported performance extremely near to our very own observation Dating by age dating site towards additional crossbreeds for the Africa, notwithstanding cow types included in new experiment: 34 days one of many Montbeliard crossbreeds inside Algeria ( Madani and you will Mouffok, 2008 ) and Morocco ( Srairi and Mousili, 2014 ), ± 0.43 days regarding the Girolando hybrid in Benin ( Doko ainsi que al., 2012 ). It had been an identical for the Holstein-Friesian crossbreed cows in Ethiopia from the 36.4 ± step one.7 months, brand new Borgou and Lagunaire breeds at 36.step one ± 6.31 weeks from inside the Benin ( Adamou-Ndiaye mais aussi al., 2003 ) plus brand new Azawak Zebu during the thirty six.5 ± cuatro.10 and you can ± thirteen months in the Niger ( Achard and you can Chanono, 2006 , 1997 ).

All of our observance is actually more than those people claimed because of the Genzebu ainsi que al. (2016) among crossbreed cows inside the Kenya (twenty six.nine ± 5.4 and you will twenty seven.0 ± 3.seven days). It absolutely was slightly a lot better than new findings of the Ngodigha mais aussi al. (2009) from 30.eight ± dos.5 days certainly one of crossbreeds (Holstein x Bunadji) when you look at the Nigeria, Ben Salem et al. (2009) off 30.seven ± cuatro.1 year during the Holstein inside the Tunisia and you can Srairi and you will Mousili (2014) out-of 31 weeks for the Montbeliard during the Morocco.

One of many other crossbreeding designs recognized ( Table step one ), the newest Fulani Zebu (FZ) inseminated with semen of Montbeliard (MB x FZ) and you will Alps Brown (Ab x FZ) keeps put the absolute most precocious corssbreeds (earliest calving on a couple of years) (5%). While you are, the new inseminations out of Fulani Zebu cattle into the sperm away from Holstein (HT x FZ) and you will away from Tarentaise (T x FZ) then your insemination regarding Gudali Zebu cows with semen regarding Montbeliard (MB x GZ) have produced the fresh new precocious hybrid cows.

Particular type circumstances on the AFC was in fact analyzed to attain the statements

Table step one: Decades to start with calving (months) predicated on crossbreeding enter in dairy cattle farms in the area from Bobo-Dioulasso into the Burkina Faso

So you can most readily useful understand the effectation of the fresh crossbreeding into intimate precocity away from hybrid dogs, the latest AFC is reviewed predicated on: crossbreed form of, race out of sire parents (bull and inseminated regional cattle), hybridization height and stock farms

The analysis focused on the fresh new reproduction tabs on twenty (20) hybrid cows due to the newest interbreeding from phony insemination ranging from regional breed cattle (Gudali Zebu and Fulani Zebu) and you can amazing breed bulls (Holstein, Alps Brownish, Tarentaise, Montbeliard). These crossbreeds was indeed created anywhere between 1999 and you will 2010 and you can provided their earliest calf between 2002 and you may 2012 on the around three improved inventory facilities when you look at the metropolitan and suburban aspects of Bobo-Dioulasso. Each of these facilities possess regarding fifty crossbreed cattle in the creation. The first ranch is situated in an urban area, the next 10 Km away during the south exit together with third sixty Km out during the east hop out out-of Bobo-Dioulasso. Preliminary studies ranging from throughout these elements helped to pick this type of around three facilities which have a cattle sign in (temperatures and you may fake insemination monitoring sheets). Incidents related to individual track of animal reproduction eg calving schedules, dates of your own very first heats and inseminations have been submitted every day by the the brand new cattlemen additionally the inseminators. The newest exploitation of them records caused it to be you’ll be able to to choose twenty (20) earliest calving’s corresponding to the original attributes. These farms was characterized by the current presence of forgotten, an excellent herd wellness monitoring, a led reproduction form (generally AI, getting not enough a selected bull), the fresh focus offers (pure cotton pie or cottonseed and you will industrial malt) on the ration eating and you can extreme shipping out-of silage and you will agricultural by things. Truly the only intent behind so it operation kind of ‘s the manufacturing and you may purchases of yourself processed milk, two times a day (morning and evening). The latest centers are offered towards the pet on the get back of grazing as well as in brand new morning from the milking day.