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.
The newest mean years initially calving for everybody breeds assembled try ± months, representing whenever three years (24 months eleven weeks 19 months ± 11 months a day). The minimum is months and the limit are days. The most precocious heifers calved in this couple of years ( months). To own fifty% from heifers, earliest calving is at weeks. The initial functions were held on average within ± weeks ( so you’re able to weeks).
New imply AFC of your crossbreeds is less than men and women claimed one of many Zebu in tropics in the over 40 months claimed in many degree ( Rahman mais aussi al., 2016 ; Tellah et al., 2015a , 2015b ; Bashir and you will El Zubeir, 2013 ; Sokouri ainsi que al., 2010 ; Bayemi ainsi que al., 2005 ). , 2015 ). Specific article writers keeps reported show very next to the observance towards the other crossbreeds during the Africa, despite cow breeds found in this new experiment: 34 weeks one of several Montbeliard crossbreeds in the Algeria ( Madani and you will Mouffok, 2008 ) and Morocco ( Srairi and you will Mousili, 2014 ), ± 0.43 days regarding Girolando hybrid within the Benin ( Doko et al., 2012 ). It absolutely was the same toward Holstein-Friesian hybrid cows from inside the Ethiopia on thirty-six.cuatro ± 1.seven days, this new Borgou and you will Lagunaire types in the thirty six.step 1 ± six.29 weeks when you look at the Benin ( Adamou-Ndiaye ainsi que al., 2003 ) and in the fresh new Azawak Zebu within thirty-six.5 ± 4.ten and you can ± 13 months in the Niger ( Achard and Chanono, 2006 , 1997 ).
Our very own observation is higher than those people stated from the Genzebu et al. (2016) certainly one of crossbreed cows in Kenya (26.nine ± 5.cuatro and you will 27.0 ± step 3.7 months). It was somewhat a lot better than new findings by Ngodigha et al. (2009) out of 30.seven ± dos.5 months certainly crossbreeds (Holstein x Bunadji) into the Nigeria, Ben Salem mais aussi al. (2009) of 30.seven ± cuatro.1 year within the Holstein in the Tunisia and you may Srairi and Mousili (2014) regarding 31 weeks in Montbeliard during the Morocco.
Among some other crossbreeding models understood ( Desk 1 ), the brand new Fulani Zebu (FZ) inseminated that have sperm away from Montbeliard (MB x FZ) and you will Alps Brownish (Ab x FZ) has actually brought more precocious corssbreeds (earliest calving on 24 months) (5%). When you’re, brand new inseminations from Fulani Zebu cows to the sperm away from Holstein (HT x FZ) and you can out-of Tarentaise (T x FZ) then the insemination out-of Gudali Zebu cattle which have semen off Montbeliard (MB x GZ) provides lead the fresh precocious crossbreed cows.
Some adaptation items regarding the AFC was in fact assessed so you’re able to reach the statements
Desk step one: Years to start with calving (months) centered on crossbreeding type in whole milk cattle farms in your neighborhood away from Bobo-Dioulasso inside the Burkina Faso
In order to better understand the aftereffect of the latest crossbreeding towards Age Gap Sites online dating the intimate precocity regarding crossbreed dogs, the new AFC is reviewed centered on: crossbreed sorts of, competition off sire parents (bull and you may inseminated regional cattle), hybridization peak and you may inventory facilities
The analysis worried about the new breeding track of twenty (20) hybrid cows as a consequence of the brand new interbreeding from the fake insemination anywhere between regional reproduce cows (Gudali Zebu and you can Fulani Zebu) and you will exotic breed bulls (Holstein, Alps Brownish, Tarentaise, Montbeliard). These crossbreeds was indeed created ranging from 1999 and you can 2010 and you will provided the earliest calf ranging from 2002 and 2012 into around three enhanced stock facilities in urban and residential district aspects of Bobo-Dioulasso. Each one of these facilities possess on fifty crossbreed cows for the production. The initial ranch is located in an urban area, another 10 Kilometres away from the southern log off therefore the 3rd 60 Kilometer out at east get-off of Bobo-Dioulasso. First surveys anywhere between throughout these section assisted to choose these types of about three facilities having a livestock sign in (temperature and you will fake insemination overseeing sheets). Incidents associated with private tabs on animal breeding such as calving dates, times of one’s very first heats and inseminations were submitted daily by the the newest cattlemen and also the inseminators. The fresh exploitation of these files caused it to be possible to decide twenty (20) basic calving’s comparable to the first characteristics. This type of facilities is described as the current presence of forgotten, good herd wellness keeping track of, a guided reproduction form (primarily AI, to have lack of a selected bull), brand new concentrate provides (thread cake or cottonseed and you can commercial malt) in the ration eating and you can intensive shipments away from silage and farming by the products. Really the only intent behind that it procedure type of is the development and you may sales regarding manually processed milk, two times a day (early morning and you may night). The brand new centers are offered with the animals to their come back away from grazing and in the early morning during the milking go out.
