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.
New mean age to start with calving for everybody types developed was ± weeks, representing everything three years (2 years 11 months 19 days ± 11 months 24 hours). Minimal is actually weeks and also the restriction is actually months. The most precocious heifers calved within this 2 years ( months). To have fifty% away from heifers, first calving was at days. The first services occurred an average of in the ± months ( to help you months).
The new indicate AFC of one’s crossbreeds try lower than people stated one of the Zebu under the tropics during the more than forty days reported in lots of knowledge ( Rahman et al., 2016 ; Tellah ainsi que al., 2015a , 2015b ; Bashir and you will El Zubeir, 2013 ; Sokouri et al., 2010 ; Bayemi et al., 2005 ). , 2015 ). Particular writers possess advertised abilities extremely next to all of our observance into the different crossbreeds during the Africa, in spite of cow types used in the brand new try: 34 months one of several Montbeliard crossbreeds from inside the Algeria ( Madani and Mouffok, 2008 ) and Morocco ( Srairi and you may Mousili, 2014 ), ± 0.43 days in the Girolando crossbreed in the Benin ( Doko et al., 2012 ). It absolutely was an identical towards the Holstein-Friesian crossbreed cows into the Ethiopia during the thirty six.4 ± step one.seven weeks, the new Borgou and you may Lagunaire types at the 36.step 1 ± six.29 months when you look at the Benin ( Adamou-Ndiaye et al., 2003 ) and also in the fresh new Azawak Zebu in the thirty-six.5 ± 4.ten and ± thirteen days during the Niger ( Achard and Chanono, 2006 , 1997 ).
Our very own observance try greater than men and women said because of the Genzebu ainsi que al. (2016) certainly one of hybrid cattle inside Kenya (twenty-six.9 ± 5.cuatro and you may twenty-seven.0 ± 3.eight months). It actually was some better than the brand new observations because of the Ngodigha mais aussi al. (2009) regarding 31.eight ± 2.5 weeks among crossbreeds (Holstein x Bunadji) in the Nigeria, Ben www.datingranking.net/bdsm-sites/ Salem ainsi que al. (2009) out-of 29.eight ± cuatro.12 months inside Holstein during the Tunisia and you may Srairi and you may Mousili (2014) from 30 months when you look at the Montbeliard during the Morocco.
Among other crossbreeding items known ( Dining table step 1 ), the new Fulani Zebu (FZ) inseminated which have sperm out-of Montbeliard (MB x FZ) and you may Alps Brown (Ab x FZ) provides delivered more precocious corssbreeds (very first calving within 24 months) (5%). If you find yourself, the fresh inseminations out-of Fulani Zebu cows towards sperm out of Holstein (HT x FZ) and you will from Tarentaise (T x FZ) then your insemination out-of Gudali Zebu cows having semen away from Montbeliard (MB x GZ) keeps put the new precocious hybrid cattle.
Some variation facts of AFC was in fact reviewed so you’re able to reach the statements
Table step 1: Age initially calving (months) considering crossbreeding enter in milk cattle facilities in the area out-of Bobo-Dioulasso from inside the Burkina Faso
So you’re able to most useful comprehend the effect of the crossbreeding on sexual precocity out of hybrid animals, the fresh AFC try analyzed predicated on: hybrid particular, competition away from sire mothers (bull and you will inseminated regional cows), hybridization height and you can stock facilities
The study worried about the fresh reproduction monitoring of twenty (20) crossbreed cows as a consequence of the new interbreeding from artificial insemination anywhere between regional reproduce cattle (Gudali Zebu and Fulani Zebu) and unique reproduce bulls (Holstein, Alps Brownish, Tarentaise, Montbeliard). These crossbreeds was basically born anywhere between 1999 and you will 2010 and you will gave their earliest calf ranging from 2002 and 2012 with the about three improved inventory facilities into the urban and you may residential district regions of Bobo-Dioulasso. Each of these facilities features in the fifty hybrid cows into the design. The original farm is located in an urban area, another 10 Km away during the southern log off plus the 3rd 60 Km away on eastern get off of Bobo-Dioulasso. Initial surveys ranging from within these areas helped to select this type of about three facilities that have a cattle register (temperatures and you may fake insemination monitoring sheet sets). Situations about private tabs on animal reproduction eg calving dates, schedules of your own very first heats and you may inseminations was filed daily because of the the cattlemen while the inseminators. New exploitation of those data managed to make it it is possible to to decide twenty (20) earliest calving’s comparable to the initial characteristics. This type of farms are described as the clear presence of forgotten, a great herd fitness overseeing, a guided breeding setting (generally AI, to have insufficient a selected bull), brand new focus supplies (cotton fiber cake or cottonseed and industrial malt) regarding ration giving and you will intense shipping of silage and you can agricultural from the facts. The only purpose of so it operation method of ‘s the manufacturing and you may deals away from manually canned milk products, twice a day (early morning and you can night). The fresh new centers try supported into animals on their go back out-of grazing plus in the brand new early morning on milking date.