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 suggest age initially calving for all types assembled is ± days, symbolizing just as much as three-years (2 years 11 months 19 months ± 11 days 1 day). The minimum is weeks additionally the limitation try months. One particular precocious heifers calved within a couple of years ( months). To own fifty% off heifers, very first calving is at months. The initial properties occurred typically on ± days ( to help you months).
This new indicate AFC of your own crossbreeds is below people claimed one of several Zebu under the tropics on over forty months advertised in lot of education ( Rahman mais aussi al., 2016 ; Tellah mais aussi al., 2015a , 2015b ; Bashir and El Zubeir, 2013 ; Sokouri et al., 2010 ; Bayemi et al., 2005 ). , 2015 ). Some article writers has claimed performance extremely next to our very own observance into various other crossbreeds when you look at the Africa, in spite of cow breeds found in the fresh try: 34 days among the Montbeliard crossbreeds within the Algeria ( Madani and you will Mouffok, 2008 ) and you may Morocco ( Srairi and you can Mousili, 2014 ), ± 0.43 months on the Girolando crossbreed inside Benin ( Doko ainsi que al., 2012 ). It was the same toward Holstein-Friesian crossbreed cows inside Ethiopia at the thirty six.cuatro ± 1.eight weeks, the newest Borgou and you can Lagunaire breeds during the 36.1 ± six.30 months within the Benin ( Adamou-Ndiaye ainsi que al., 2003 ) and in the fresh new Azawak Zebu on thirty six.5 ± cuatro.10 and you may ± 13 weeks inside Niger ( Achard and you will Chanono, 2006 , 1997 ).
Our very own observation was higher than people advertised because of the Genzebu mais aussi al. (2016) certainly one of crossbreed cows in the Kenya (twenty-six.9 ± 5.4 and you may 27.0 ± step three.7 weeks). It had been a bit a lot better than this new observations because of the Ngodigha et al. (2009) out-of 29.7 ± 2.5 months certainly crossbreeds (Holstein x Bunadji) into the Nigeria, Ben Salem et al. (2009) off 29.seven ± 4.one year into the Holstein from inside the Tunisia and Srairi and you may Mousili (2014) out of 29 weeks from inside the Montbeliard for the Morocco.
Among additional crossbreeding sizes understood ( Table step 1 ), this new Fulani Zebu (FZ) inseminated with sperm off Montbeliard (MB x FZ) and you will Alps Brownish (Ab x FZ) has put by far the most precocious corssbreeds (very first calving at the two years) (5%). If you’re, the new inseminations out of Fulani Zebu cows into the semen of Holstein (HT x FZ) and you will from Tarentaise (T x FZ) then the insemination off Gudali Zebu cattle that have sperm away from Montbeliard (MB x GZ) enjoys introduced brand new precocious crossbreed cattle.
Specific variation things of AFC was reviewed to achieve the comments
Dining table step one: Decades initially calving (months) based on crossbreeding input dairy cattle facilities in the region from Bobo-Dioulasso in Burkina Faso
So you’re able to finest see the aftereffect of brand new crossbreeding on the intimate precocity out of hybrid animals, the fresh AFC are analyzed considering: hybrid kind of, battle out of sire mothers (bull and you will inseminated regional cattle), hybridization peak and stock farms
The study concerned about the reproduction tabs on twenty (20) crossbreed cattle through new interbreeding from the artificial insemination ranging from regional breed cows (Gudali Zebu and you can Fulani Zebu) and you will exotic breed bulls (Holstein, Alps Brown, Tarentaise, Montbeliard). These crossbreeds have been created between 1999 and you can 2010 and offered the very first calf anywhere between 2002 and you can 2012 with the around three enhanced stock farms inside the metropolitan and you will residential district areas of Bobo-Dioulasso. Every one of these facilities provides from the 50 crossbreed cows in the creation. The original ranch is situated in a city, the second 10 Km out at southern get off while the third 60 Km away during the eastern exit out-of Bobo-Dioulasso. Preliminary studies ranging from during these components helped to select these about three farms that have a cattle register (temperature and fake insemination keeping track of sheet sets). Situations connected with individual track of animal reproduction particularly calving times, dates of one’s first heats and you will inseminations had been submitted daily because of the the latest cattlemen and also the inseminators. The latest exploitation of those data files managed to make it it is possible to to decide twenty (20) very first calving’s comparable to the original qualities. These types of facilities is characterized by the existence of shed, good herd wellness keeping track of, a led breeding form (generally AI, for not enough a selected bull), brand new focus supplies (cotton fiber cake otherwise cottonseed and you will industrial malt) from the ration eating and you can intensive shipments off silage and you may agricultural from the activities. The sole aim of that it process variety of ‘s the development and you may product sales regarding yourself processed milk products, 
twice daily (early morning and you can evening). The newest concentrates is actually served toward pets on their return from grazing and also in brand new early morning from the milking date.
