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 fresh new mean many years in the beginning calving for all types built try ± days, symbolizing around 3 years (couple of years eleven months 19 months ± eleven days 24 hours). Minimal is days as well as the limitation are days. The most precocious heifers calved inside two years ( months). Getting fifty% of heifers, basic calving was at months. The original properties took place normally from the ± days ( to months).
Brand new imply AFC of your crossbreeds was below people advertised among the many Zebu within the tropics from the over forty days reported in many studies ( Rahman ainsi que al., 2016 ; Tellah ainsi que al., 2015a , 2015b ; Bashir and you can Este Zubeir, 2013 ; Sokouri ainsi que al., 2010 ; Bayemi mais aussi al., 2005 ). , 2015 ). Some people features advertised efficiency extremely next to the observance on different crossbreeds within the Africa, despite cow types found in the test: 34 weeks among the Montbeliard crossbreeds inside the Algeria ( Madani and Mouffok, 2008 ) and you can Morocco ( Srairi and you may Mousili, 2014 ), ± 0.43 months about Girolando hybrid from inside the Benin ( Doko mais aussi al., 2012 ). It absolutely was a comparable on Holstein-Friesian hybrid cattle inside Ethiopia on thirty-six.4 ± step 1.7 weeks, the latest Borgou and you can Lagunaire types from the 36.step one ± six.29 weeks when you look at the Benin ( Adamou-Ndiaye mais aussi al., 2003 ) and in the new Azawak Zebu during the 36.5 ± 4.10 and ± thirteen days in Niger ( Achard and Chanono, 2006 , 1997 ).
Our very own observation is higher than those individuals claimed by Genzebu et al. (2016) one of hybrid cattle in the Kenya (twenty-six.nine ± 5.4 and you will 27.0 ± step three.eight months). It had been somewhat better than new findings because of the Ngodigha mais aussi al. (2009) from 31.eight ± dos.5 months among crossbreeds (Holstein x Bunadji) into the Nigeria, Ben Salem et al. (2009) of 30.seven ± cuatro.12 months into the Holstein in the Tunisia and Srairi and you will Mousili (2014) of 31 days in the Montbeliard in the Morocco.
Among the some other crossbreeding versions recognized ( Table step one ), the newest Fulani Zebu (FZ) inseminated having sperm regarding Montbeliard (MB x FZ) and you can Alps Brownish (Ab x FZ) provides delivered the essential precocious corssbreeds (first calving during the 2 years) (5%). While you are, the new inseminations from Fulani Zebu cows for the sperm off Holstein (HT x FZ) and you will regarding Tarentaise (T 
x FZ) then insemination from Gudali Zebu cattle which have semen from Montbeliard (MB x GZ) possess delivered the new precocious hybrid cows.
Particular type situations in the AFC was analyzed so you can attain the comments
Desk step one: Decades initially calving (months) centered on crossbreeding type in milk cows farms in the area from Bobo-Dioulasso in Burkina Faso
To finest understand the effect of brand new crossbreeding into intimate precocity from crossbreed pets, new AFC was examined centered on: hybrid sort of, race out-of sire parents (bull and inseminated regional cows), hybridization peak and you can inventory facilities
The research worried about the brand new reproduction monitoring of twenty (20) crossbreed cows due to the brand new interbreeding through the phony insemination ranging from regional breed cows (Gudali Zebu and you can Fulani Zebu) and you will unique reproduce bulls (Holstein, Alps Brown, Tarentaise, Montbeliard). Such crossbreeds had been born between 1999 and 2010 and you can gave its very first calf ranging from 2002 and you can 2012 on about three increased inventory facilities in the urban and residential district aspects of Bobo-Dioulasso. Each one of these facilities has actually throughout the fifty crossbreed cattle for the creation. The first ranch is located in a city, the following 10 Kilometres out at south leave in addition to 3rd 60 Kilometer out at east log off off Bobo-Dioulasso. Initial surveys between on these areas assisted to choose such three facilities with a livestock check in (temperature and fake insemination overseeing sheet sets). Incidents regarding private tabs on creature reproduction for example calving schedules, times of one’s earliest heats and you may inseminations have been filed each and every day of the this new cattlemen and inseminators. The fresh exploitation of them records made it you can easily to choose twenty (20) basic calving’s add up to the original functions. Such farms is actually characterized by the existence of shed, a good herd fitness overseeing, a led reproduction form (mainly AI, for insufficient a selected bull), this new focus offers (thread cake or cottonseed and you can industrial malt) in the ration feeding and you can extreme delivery regarding silage and you may agricultural by the products. The only real aim of it operation form of is the manufacturing and you can product sales regarding yourself processed milk, twice daily (day and you can night). The focuses are offered into pets to their get back away from grazing and also in new early morning within milking day.
