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 mean many years at first calving for everyone breeds built are ± days, representing approximately 3 years (2 years 11 days 19 weeks ± 11 months a day). Minimal are days and also the restriction is actually days. By far the most precocious heifers calved within this 24 months ( months). Getting fifty% of heifers, very first calving was at weeks. The initial properties occurred normally during the ± weeks ( so you’re able to days).
The fresh suggest AFC of the crossbreeds are below those reported one of the Zebu under the tropics within over forty days reported in a lot of degree ( Rahman mais aussi al., 2016 ; Tellah et al., 2015a , 2015b ; Bashir and you may Este Zubeir, 2013 ; Sokouri ainsi que al., 2010 ; Bayemi ainsi que al., 2005 ). , 2015 ). Certain writers possess advertised results really alongside our observation into different crossbreeds within the Africa, notwithstanding cow breeds included in brand new test: 34 days among the many Montbeliard crossbreeds from inside the Algeria ( Madani and you will Mouffok, 2008 ) and you may Morocco ( Srairi and you will Mousili, 2014 ), ± 0.43 days on the Girolando hybrid within the Benin ( Doko ainsi que al., 2012 ). It actually was a similar towards Holstein-Friesian crossbreed cattle inside Ethiopia during the thirty-six.cuatro ± step 1.eight months, the Borgou and Lagunaire types from the 36.1 ± 6.29 weeks in Benin ( Adamou-Ndiaye et al., 2003 ) and also in the fresh Azawak Zebu at the 36.5 ± cuatro.10 and ± thirteen weeks inside the Niger ( Achard and you may Chanono, 2006 , 1997 ).
The observance is higher than those stated by Genzebu et al. (2016) certainly crossbreed cows inside the Kenya (twenty six.9 ± 5.4 and twenty-seven.0 ± step 3.7 months). It absolutely was a bit better than new findings by Ngodigha mais aussi al. (2009) from 31.seven ± 2.5 months one of crossbreeds (Holstein x Bunadji) inside the Nigeria, Ben Salem ainsi que al. (2009) out-of 30.eight ± cuatro.12 free Religious online dating months from inside the Holstein in Tunisia and Srairi and you can Mousili (2014) of 30 weeks during the Montbeliard inside Morocco.
Among the many more crossbreeding types identified ( Dining table 1 ), the brand new Fulani Zebu (FZ) inseminated with sperm from Montbeliard (MB x FZ) and you may Alps Brown (Abdominal x FZ) enjoys produced by far the most precocious corssbreeds (earliest calving on 24 months) (5%). When you find yourself, the new inseminations off Fulani Zebu cows on semen regarding Holstein (HT x FZ) and you can away from Tarentaise (T x FZ) then the insemination from Gudali Zebu cows with sperm regarding Montbeliard (MB x GZ) has actually introduced the fresh new precocious crossbreed cattle.
Particular variation items on the AFC was basically assessed to help you achieve the statements
Table 1: Age at first calving (months) according to crossbreeding input dairy cows facilities in the region regarding Bobo-Dioulasso from inside the Burkina Faso
In order to most useful see the effect of the crossbreeding to the intimate precocity off crossbreed dogs, the AFC are examined according to: hybrid particular, battle of sire parents (bull and you will inseminated local cows), hybridization level and you will stock farms
The study concerned about the latest reproduction monitoring of twenty (20) hybrid cows resulting from this new interbreeding from phony insemination between local reproduce cattle (Gudali Zebu and you may Fulani Zebu) and you will amazing reproduce bulls (Holstein, Alps Brownish, Tarentaise, Montbeliard). These types of crossbreeds was indeed produced between 1999 and you can 2010 and you will offered their very first calf ranging from 2002 and 2012 on the three increased inventory farms within the metropolitan and you can residential district aspects of Bobo-Dioulasso. Each one of these facilities features from the fifty crossbreed cows during the creation. The initial ranch is found in a city, another ten Kilometer away during the southern area log off therefore the 3rd sixty Kilometres out at east get off of Bobo-Dioulasso. First surveys ranging from in these section helped to pick these about three facilities with a cattle register (temperature and you can artificial insemination keeping track of sheet sets). Events regarding private monitoring of creature breeding such calving dates, dates of your own very first warms and you may inseminations have been filed each and every day by the newest cattlemen and also the inseminators. The fresh new exploitation of them documents managed to make it you are able to to choose twenty (20) earliest calving’s equal to the initial attributes. Such facilities is described as the presence of forgotten, an effective herd fitness monitoring, a led reproduction means (primarily AI, having shortage of a specified bull), the fresh focus offers (cotton cake otherwise cottonseed and industrial malt) from the ration eating and you will extreme distribution from silage and you may farming by points. The only aim of it operation style of ‘s the design and you can product sales away from manually processed whole milk, two times a day (early morning and you will evening). The latest focuses is actually supported towards pet on the go back off grazing plus in the fresh early morning at the milking day.