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.
So you’re able to better understand the effect of the latest crossbreeding towards the intimate precocity out of hybrid pet, the latest AFC is assessed predicated on: crossbreed type, competition away from sire parents (bull and you may inseminated regional cattle), hybridization peak and you will stock facilities
The new suggest years in the beginning calving for everybody breeds developed is ± days, symbolizing whenever three years (couple of years 11 months 19 days ± 11 months day). The absolute most precocious heifers calved in this couple of years ( months). To have 50% out of heifers, basic calving is at weeks. The first features were held an average of in the ± days ( so you’re able to months).
Brand new indicate AFC of the crossbreeds is actually less than people reported among Zebu beneath the tropics from the more forty weeks advertised in lots of studies ( Rahman mais aussi al., 2016 ; Tellah et sexe rencontre politique al., 2015a , 2015b ; Bashir and you will Este Zubeir, 2013 ; Sokouri et al., 2010 ; Bayemi mais aussi al., 2005 ). , 2015 ). Particular people have stated overall performance most next to our observance with the various other crossbreeds within the Africa, notwithstanding cow types included in the fresh new experiment: 34 months one of many Montbeliard crossbreeds in the Algeria ( Madani and you will Mouffok, 2008 ) and you may Morocco ( Srairi and you can Mousili, 2014 ), ± 0.43 days from the Girolando crossbreed into the Benin ( Doko ainsi que al., 2012 ). It was a similar towards Holstein-Friesian crossbreed cows during the Ethiopia during the thirty six.4 ± 1.7 weeks, brand new Borgou and you will Lagunaire types in the thirty six.1 ± six.31 days within the Benin ( Adamou-Ndiaye mais aussi al., 2003 ) and in new Azawak Zebu in the thirty six.5 ± 4.ten and you will ± 13 months within the Niger ( Achard and you can Chanono, 2006 , 1997 ).
Our very own observance is greater than those people said because of the Genzebu ainsi que al. (2016) certainly one of crossbreed cattle for the Kenya (twenty six.nine ± 5.cuatro and twenty-seven.0 ± step three.seven weeks). It was a bit much better than the fresh findings of the Ngodigha et al. (2009) off 31.7 ± 2.5 weeks certainly crossbreeds (Holstein x Bunadji) from inside the Nigeria, Ben Salem mais aussi al. (2009) out-of 30.seven ± 4.12 months during the Holstein in the Tunisia and you may Srairi and Mousili (2014) from 30 weeks inside the Montbeliard in Morocco. Particular variation affairs associated with the AFC had been analyzed in order to achieve the comments.
Among the other crossbreeding models identified ( Table 1 ), brand new Fulani Zebu (FZ) inseminated having semen away from Montbeliard (MB x FZ) and you will Alps Brownish (Abdominal x FZ) keeps lead more precocious corssbreeds (earliest calving at the a couple of years) (5%). If you find yourself, the brand new inseminations regarding Fulani Zebu cattle to the semen from Holstein (HT x FZ) and out-of Tarentaise (T x FZ) then insemination regarding Gudali Zebu cattle having semen away from Montbeliard (MB x GZ) has actually produced this new precocious crossbreed cattle.
Minimal was weeks while the restriction was months
Dining table 1: Years to start with calving (months) considering crossbreeding enter in dairy cows facilities in the region away from Bobo-Dioulasso when you look at the Burkina Faso
The research focused on the new reproduction monitoring of twenty (20) crossbreed cattle due to the newest interbreeding through the artificial insemination anywhere between local reproduce cows (Gudali Zebu and you may Fulani Zebu) and amazing breed bulls (Holstein, Alps Brownish, Tarentaise, Montbeliard). Such crossbreeds have been created anywhere between 1999 and 2010 and you may gave the very first calf ranging from 2002 and 2012 into the about three increased stock farms in metropolitan and you can residential district areas of Bobo-Dioulasso. Each of these farms features throughout the fifty hybrid cattle when you look at the development. The initial farm is located in a city, next ten Km aside in the southern log off in addition to 3rd sixty Kilometer out within east hop out out of Bobo-Dioulasso. Preliminary studies ranging from within these areas helped to choose these around three facilities which have a cattle register (temperatures and you will fake insemination monitoring sheets). Events associated with private track of animal reproduction such calving dates, schedules of the basic heating and you can inseminations were submitted each and every day of the the fresh new cattlemen and the inseminators. New exploitation of these data files caused it to be possible to determine twenty (20) very first calving’s equal to the original features. These types of farms try characterized by the current presence of lost, a good herd health monitoring, a guided breeding setting (mostly AI, to have diminished a selected bull), the new concentrate offers (cotton fiber cake otherwise cottonseed and commercial malt) regarding the ration giving and you can intensive shipment away from silage and you will agricultural by the items. The sole reason for it operation type ‘s the design and you may deals away from yourself canned milk products, twice daily (day and you may evening). New centers is served toward animals on the get back away from grazing plus in the latest early morning at milking time.