Supplementing zebu cattle with crop co-products helps to reduce enteric emissions in West Africa
Gbenou G.X., Assouma M.H., Bastianelli D., Kiendrebeogo T., Bonnal L., Zampaligre N., Bois B., Sanogo S., Sib O., Martin C., Dossa L.H.. 2024. Archives of Animal Nutrition : 18 p..
In Africa, a wide variety of diets (forage¿+¿crop co-products or other agricultural by-products) is being used by livestock farmers in different production systems to adapt to climate change. This study aimed to assess the performance of various local feeding strategies on Sudanese Fulani zebu cattle. Two experiments were carried out on 10 steers aged initially 33¿months (142¿kg body weight – BW). The animals were fed eight different diets at an intake level of 3.2% LW in dry matter (DM), including two control diets of 100% rangeland forage (100% RF) and six experimental diets made up of forage and crop co-products (75:25 DM ratio). In the first experiment, the control diet was made up of rangeland forage (RF) and supplements consisted of four cereal co-products (CC), i.e. maize, sorghum, millet, and rice straws. In the second experiment, the control diet consisted of Panicum maximum (Pmax) hay, and the supplements tested were two legume co-products (LC), i.e. cowpea and peanut haulms. Each experiment lasted 3 weeks, including 2 weeks of adaptation to the diet and 1 week of data collection on individual animals (intake, apparent digestibility, and enteric methane). The NDF content of the diets was different within each experiment (p¿<¿0.05). Among diets containing CC, DM intake [g/kg BW] was significantly higher (+31%; p¿=¿0.025) for the diet containing rice straw than for the other diets, which showed similar levels to the RF diet. Among diets containing LC, intake was significantly higher (p¿=¿0.004) than for the Pmax diet. Intake was higher for the peanut haulm diet than for the cowpea haulm diet. The DM digestibility was similar between the different diets in each experiment. Enteric methane (eCH4) yield [g/kg DMI] from the CC and LC-containing diets were reduced by an average of 23% and 20% compared to the RF and Pmax control diets respectively. Raising awareness among agro-pastoralists about the use of crop co-products offers real prospects for eCH4 emissions
Mots-clés : régime alimentaire; adaptation aux changements climatiques; zébu; composition chimique; spectroscopie infrarouge; panicum maximum; alimentation des animaux; méthane entérique; changement climatique; prise alimentaire (animaux); valeur nutritive; comportement alimentaire; réduction des émissions; gaz à effet de serre; burkina faso
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Agents Cirad, auteurs de cette publication :
- Assouma Mohamed Habibou — Es / UMR SELMET
- Bastianelli Denis — Es / UMR SELMET
- Bonnal Laurent — Es / UMR SELMET
- Gbenou Gérard Xavier — Es / UMR SELMET
- Sib Ollo — Es / UMR SELMET