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Article Dans Une Revue Archives of Animal Nutrition Année : 2024

Supplementing zebu cattle with crop co-products helps to reduce enteric emissions in West Africa

Gérard Xavier Gbenou
Luc Hippolyte Dossa
  • Fonction : Auteur

Résumé

In Africa, a wide variety of diets (forage + crop co-products orother agricultural by-products) is being used by livestock farm-ers in different production systems to adapt to climatechange. This study aimed to assess the performance of variouslocal feeding strategies on Sudanese Fulani zebu cattle. Twoexperiments were carried out on 10 steers aged initially 33months (142 kg body weight – BW). The animals were fedeight different diets at an intake level of 3.2% LW in drymatter (DM), including two control diets of 100% rangelandforage (100% RF) and six experimental diets made up of for-age and crop co-products (75:25 DM ratio). In the first experi-ment, 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 experi-ment, 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 experi-ment lasted 3 weeks, including 2 weeks of adaptation to thediet and 1 week of data collection on individual animals(intake, apparent digestibility, and enteric methane). The NDFcontent of the diets was different within each experiment (p <0.05). Among diets containing CC, DM intake [g/kg BW] wassignificantly higher (+31%; p = 0.025) for the diet containingrice straw than for the other diets, which showed similar levelsto the RF diet. Among diets containing LC, intake was signifi-cantly higher (p = 0.004) than for the Pmax diet. Intake washigher for the peanut haulm diet than for the cowpea haulmdiet. The DM digestibility was similar between the different diets in each experiment. Enteric methane (eCH4) yield [g/kgDMI] from the CC and LC-containing diets were reduced by anaverage of 23% and 20% compared to the RF and Pmaxcontrol diets respectively. Raising awareness among agro-pastoralists about the use of crop co-products offers real pro-spects for eCH4 emissions mitigation in the Sahel region.
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Dates et versions

hal-04621397 , version 1 (24-06-2024)

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Gérard Xavier Gbenou, Mohamed Habibou Assouma, Denis Bastianelli, Timbilfou Kiendrebeogo, Laurent Bonnal, et al.. Supplementing zebu cattle with crop co-products helps to reduce enteric emissions in West Africa. Archives of Animal Nutrition, 2024, pp.1-17. ⟨10.1080/1745039X.2024.2356326⟩. ⟨hal-04621397⟩
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