Peanut Cake as an Alternative Protein Source to Soybean Meal on Performance, Nitrogen Utilization, and Carcass Traits in Feedlot Lambs
2024
Maria Leonor Garcia Melo Lopes de Araújo | Gleidson Giordano Pinto de Carvalho | André Gustavo Leão | Douglas dos Santos Pina | Ronaldo Lopes Oliveira | Laís Santana Bezerra Dias | Jéssica Dias Caribé | Rodolpho Almeida Rebouças | Luciana de Jesus Rodrigues | Rosani Valéria Marcelina Matoso Silva | Camila de Oliveira Nascimento | Victor Guimarães Oliveira Lima | Taiala Cristina de Jesus Pereira | Mara Lúcia Albuquerque Pereira | Henry Daniel Ruiz Alba
Substituting soybean meal (SM) with other protein sources can be advantageous in reducing production costs without increasing nitrogen losses in the environment. Peanut cake (PC) might be a strategy in ruminant herds to result in a performance similar to that observed in animals fed SM. This study assessed the PC inclusion at rates of 0, 250, 500, 750, and 1000 g/kg on intake and digestibility, performance, nitrogen balance, microbial protein synthesis, and carcass traits of lambs. Forty-five entire, crossbreed Dorper ×: Santa Inê:s lambs (average age = five months and 24.49 ±: 5.27 kg of BW) were distributed in a completely randomized design. Only the ether extract intake was not affected by the PC inclusion, and only the crude protein digestibility was affected by the diets. The total weight and average daily gains decreased, and the feed conversion increased. Hot carcass yield was influenced quadratically, the leg depth increased and the loin-eye area decreased. The total replacement of soybean meal with peanut cake in diets for lambs did not compromise nutrient digestibility, microbial protein synthesis, and carcass characteristics. Nevertheless, peanut cake as a protein source in the diet had adverse effects on nutrient intake and growth performance of feedlot lambs.
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