Digestibility and performance of lambs fed diets containing old man saltbush hay

作者：Bezerra Moreno Greicy Mitzi; Borba Hirasilva; Leal de Araujo Gherman Garcia; Voltolini Tadeu Vinhas; de Moraes Salete Alves; da Silva Sobrinho Americo Garcia; Neto Oscar Boaventura; de Lima Junior Dorgival Morais; Alves Cirne Luis Gabriel; Buzanskas Marcos Eli

来源：Semina-Ciencias Agrarias, 2017, 38(1): 455-466.

DOI：10.5433/1679-0359.2017v38n1p455

• Alternative feedstuff
• Feedlot
• Intake
• Weight gain

The aim of this study was to evaluate feed intake, digestibility, nitrogen balance, water balance, and performance of lambs fed diets containing old man saltbush hay associated with a concentrate. Thirtytwo castrated feedlot Santa Ins lambs at approximately eight months of age, with 22 +/- 1.97 kg body weight, were distributed into a completely randomized experimental design. Acid detergent fiber intake increased ( P < 0.05), whereas non-fibrous carbohydrates intake decreased ( P < 0.01). Inclusion of old man saltbush in the diet reduced ( P < 0.01) the digestibility of dry and organic matter, neutral and acid detergent fiber, and non-fibrous carbohydrates. The intakes of digestible dry and organic matter, ether extract, total carbohydrates, and digestible non-fibrous carbohydrates also decreased ( P < 0.01). Inclusion of old man saltbush did not influence water consumption from the trough by the sheep, averaging 4327.20 mL/day(-1). Body weight at slaughter and daily weight gain decreased linearly ( P < 0.05) and feed conversion worsened as old man saltbush hay was added to the diet. Inclusion of old man saltbush at up to 40% replacing the concentrate in feedlot lamb diets does not compromise the performance of these animals.

• 出版日期2017
• 单位Univ Estadual Paulista