Intake and digestibility of lamb fed diets containing banana crop residues

Abstract: The objective of this work was to evaluate the effects of the inclusion of banana leaf or pseudostem hay in complete diets on the intake, nutrient digestibility, and ruminal short-chain fatty acid production by lambs. A total of 30 Santa Inês x Dorper lambs were allocated to five treatments: 400 g kg-1 Cynodon spp. hay; 200 g kg-1 banana leaf hay + 200 g kg-1 Cynodon spp. hay; 400 g kg-1 banana leaf hay; and 200 g kg-1 banana pseudostem hay + 200 g kg-1 Cynodon spp. hay and 400 g kg-1 banana pseudostem hay. The inclusion of banana crop residues had no effect on dry matter intake, organic matter, crude protein, neutral detergent fiber (NDF), acid detergent fiber, non-fiber carbohydrates, and total carbohydrates, which presented averages of 1,086.8, 1,000.1, 182.7, 374.3, 194.7, 390.2, and 771.6 g per day, respectively. There was a reduction in NDF digestibility with the inclusion of 400 g kg-1 leaf hay, but no differences were observed in the other treatments. The addition of both banana leaf and pseudostem hay can replace Cynodon spp. hay without affecting intake, nutrient digestibility, and ruminal concentration of short-chain fatty acids.

摘要：本试验旨在评估全价日粮中添加香蕉叶或假茎干草对羔羊采食量、养分消化率及瘤胃短链脂肪酸生成的影响。共计30只圣伊内斯（Santa Inês）×杜泊（Dorper）杂交羔羊被随机分为5个处理组：400 g·kg⁻¹狗牙根属（Cynodon spp.）干草组；200 g·kg⁻¹香蕉叶干草+200 g·kg⁻¹狗牙根属干草组；400 g·kg⁻¹香蕉叶干草组；200 g·kg⁻¹香蕉假茎干草+200 g·kg⁻¹狗牙根属干草组；以及400 g·kg⁻¹香蕉假茎干草组。研究结果显示，添加香蕉作物副产物对羔羊的干物质采食量、有机物、粗蛋白质、中性洗涤纤维（NDF）、酸性洗涤纤维、非纤维碳水化合物及总碳水化合物均无显著影响，上述指标的日均均值分别为1086.8 g、1000.1 g、182.7 g、374.3 g、194.7 g、390.2 g及771.6 g。添加400 g·kg⁻¹香蕉叶干草会降低中性洗涤纤维的消化率，但其余处理组未观测到显著差异。综上，香蕉叶干草与假茎干草均可替代狗牙根属干草，且不会影响羔羊采食量、养分消化率及瘤胃短链脂肪酸浓度。