Chemical composition and fermentative losses of mixed sugarcane and pigeon pea silage

ABSTRACT. Adding legumes to sugarcane silage is a strategy used to improve silage quality and reduce losses. This study’s objective was to evaluate the chemical composition and fermentation profile of silages sugarcane and pigeon pea. A completely randomized design was used, with five treatments and four replications. The treatments consisted of sugarcane silage with increasing pigeon pea proportions (0, 25, 50, 75 and 100%). The forages were ensiled in experimental microsilos that remained closed for 60 days. Their chemical compositions were evaluated by determining the pH value and dry matter, crude protein, neutral detergent fiber, acid detergent fiber, hemicellulose, cellulose and lignin content. Fermentation profiles were evaluated by determining the effluent, gas, and total dry matter losses and dry matter recovery of the silage. Including pigeon pea in sugarcane silage decreases the hemicellulose content and increases the crude protein, acid detergent fiber and lignin content. Fermentation losses are reduced by adding pigeon pea to sugarcane silage with reduced effluent and gas losses and increased dry matter.

摘要：在甘蔗青贮饲料中添加豆科作物是提升青贮品质、减少损耗的常用策略。本研究旨在评估甘蔗与木豆混合青贮饲料的化学成分及发酵特性。实验采用完全随机设计，设置5个处理组与4次重复，处理组为不同木豆添加比例的甘蔗青贮饲料，比例分别为0%、25%、50%、75%及100%。供试饲草被装填至实验用微型青贮罐中，密闭发酵60天。通过测定pH值（pH value）、干物质（dry matter）、粗蛋白（crude protein）、中性洗涤纤维（neutral detergent fiber）、酸性洗涤纤维（acid detergent fiber）、半纤维素（hemicellulose）、纤维素（cellulose）及木质素（lignin）含量，评估青贮饲料的化学成分；通过测定青贮饲料的渗出液损失、气体损失、总干物质损失及干物质回收率，评估其发酵特性。在甘蔗青贮饲料中添加木豆可降低半纤维素含量，同时提升粗蛋白、酸性洗涤纤维与木质素含量；添加木豆可通过减少渗出液与气体损失、提升干物质留存率，降低甘蔗青贮饲料的发酵损耗。