Chemical composition of sugarcane silages with crambe bran

ABSTRACT We evaluated the contents of dry matter (DM), crude protein (CP), mineral matter (MM), soluble carbohydrates (CHOS), ammonia nitrogen (N-NH3), neutral detergent fiber (NDF), and acid detergent fiber (ADF) in sugarcane silages to which different levels of inclusion (LI) of crambe bran (CB) were added in proportions of 0, 3, 10, 17 and 20% at different storage times (ST). Laboratory silos were used, predetermined ST being 0, 3, 7, 12, 24, 36, 41, and 60 days after silage. For statistical analysis, the response surface methodology was used, in which LI and ST served as independent factors and response variables as dependent factors. The levels of DM and CP increased linearly with NI; however, it did not show any significant response regarding ST. The CHOS contents were reduced linearly with NI and displayed a quadratic response with ST. The interaction between NI and ST for the levels of N-NH3 was significant, as the levels reduced with the NI and ST. The levels of NDF and ADF reduced linearly with NI and displayed a quadratic response with ST. The CB showed high efficacy to improve fermentation of ensiled cane, with the addition and conservation of nutrients in all NI evaluated and over the storage time. In addition to the residues generated with the production of biodiesel in a sustainable way, CB is a viable alternative to the sugarcane silage.

摘要：本研究针对添加不同添加水平（LI）亚麻荠麸皮（CB，添加比例分别为0%、3%、10%、17%及20%）的甘蔗青贮料，在不同储存时间（ST）条件下的多项营养指标进行检测，检测指标包括干物质（DM）、粗蛋白（CP）、矿物质（MM）、可溶性碳水化合物（CHOS）、氨态氮（N-NH3）、中性洗涤纤维（NDF）与酸性洗涤纤维（ADF）。实验采用实验室青贮罐开展制备，预设储存时间为青贮制作后的0、3、7、12、24、36、41及60天。统计分析采用响应面法，以添加水平与储存时间作为自变量，各营养成分含量作为因变量。结果表明：干物质与粗蛋白含量随添加水平呈线性升高趋势，但随储存时间未呈现显著变化；可溶性碳水化合物含量随添加水平呈线性降低趋势，而随储存时间呈现二次响应特征；氨态氮水平与添加水平、储存时间的交互作用显著，其含量随二者升高均呈降低趋势；中性洗涤纤维与酸性洗涤纤维含量随添加水平呈线性降低趋势，随储存时间则呈现二次响应特征。本研究证实，亚麻荠麸皮可有效改善甘蔗青贮的发酵品质，在所有测试添加水平及储存周期内均可有效保留青贮料中的营养物质。除作为可持续生产生物柴油过程中产生的副产物外，亚麻荠麸皮是一种可行的甘蔗青贮饲料添加替代原料。