饲粮非淀粉多糖特性及猪饲粮非淀粉多糖酶谱优化方法研究进展
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摘要
提高饲料养分的利用率是缓解我国粮食安全矛盾,建立安全、优质、环保的养殖产业的基础,并具有重大的经济和社会效益。自1864年Henneberg与Stohmann首倡概略成分分析方法以来,饲料养分的测试方法已沿用一个半世纪,基本保持原体系未变。而针对饲料非淀粉多糖成分的复杂性和多样性,其分析方法和分析层次不断地演进。饲料非淀粉多糖黏性、溶解性和持水力等理化特性限制了本身以及饲粮中其他养分被动物的消化、吸收和利用。非淀粉多糖酶具有降低肠道食糜黏度、消减非淀粉多糖的"笼蔽效应"、多糖分解形成的寡糖益生作用等功能备受关注。而非淀粉多糖酶的作用受到饲粮结构、畜禽品种、生理阶段、环境条件等种种复杂因素的影响,因此,寻求快速、准确筛选非淀粉多糖酶种类和剂量的方法至关重要。本文从非淀粉多糖的定义、测定方法和理化性质入手,总结饲粮非淀粉多糖在猪消化道内的消解及其对猪饲料养分消化率的影响,分析非淀粉多糖酶对猪饲料养分利用率和生产性能的影响,侧重综述非淀粉多糖酶谱筛选体外优化方法的研究进展以及存在的问题,并就作者等开发以简捷、标准、可重复为前提的体外非淀粉多糖酶谱优化方法设计原理、应用及可行性进行阶段性总结汇报。
引文
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