svd饲料概略养分分析简介 ·······························································································2 饲料中水分的测定 ·······························································································4 综合技能考试 ·······························································································8
饲料中粗蛋白的测定 ·······························································································9
综合技能考试 ·······························································································15
饲料CF含量的测定 ·······························································································16
综合技能考试 ·······························································································20
饲料中EE数控切割机系统含量的测定 ·······························································································21
综合技能考试 ·······························································································25
饲料中粗灰分（矿物质的测定） ···········································································27
综合技能考试 ·······························································································30
饲料中无氮浸出物含量的计算 ·················································································31
饲料中矿物元素的分析 ·················································································32
饲料中Ca含量的测定 ·····························································································33
综合技能考试 ·····························································································37
饲料中P含量的测定 ·····························································································38
综合技能考试 ·····························································································42
饲料概略养分分析简介
一.饲料概略养分分析方法的来源和主要内容
一百多年来，人们一直沿用德国Weende试验站的汉尼伯格（Hunneberg）和司徒门（Stohman）两位科学家在1860年所创立的方法来分析饲料，这种方法称为Weende饲料
分析体系，也就是饲料常规成分分析体系，亦称饲料近似成分分析或饲料概略养分分析（Feed Proxinate Analysis）
此法可测定饲料中六种概率养分，即水分、粗蛋白、粗脂肪、粗纤维、粗灰分、无氮浸出物的含量。测定饲料水分含量系用105ºC烘箱烘干称重法；测定饲料中CP含量系用凯氏定氮法测定饲料的含氮量，再乘以6.25系数记得；测定饲料中EE含量系采用索氏脂肪抽提器，应用乙醚提取称重法；测定饲料中Ash含量系用550ºC高温炉灼烧烧杯称重法；测定饲料中CF含量系在特定温度与时间下，用规定浓度的稀酸、稀碱先后处理、洗净、烘干、烧灰称重法；饲料中NFE含量并非直接测定而是推算而得。由饲料样品重（100%）减去水分含量%、CP%、EE%、CF%、Ash%的总和即可得出饲料中的NFE%
二.饲料概略养分分析法评价
概略养分分析是建立总消化养分体系的基础，并为现行饲料成分和营养价值表及饲料数据库提供数据，但此法仍有一下不足：
洛克王国!圣龙骑士
1.分析的六大营养成分并非纯粹的化合物，而是各种成分的混合物。例如H桑普采暖炉20为H20与挥发
性物质的混合物；Ash为矿物质元素与沙泥土的混合物；CP为Pr、AA与非蛋白质含氮化合物的混合物等。NFE更是一个复杂混合物，主要包括淀粉、糖类、木质素等。
2.测定饲料Pr系采用间接法：先测饲料含氮量，再乘以换算系数6.25而得，此系数是根据跟中饲料Pr平均含氮量为16%而计算出来的，实际上饲料的含氮量的变异范围是14.7～19.5%。因此，系数的变异范围为5.12～建筑施工安全管理论文6.73
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