粗灰分是饲料、动物组织和动物排泄物样品在550-600℃高温炉中将所有有机物质全部氧化后剩余的残渣。主要为矿物质氧化物或盐类等无机物质，有时还含有少量泥沙，故称粗灰分。
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食道瘘管样较人工采摘样含粗蛋白、粗灰分高，含粗纤维低。
The esophageal fistula samples are higher in crude protein, crude ash and lower in crude fiber than that of hand plucked samples.
粗纤维和粗灰分的含量在春季最低，但在其它季节有明显地增加。
The content of crude fibre and crude ash content was minimum in spring, but in other season have increase obviously.
结果表明：引进种与当地品种的粗蛋白含量、粗纤维含量、粗灰分含量存在显著差异。
The results showed that there were distinct differences of crude protein, crude fiber and ash content between introduced and local cultivars.
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