蛍光X線分析法による粗飼料中のマクロミネラルの測定

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The authors tested the development of non-destructive method, that is flourescent X-ray analysis (TXA), in mineral analysis of forages in place of destructive method based on the acid digestion- atomic absorption or colorimetric system (wet method). The forages included grass hays (first and second cut), alfalfa hay, corn silages and grass silages. The air dried samples (5-10% moisture contents) were ground to pass through a 1.0mm sieve with cross beater mill (West-Germany Retsch). In FXA method, forage sample have to originally to shape into a thin layer briquette. The authors developed plastic sheet method for that purpose. 0.5g sample was weighed and transferred uniformly to plastic sheet with sticky tape, and then pressed by the weight of 20 tonne per one briquette. An about 400-500μm thickness briquette was obtained by this procedure within 15 minutes, The differences of the analytical value between FXA method and wet method were not significant statically (P>0.01 or 0.05) in following minerals; calcium, magnesium, phosphorous, potassium, sodium and sulphur. Cofficients of variation of six repetition were within 3% in all minerals by FXA method. In FXA method, the time required for analysis of calcium, magnesium, phosphorous, potassium and sodium was within 25 minutes after sample preparation.
公益社団法人日本畜産学会の論文