It is indicated that 4mol/L HC1 insoluble ash can replace Cr2O3 when determining the ileum apparent digestibility of dry matter, crude protein and amino acids.

• 说明在测定干物质,粗蛋白质和氨基酸的回肠末端表现消化率时可以使用4mol/L盐酸不溶灰分代替Cr_2O_3。