After decomposing the sample by dry method, dissolve the residue with sulfuric acid and ammoniumsulfate, and test it.
试样以干法分解，以硫酸，硫酸铵溶解残渣后进行测试。
2
Through single factor test initially set up a suitable for duck solid fermentation medium optimization formula: plus accessories for the bran, and adding 1.5% ammoniumsulfate.