Male broiler chicks (n = 120) were fed diets containing 0, 5, 10 or 15% dried distillers' grains with solubles (DDGS) from the 12th day up to the end of fattening (day 35). During this period feed intake, weight gain and excreta quality (pH, DM) were tested. A digestibility trial was carried out on four birds from each group on the last five days of the experiment to determine the digestibility of organic matter and CP of the different diets. The protein digestibility was evaluated using three different methods; uric acid correction, α-amino-N and amino acid-N. There were no significant effects of increased DDGS levels on feed intake, weight gain, excreta quality or digestibility of CP and organic matter. However, feed conversion showed a tendency to decline at the highest DDGS level (15%). Digestibility of DDGS protein was estimated to be 77%. There was no significant difference between uric acid and α-amino-N method, but both methods had a significantly lower CP digestibility than amino acid-N. The present results indicate that DDGS can be used as a protein source in diets for fattening broilers up to 10–15%.

中文翻译：

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干酒糟可溶物 (DDGS) 作为肉鸡蛋白质来源的评价

从第 12 天到育肥结束（第 35 天），雄性肉鸡（n = 120）饲喂含有 0、5、10 或 15% 干酒糟和可溶物 (DDGS) 的日粮。在此期间，测试了采食量、增重和排泄物质量（pH、DM）。在实验的最后五天对每组的四只鸡进行了消化率试验，以确定不同饮食的有机物质和 CP 的消化率。使用三种不同的方法评估蛋白质消化率；尿酸校正，α-氨基-N和氨基酸-N。DDGS 水平的增加对采食量、体重增加、排泄物质量或粗蛋白和有机物的消化率没有显着影响。然而，在最高 DDGS 水平（15%）时，饲料转化率呈下降趋势。DDGS 蛋白的消化率估计为 77%。尿酸法与α-氨基-N法无显着差异，但两种方法的CP消化率均显着低于氨基酸-N法。目前的结果表明，DDGS 可用作育肥肉鸡日粮中高达 10-15% 的蛋白质来源。