Krogdahl A, Dalsgard B
Poult Sci. 1981 Nov;60(11):2480-5. doi: 10.3382/ps.0602480.
The investigation concerned the digestibility of nitrogen and the content of uric acid, ammonia, and urea in urine and feces in White Leghorn layers. Eight colostomized hens were given a commercial cage-layer diet. Feces and urine were collected under acid conditions. Acidified urine contained more ammonia than untreated urine. For quantitative determination of ammonia, Urine collection ought to be done under acid conditions. Of urinary nitrogen uric acid represented 88%, ammonia 7%, urea 3%, and 2% unidentified. Urinary ammonia constituted 90% of ammonia in total excreta and urinary urea 86% of the urea in excreta. By means of these distribution factors and content of nitrogen compounds in total excreta, good estimates of the nitrogen digestibility were obtained. Our method appears to be applicable to chickens of other ages, sex, breeds, and environmental conditions.
该研究关注白来航母鸡氮的消化率以及尿液和粪便中尿酸、氨和尿素的含量。八只做了结肠造口术的母鸡被喂食商业笼养蛋鸡饲料。在酸性条件下收集粪便和尿液。酸化尿液中的氨含量比未处理尿液中的多。为了定量测定氨，尿液收集应在酸性条件下进行。尿液中的氮，尿酸占88%，氨占7%，尿素占3%，2%未明确。尿氨占总排泄物中氨的90%，尿尿素占排泄物中尿素的86%。通过这些分布因子和总排泄物中氮化合物的含量，可以很好地估算氮的消化率。我们的方法似乎适用于其他年龄、性别、品种和环境条件的鸡。
