摘要
用三种不同量的甲醛溶液(甲醛溶液与酪蛋白的重量比为0.15、0.55和0.95)在两种温度(35℃和55℃)条件下,处理酪蛋白,测定其干物质和粗蛋白在瘤胃中的有效降解率。结果表明:甲醛溶液和加热处理均可显著地降低瘤胃有效降解率。通过羊回肠末端内容物分析法和鸡真代谢能法测定瘤胃非降解蛋白(UDP)氨基酸的消化率表明:随着甲醛溶液量的增加和温度升高,氨基酸的消化率也不断降低。同时通过酶测定法、羊回肠末端内容物分析法测定UDP的粗朊消化率表明:随着甲醛溶液量的增加和温度升高,粗朊消化率也不断下降。上述试验说明用甲醛溶液和加热处理,骼蛋白可降低蛋白质在瘤胃的降解,从而提供较多的蛋白质给小肠消化吸收。同时说明甲醛溶液量不宜大,温度不宜高。
Degrability of dry matter and crude protein of casein in the rumen was assayedafter three levels of formaldehyde treatments (formaldehyde:casein; 0.15:1;0.55:1 and 0.95:1) at two temperatures (35℃ and 55℃). The results showedthat both formaldehyde and temperature treatments significantly reduced the degrad-ability. Digestibility of the amino acids and crude protein in undegraded protein inrumens decreased with increating amout of formaldehyde and elevated tempratures asdetermined by analyzing the content at the end of sheep ileum and by forced feedingon chicken. We concluded that both formaldehyde and temperature treatments caneffectively reduce casein degradation in tureens and, as a result, provide more proteinsfor the intestine.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1990年第2期199-203,共5页
Journal of Huazhong Agricultural University
关键词
反刍动物
甲醛溶液
酪蛋白
温度
formaldehyde
casein
temperature
degradation
digestibility
ruminant
