Goedeken F K, Klopfenstein T J, Stock R A, Britton R A, Sindt M H
Dept. of Anim. Sci., University of Nebraska, Lincoln 68583-0908.
J Anim Sci. 1990 Sep;68(9):2936-44. doi: 10.2527/1990.6892936x.
In situ digestion and growth studies were conducted to determine the effects of adding blood to feather meal. In the in situ and digestion studies, soybean meal (SBM), blood meal (BM), feather meal (Fth) and two combinations of 55% raw blood and 45% feathers (RB + F) were used. Feathers and blood were combined either before or after steam hydrolysis of feathers. Ruminal escape protein of Fth was greater than that of SBM but less than that of BM (P less than .10) determined in situ after 12 h of incubation. Ruminal in situ protein digestion was lower (P less than .10) than for the other treatments (P less than .10) when blood was hydrolyzed with feathers. Total tract digestibility was similar (P greater than .10) for SBM, BM and the mixture of RB + F when the blood was not hydrolyzed. In the growth study, calves were supplemented with urea, SBM, BM, Fth or a combination of BM and Fth (BM + Fth; each supplied an equal portion of supplemental protein). The slope ratio technique was used to evaluate the protein sources. The most efficiently used protein sources were BM and BM + Fth compared to SBM and Fth (P less than .05). There was a numerical but not significant (P greater than .1) complementary effect of adding BM to Fth. Soybean meal and Fth had similar protein efficiencies (P greater than .20). Estimated amino acid flow to the small intestine based on in situ amino acid degradation suggested that the complementary effect observed for BM + Fth was due to BM supplying lysine and Fth providing sulfur amino acids.(ABSTRACT TRUNCATED AT 250 WORDS)
进行了原位消化和生长研究，以确定向羽毛粉中添加血液的效果。在原位和消化研究中，使用了豆粕（SBM）、血粉（BM）、羽毛粉（Fth）以及两种由55%的生血和45%的羽毛组成的混合物（RB + F）。羽毛和血液在羽毛蒸汽水解之前或之后进行混合。在孵育12小时后原位测定，Fth的瘤胃逃逸蛋白大于SBM但小于BM（P < 0.10）。当血液与羽毛一起水解时，瘤胃原位蛋白消化率低于其他处理（P < 0.10）。当血液未水解时，SBM、BM和RB + F混合物的全肠道消化率相似（P > 0.10）。在生长研究中，给犊牛补充尿素、SBM、BM、Fth或BM和Fth的组合（BM + Fth；每种提供等量的补充蛋白质）。采用斜率比技术评估蛋白质来源。与SBM和Fth相比，最有效地利用的蛋白质来源是BM和BM + Fth（P < 0.05）。向Fth中添加BM有数值上但不显著（P > 0.1）的互补效应。豆粕和Fth具有相似的蛋白质效率（P > 0.20）。基于原位氨基酸降解估计的小肠氨基酸流量表明，BM + Fth观察到的互补效应是由于BM提供赖氨酸而Fth提供含硫氨基酸。（摘要截短于250字）
