The amino acid composition of rumen-undegradable protein: A comparison between forages

被引：24

作者：

Edmunds, B. ^{[1
]}

Suedekum, K. -H. ^{[1
]}

Bennett, R. ^{[2
]}

Schroder, A. ^{[3
]}

Spiekers, H. ^{[4
]}

Schwarz, F. J. ^{[5
]}

机构：

[1] Univ Bonn, Inst Anim Sci, D-53115 Bonn, Germany

[2] Adisseo Europe Africa Middle East, F-92160 Antony, France

[3] Kemin AgriFoods Europe, B-2200 Herentals, Belgium

[4] Bavarian State Res Ctr Agr LfL, Inst Anim Nutr & Feed Management, D-85586 Poing, Germany

[5] Tech Univ Munich, D-85350 Freising Weihenstephan, Germany

来源：

JOURNAL OF DAIRY SCIENCE | 2013年 / 96卷 / 07期

关键词：

ryegrass; white clover; alfalfa; lysine; IN-SITU; DAIRY-COWS; MICROBIAL-CONTAMINATION; MILK-PRODUCTION; NITROGEN; DEGRADABILITY; DEGRADATION; FRACTIONS; DIGESTION; PROFILE;

D O I：

10.3168/jds.2012-6536

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The objective of this study was to improve knowledge regarding the amino acid profile of the insoluble portion of ingested forage escaping rumen degradation. Six forage categories were analyzed. Categories varied in botanical composition and each contained 2 samples. Samples within categories were derived from the same parent material but differed in harvest, maturity, or conservation type. The rumen-undegradable protein of all forages was measured by incubation for 16 h in the rumen of 3 nonlactating cows. All residues were corrected for microbial colonization. The AA profile of the residue was different to the original profile. Degradation trends of individual AA, in terms of increase or decrease relative to the original concentration, were similar between all forages. The AA profiles of forage residues, both within and between categories, were more similar to each other than to their respective original profile. This information may aid in improving the accuracy of estimating postruminal AA supply from forages while decreasing the number of samples required to be analyzed.

引用

页码：4568 / 4579

页数：12

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