A THEORETICALLY-BASED MODEL FOR PREDICTING TOTAL DIGESTIBLE NUTRIENT VALUES OF FORAGES AND CONCENTRATES

被引：689

作者：

WEISS, WP ^{[1
]}

CONRAD, HR ^{[1
]}

STPIERRE, NR ^{[1
]}

机构：

[1] PAPILLON AGR PROD, EASTON, MD 21601 USA

来源：

ANIMAL FEED SCIENCE AND TECHNOLOGY | 1992年 / 39卷 / 1-2期

关键词：

D O I：

10.1016/0377-8401(92)90034-4

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

A model using concentrations of neutral detergent fiber (NDF), lignin, crude protein (CP), ash, fatty acids or ether extract, and acid and neutral detergent insoluble crude protein, was developed for predicting total digestible nutrients (TDN) of feeds. The model incorporates theoretical digestion coefficients for CP, lipid, and non-fiber carbohydrate. Digestibility of NDF was estimated using a surface area model based on the lignin encrustation theory. The digestible amount of each nutrient was summed and then a term describing metabolic fecal TDN was subtracted. The model was tested on an independent set of 248 feeds (including forages and concentrates). The mean square error for all feeds was 61 g TDN kg-1 dry matter which is comparable with the error term for in vivo digestion data. The model was equally accurate and precise for forages and concentrate feeds.

引用

页码：95 / 110

页数：16

共 43 条

[1] SOURCES OF ERROR IN PREDICTING DIGESTIBLE DRY-MATTER FROM THE ACID-DETERGENT FIBER CONTENT OF FORAGES [J].