The accuracy of intake estimation based on the use of alkane controlled-release capsules and faeces grab sampling in cows

被引：54

作者：

Berry, NR ^{[1
]}

Scheeder, MRL ^{[1
]}

Sutter, F ^{[1
]}

Kröber, TF ^{[1
]}

Kreuzer, M ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, ETH Ctr, LFW, Inst Anim Sci, CH-8092 Zurich, Switzerland

来源：

ANNALES DE ZOOTECHNIE | 2000年 / 49卷 / 01期

关键词：

alkane; controlled-release capsule; feed intake; forage; cow;

D O I：

10.1051/animres:2000104

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Alkanes are digesta markers for use as a research tool giving the opportunity to estimate feed intake and digestibility in vivo. The development of intra-ruminal controlled-release capsules (CRC) offers a practical method of dosing even-chain alkanes and may give less diurnal variability of marker excretion improving the validity of grab-faecal sampling. This was tested in the present study by total faeces collection in four cows for 7 days. Dry matter intake was 10.4 kg forages and 10.4 kg concentrate (diet 1) and 15.1 kg forage (diet 2). The recovery (proportion of dosed or dietary alkane intake found in faeces) of C(31) was lower than that of C(32) and consequently underestimated intake. C(33) and C(32) had similar recoveries giving accurate intake estimates from pooled samples from total daily faecal collections and also from grab samples taken at 6.30 a.m. The study confirms that a single injection for gas chromatography is sufficient. Alkane CRC are concluded to be an accurate method for estimating forage intake of cows consuming diets with or without concentrate when spot sampling of faeces is conducted over 7 days and only moderately less precise when sampling over 5 days.

引用

页码：3 / 13

页数：11

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