Free Access
Issue
Reprod. Nutr. Dev.
Volume 42, Number 4, July-August 2002
Page(s) 295 - 305
DOI https://doi.org/10.1051/rnd:2002026
Reprod. Nutr. Dev. 42 (2002) 295-305
DOI: 10.1051/rnd:2002026

Influence of the load of nylon capsules on their passage through the digestive tract and specific gravity

Jirí Trináctýa, Petr Homolkab, Michal Richtera, Martin Sustalaa and Ales Vymetalb

a  Research Institute of Animal Nutrition, Ltd., 691 23 Pohorlelice, Czech Republic
b  Research Institute of Animal Production, Uhríneves, 104 00 Praha, Czech Republic

(Received 10 September 2001; accepted 28 May 2002)

Abstract
The passage and specific gravity of nylon capsules were evaluated in five trials. In individual trials, different lactating cows were fed the same diet consisting of maize silage, alfalfa hay and concentrate. In each trial the different feeds (or no feed) were used to fill the capsules. The capsules were made of nylon cloth (42 $\mu$m pore size, 10 mm external diameter). The different weights of the load (L1-L5) were obtained using a combination of 2 and 3 mm stainless steel balls. The highest recovery of the capsules was obtained with the L3 and L4 loads (91.4 and 92.3%, resp.). After 14 hours of incubation in the rumen, the calculated values of functional specific gravity of the capsules ranged from 0.92 to 2.05 g $\cdot$cm -3. It was concluded that L3 (one 2 mm and one 3 mm ball) was the suitable weight of the load.


Key words: passage / nylon capsule / different weight / dairy cow

Correspondence and reprints: Jirí Trináctý
    e-mail: trinacty@vuvz.cz

© INRA, EDP Sciences 2002

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.