1.054
IF5
1.150
IF
Q3
JCR
1.7
CiteScore
0.396
SJR
Q2
SJR
40
MNiSW
148.75
ICV
ORIGINAL PAPER
 
CC-BY 4.0
 
 

Passage of large plastic particles through the digestive tract of lactating and dry cows

M. Šimek 1,  
L. Zeman 2,  
 
1
Research Institute of Animal Nutrition, Ltd. Videňská 699, 691 23 Pohořelice, Czech Republic
2
Mendel University of Agriculture and Forestry Zeměděská 1, 613 00 Brno, Czech Republic
3
Central Institute for Supervising and Testing in Agriculture Jaselská 16, 746 01 Opava, Czech Republic
J. Anim. Feed Sci. 1999;8(2):263–272
Publication date: 1999-03-19
KEYWORDS
ABSTRACT
In five trials carried out on two lactating and two dry cows three sets of particle sizes were used: in the first set particles with a diameter of 9 mm and length of 4, 6, 8 and 10 mm, in the second set particle sizes of 8/8,11/11,14/14 and 17/17 (diameter/length) mm, and the third set 8/8,9/9,10/10,11/ 11 and 12/12 mm particles. In the first set the lactating cows had a significantly higher mean recovery (97.8 vs 75.9 %) and a significantly shorter total tract mean retention time (TMRT) (53.0 vs 96.6 h) than the dry cows (P<0.05). In the second trial with lactating cows the main differences in recovery were found between 11/11 and 14/14 mm particles, significant at 48 h after administration (63.8 vs 31.3 %; P<0.05). Regurgitation of 17/17 mm particles was 27.5 % in lactating cows and 80% in dry cows in the course of 384 h. In the third set did not yield significant results, except 36 h (P<0.05) after placing. It is concluded that relatively good recovery and TMRT can be achieved in lactating cows with plastic particles of a size larger than 11/11 mm but smaller than 14/14 mm.
 
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ISSN:1230-1388