TY  - JOUR
T1  - Effects of NDF Content on Protozoal Community and Grazing Rate in Rumen
AU - Wang, M.Z. AU - Wang, H.R. AU - Yu, L.H. 
JO  - Journal of Animal and Veterinary Advances
VL  - 8
IS  - 9
SP  - 1746
EP  - 1752
PY  - 2009
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2009.1746.1752
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2009.1746.1752
KW  - NDF content
KW  -rumen
KW  -protozoa
KW  -grazing rate
KW  -community
AB  - The experiment was conducted to investigate the effects of NDF levers in diet on the community structure and the grazing rate of ruminal protozoa by Fluorescence-Labeled Bacteria (FLB) technique. Four Xuhuai goats with permanent cannulas were used in a 4x4 Latin squares and diets were divided into A (54.87%), B (44.23%), C (33.72%) and D (23.23%), on the basis of NDF content in diet. The research results showed that the NDF content in diet had a profound influence on the rumen fermentation and subsequently modified the structure and the grazing rate of protozoa. Percentages of <I>Entodiniinae</I> and <I>Isotrichidae</I> were much higher in group C and D, whose diets containing low NDF content, the reverse was true for <I>Diplodiniinae</I> or <I>Ophryoscolecinae</I>, their proportions were higher in group A and B, whose diets containing high NDF content while, <I>Entodiniinae</I> was the dominant population of protozoa in the rumen. Furthermore, significant differences were found in protozoa grazing rates between groups and the lowest rates (366.7 cells h<SUP>-1</SUP>) falling in group B containing 44.23% NDF. And also, marked difference was found in the predation rates among genus and there were 361.9, 606.3 and 607.5 cells h<SUP>-1</SUP>, respectively for <I>Entodiniinae</I>, <I>Diplodiniinae</I> and <I>Ophryoscolecinae</I> and the grazing rate of <I>Entodiniinae</I> were significantly lower than those of both <I>Diplodiniinae</I> and <I>Ophryoscolecinae</I>. Community structure and grazing rate of rumen protozoa were modified by dietary NDF content.
ER  -