Microbial Polysaccharidase Activities Associated with Rumen Particulate Material and Feed Particles Incubated in Nylon Bags in the Rumen
نویسندگان
چکیده
منابع مشابه
Microbial attachment and feed digestion in the rumen.
Direct microscopic examination of the rumen and its contents shows microbial populations largely attached to feed particles in the digesta. Most feeds contain a surface layer that is resistant to attachment and therefore to digestion. Infiltration of these recalcitrant epidermal layers through damage sites or through focused enzymatic attack is essential for initiation of the digestive process....
متن کاملFormation of bacterial microcolonies on feed particles in the rumen.
Examination of particulate feed that had been digested in vivo in the rumen, and of the leaves of specific legumes that had been digested in vitro by a mixed population of rumen bacteria, showed that very extensive glycocalyx-enclosed bacterial microcolonies developed on many of the available surfaces. Some of these adherent bacteria colonized a surface almost exclusively and attracted another ...
متن کاملThe Estimation of Feed Protein Degradability in the Rumen Using Nylon Bag, Microbial Labelling (s) and Plant Labelling (n) Techniques
Three techniques for estimating rumen protein degradability were used together with in vivo apparent nitrogen digestibility estimates from sheep fed dried chopped Pangola grass or Siratro. The techniques used were 1) nitrogen disappearance from nylon bags suspended in the rumen, 2) S labelling of rumen microbial protein with plant nitrogen degradability calculated as the difference between micr...
متن کاملA comparison of methods for the estimation of the proportion of microbial nitrogen in duodenal digesta, and of correction for microbial contamination in nylon bags incubated in the rumen of sheep.
Four sheep, each fitted with cannulas in the rumen and proximal duodenum, were given two diets (1390 g dry matter (DM)/d) consisting of lucerne (Medicago sativa) pellets (24.2 g nitrogen/kg DM) plus pelleted reed canary grass (Phalaris arundinacea; 14.1 g N/kg DM) or chopped hay (11.8 g N/kg DM) at intervals of 2 h. Flow of duodenal digesta measured by reference to the markers 51Cr-EDTA and 103...
متن کاملColonization and source of N substrates used by microorganisms digesting forages incubated in synthetic ®bre bags in the rumen
Six mature sheep were fed restricted amounts of either a medium quality roughage or a 1 : 1 mixture of the roughage and barley grain. Disappearance of DM of three roughages (barley straw, oat hay and lucerne hay) from synthetic ®bre bags incubated in the rumen for 6 and 24 h was determined. Also, during intraruminal infusions of NH4C1, synthetic ®bre bags containing each of the three roughages ...
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ژورنال
عنوان ژورنال: Asian-Australasian Journal of Animal Sciences
سال: 1989
ISSN: 1011-2367,1976-5517
DOI: 10.5713/ajas.1989.400