Effects of minerals on feed degradation and protein synthesis by rumen micro-organisms in a dual effluent fermenter.

In dual outflow continuous fermenters on a 75:25 hay/barley diet, feed degradation and protein synthesis by mixed rumen microbes were tested in relation to the concentrations of HPO4(2-), HCO3- and Cl- and Na+/K+ ratio in artificial saliva, by applying a 16-run Franquart design, and by fitting second-order polynomial models. The HPO4(2-), HCO3-, Cl- concentrations and Na+/K+ ratio ranged from 0.1 to 4 g.

[Quantification of ammonia in a sample of rumen contents and fermentation with a gas diffusion electrode].

The use of an electrode for the determination of ammonia in rumen and fermentor fluid samples has been evaluated. The amount of interfering volatile bases was negligible in our samples. The memory effect was only significant at the limits of the ammonia concentration range.

Rhizobacteria of maize and their antifungal activities.

During the growing season of 1984, the rhizobacteria (including organisms from the rhizosphere soil, the rhizoplane, and internal root zones) of 47 maize plants (two varieties) sampled from different locations in France and at different growth stages were inventoried. Isolates were characterized by sodium dodecyl sulfate-polyacrylamide gel electrophoresis of their total cell proteins and were found to represent 352 different protein electrotypes. Maize seedlings were initially colonized by a small number of different strains.