During the forage wilting and ensiling process, a protein degradation takes place that affects the different protein fractions. In addition to the silage conditions, secondary plant ingredients also affect the different protein fractions. In an experiment, the influence of the wilting and ensiling process on the protein fractions of the first and third cuts of the three legume species alfalfa, red clover and sainfoin was investigated. Samples of the fresh, wilted and ensiled material were analysed. Irrespective of legume type, the proportion of non-protein nitrogen (NPN, fraction A) increased significantly from the fresh to the wilted and ensiled material. The highest relative increase in NPN fraction was observed in alfalfa, where the proportion in the silage was 60 % higher than in red clover and sainfoin silage. The condensed tannins in the sainfoin and the polyphenol oxidase activity in the red clover are possible reasons for the lower protein degradation in these two species.
Herholz C., Siegwart J., Bruckmaier R.M., Rytz E., Lamon I., Muhr M. und Stirnimann R.
In both sport and alternative agriculture, horses are once again being used as draught animals. Efficient power transmission plays an important role in the wellbeing of draught horses.
A study by Vetsuisse shows that the outdoor veal calf concept reduces antibiotic consumption in calf fattening by 80%. AGRIDEA has examined the economic viability of outdoor veal calf production and concludes that it cannot compete with conventional veal calf fattening.
In contrast to pigs, dairy cattle are as yet rarely fed protein-reduced diets. Studies show that there is also potential for protein savings in cattle, and thus for reducing ammonia emissions.