Molasses from the manufacture of beet sugar enables an improvement in the fermentation quality of beet-pulp silages. An in vivo trial with sheep was carried out at Agroscope Posieux in order to ascertain the digestibility of molassed pulp silages. Adult wethers (n = 4 per treatment; 83.9 ± 9.3 kg average weight) were given rations consisting of 40 % pulp silage (with 0 %, 7 % or 14 % molasses) and 60 % hay of the first cut. In a second stage, they were given 60 % pulp and 40 % hay of the second cut. The coefficients of organic matter digestibility, nitrogenous matter and crude energy did not differ as a function of the molasses content incorporated. The coefficients obtained with 40 % pulp in the ration were greater (p < 0.01) than those obtained with 60 % pulp. Cell-wall constituent digestibility (crude cellulose, lignocellulose and cell walls) differed neither as a function of the amount of molasses added nor as a function of the percentage of pulp in the ration.
Pontiggia A., Münger A., Ammer S., Philipona C., Bruckmaier R. M., Keil N.M., Dohme-Meier F.
Even in temperate climate zones, an increase in the ambient temperature and solar radiation can cause heat stress in grazing dairy cows. Agroscope studied the physiological changes in cows caused by increasing heat load.
Lazzari G., Münger A., Heimo D., Seifert S., Camarinha-Silva A., Borda-Molina D., Zähner M., Schrade S., Kreuzer M., Dohme-Meier F.
In dairy cows, herbage-based diets often lead to increased nitrogen excretion. Tanniferous sainfoin and extract of acacia can reduce nitrogen excretion from urine and thus ammonia volatilization from slurry.
Excessive nitrogen inputs from the air lead to over-fertilisation of sensitive ecosystems. Continuous feeding optimisation can make an important contribution to reducing ammonia losses and thus nitrogen inputs.