Meat quality was investigated in 138 steers of the six meat breeds Angus (AN), Simmental (SI), Charolais (CH), Limousin (LI), Blonde d’Aquitaine (BL) and Piedmontese (PI). In one group (Series FG3), steers were slaughtered at the same finishing degree defined by the fat grading class 3 (CH-TAX), and in the other group (Series IMF), upon attaining a target intramuscular fat (IMF) content of 3 – 4 % in the longissimus dorsi muscle which was estimated ultrasonically. In the first group, an average IMF content of 1.7 % was measured, whereas the second group reached an IMF level of 3.2 %. In heavier and fatter animals of Series IMF the pH-fall was quicker. Their meat is also darker and contains about 20 % more heme iron. No quality faults (PSE, DCB) were observed. Meat of AN and CH steers was relatively pale in line with the lowest heme iron contents. In late maturity breeds (LI; BA; PI) the protein content is higher. Very low drip losses were determined in meat of AN steers. But the same breed presented the highest cooking losses.
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.