The results of a fattening trial with steers covering the weight range 300 kg LW to optimum fatness score were used for an economic analysis comparing the breeds Angus (AN), Simmental (SI), Charolais (CH), Limousin (LI), Blonde d’Aquitaine (BL) and Piemontese (PI). More than 95 % of margin variations are attributed to differences in purchasing costs and produce of sales. Factors of success are: dressing percentage, carcass conformation, and matching the degree of precocity with the feeding intensity such that growth is optimized within the limits set by the market. Under the conditions of the trial, the LI and CH breeds realized the best combination of the factors determining the economic result. Thus, they reached the highest comparable margin per large animal pen unit. There is evidence for better returns for the early maturing breeds AN and SI when maximizing the slaughter weight. The economic result of the late maturing breeds BL and PI can be improved. The corresponding possibilities are presented in part 2.
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.