Alexandra Lengling

University of Bonn | Uni Bonn · Institute of Agricultural Engineering (ILT)

Pig farming in mechanically ventilated barns requires much electricity for ventilation or exhaust air purification. Furthermore, thermal energy is needed to fulfill the animals' temperature requirements, especially in piglet rearing. Electrical and thermal energy input leads to CO2 emissions and operating costs. Up to 90% of heat losses are due to...

Pig farming requires high amounts of electrical energy to operate the technical equipment inside the barns (e. g. ventilation, exhaust air treatment). Simultaneously, piglet rearing requires much thermal energy to meet the animal demands concerning air temperatures. The provision of energy is associated with carbon dioxide (CO2) emissions. As heat...

In fattening pig husbandry new feeding concepts offer great potential to reduce nitrogen inputs in the environment. Fattening pigs differ individual in their nutritional needs and feed intake capacity. Classification into performance groups enables to feed the animals efficiently and to avoid luxury consumption. In the study the impact on ammonia e...

Fattening pig husbandry and associated negative environmental impacts due to nitrogen inputs by ammonia emissions are current issues of social discussion. New resource-efficient feeding systems offer great potential to reduce excess nutrient inputs into the environment. Using ultrasound measurements, fattening pigs can be divided into performance g...

The development of the backfat thickness of fattening pigs in relation to their weight allows first conclusions to be drawn concerning the efficiency of individual growth and classification of the carcass. The hypothesis was that, firstly, via measurement of backfat thickness and muscle diameter, their ratio and the quality of the carcass can be pr...

The feeding of fattening pigs and its associated ammonia emissions are current core problems in social debate that affects climate change and sustainability. Feeding methods offer great potential to increase animal welfare and sustainability, and negative impacts on the environment can be reduced. Fattening pigs differ in their performance potentia...