The new approaches of the animal production systems make managing the mineral nutrition
a challenge. Versus the excessive, trace mineral supply in intensively managed livestock …

Antimicrobials have been used in swine production at subtherapeutic levels since the early
1950s to increase feed efficiency and promote growth. In North America, a number of …

Weaned piglets were fed diets containing 57 (low) or 2425 (high) mg kg− 1 analytical grade
ZnO for a period of 5 weeks. Intestinal contents were sampled in weekly intervals and …

Arable layer of pastureland in Galicia (NW Spain) was monitored for total content of heavy
metals, and analysed by multivariate statistical techniques, in order to investigate the …

Long-term organic fertilizer (OF) application on agricultural soils is known to induce soil Cu
and Zn contamination, along with pH and organic matter changes, which in turn alter the soil …

Current intensive pig production is often associated with environmental burdens. However,
very few studies deal with the environmental performance of both current and alternative …

The 360 feed and manure samples were collected from 150 animal farms in Jiangsu
Province, China and analyzed for heavy metals. Concentrations of Zn and Cu in animal …

Manure management systems are conducive to nutrient and carbon losses, but the
magnitude of the loss highly depends on the nutrient element, the manure management …

Intensification increases the environmental impact of livestock production systems. Efforts to
recycle nutrients in livestock manure for crop production will effectively reduce several …

The environmental stimulants and inhibitors of conjugal plasmid transfer in microbial
communities are poorly understood. Specifically, it is not known whether exposure to …