The ratio of the content of an element in topsoils (depth 10-20 cm) to its content in deep soils (depth 150-200 cm) is called artificial environmental concentration coefficient in soils.

One 2×2 factorial design trial was conducted to study the effects of water temperature and environmental enrichment on production performance,water consumption,nutrients utilization and welfare on weaned piglets in winter,for 40 days.

Four trails were conducted to evaluate the effects of environmental enrichment, stocking density; water temperature and fan ventilation on sheep welfare.

A study was conducted to investigate effects of environmental enrichment and stocking density on performance,serum cortisol concentrations,meat quality and sarcous pH of sheep,twenty four small tail han sheep were assigned to three treatments:①confinement in a pen(A);②confinement in a pen with a yard(B);③confinement in a pen with a yard and environmental enrichment as well(C).

Fundamental Conception of the Chinese Classical Garden: Integration of Man-made Environment and Natural Environment;

Human being′s living environments include natural environment and artificial environment,but the existing Environmental Law doesn′t give an explicit definition of the artificial environment.