TEMPERATURE EFFECTS IN SOIL

摘要: Introduction Soil temperature plays a central role in all soil processes. and near-ground air temperatures are powerful “biocontrollers.” In temperate climates, the transition from nongrowing to growing season occurs when rises above threshold or “base temperature,” Tb (e.g., about 5 C for pastures). Temperature drives chemical biological processes, leading Q10 concept described below. Biological “clocks” clock which determines developmental stages of plant) run not by time alone but days) multiplied (in degrees). This leads “thermal time” (expressed as “day-degree sum”). properties processes controlled complex set factors, most strongly water temperature. Thus, it may be impossible isolate quantify dependence process simple mathematical form, due confounding effects, especially water. Where possible, equations dependences given Climate change increases our need understand effects soil. Globally, “temperature increase