Kalkhaltigen

Kalkhaltigen describes substances or materials that contain significant amounts of calcium carbonate (Kalk) or lime. The term is used across several disciplines, including geology, hydrology, soil science and biology, to indicate a content of calcareous minerals or a tendency to be alkaline.

In soils, kalkhaltige Böden have a high carbonate content and a correspondingly high pH. They often form in regions with limestone or dolostone bedrock or where groundwater brings carbonate to the surface. Such soils tend to limit the availability of certain nutrients, especially micronutrients like iron and manganese, for some plants and crops. Because of their alkalinity, management practices differ: liming acidic soils is unnecessary and can be inappropriate if the soil is already calcareous.

In waters, kalkhaltiges Wasser contains dissolved calcium and carbonate ions, contributing to water hardness. Temporary (carbonate) hardness arises from bicarbonates that can be precipitated as lime scale on pipes and fixtures when water is heated. While not typically harmful to human health, high calcium carbonate content affects industrial use, taste, and appliance efficiency.

In geology and geology-related fields, kalkhaltige Gesteine encompass rocks rich in calcium carbonate, such as limestone and dolostone. These rocks form in marine environments and are prone to karst processes, including dissolution, cavern formation, and distinctive landscape features.

Ecologically, calcareous conditions influence organisms that build shells or skeletons from calcium carbonate. Rising acidity in oceans and soils can affect availability of carbonate ions, with broader implications for calcareous organisms and related ecosystems.