Strukturkalkningens möjlighet att hindra fosforutlakning
en litteraturstudie
The purpose of this essay is to find out if liming with Ca(OH2) and CaO can reduce leachingof phosphorus from agricultural land and the problem with eutrophication. This purpose alsoincludes getting knowledge about how to make the phosphorus retained in the soil and beaccessible for the plants. This essay is supposed to show if more research is needed in thissubject. There has not been much research about this subject and therefore the amount ofmaterial to study is limited in this literature review. The research reports that have beenstudied have similar results. Liming does improve the soil structure and make the phosphorusmore accessible to the plants as the phosphorus binds to calcium ions instead of iron oraluminum. Improvement of soil structure reduces the leakage as phosphorus bound toparticles remain inside the soil. Also lime mixed in sludge does give these effects. Moreresearch is needed about the long time effects from liming. Today it is known that thestructure improvement does remain for more than ten years but the permanency of thechemical changes is not known. The soil type and clay content does affect the structural andchemical properties in a soil and therefore more field experiments are needed to includeeffects of liming in varying soil types. More research is also needed to get an overall picturewith both drainage water and surface runoff. The conclusion still is that liming can reducephosphorus losses.