Carbohydrates were the very important and liable soil organic compounds.Their responses to many factors such as cultivations and eco\|environmental changes are much more sensitive than those of total soil organic matter.Several researches suggested that hexoses and pentoses in soils have quite different sources.Hexoses originate from soil microbes,while pentoses mainly come from the decomposition of plant residues.Based on the above knowledge,soil carbohydrate has been proposed as a sensitive indicator to t...