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土壤胶体是土壤中最细小而最活泼的部分.假如土壤颗粒都象卵石或砂子那么大,而没有胶体颗粒,土壤性质就不会这样复杂.所以,在土壤中土壤胶体的研究是极其重要的.土壤胶体(即土壤胶体颗粒)中有两种不同类型的胶体,即无机胶体(或矿质胶体)和有机胶体(或腐殖质胶体).这两种胶体经常是用各种力紧密结合及结持着的.所以,土壤中实际存在的胶体是有机无机复合胶体或有机矿质复合胶体,有机粘粒复合胶体.当然,矿质胶体和有机胶体也可分别单独存在.
Soil colloids are the smallest and most active part of the soil, and soil colloids are of paramount importance if soil particles are as large as pebbles or sand, without colloidal particles, so that soil properties are not as complex There are two different types of colloids in soil colloids (ie, soil colloidal particles): inorganic colloids (or mineral colloids) and organic colloids (or humic colloids), which are often bonded and held together with a variety of forces Therefore, the actual colloids in the soil are organic-inorganic complex colloids or organic mineral complex colloids, and organic clay colloids, although mineral colloids and organic colloids may also be present separately.