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钙在土壤中有两种形态，一种是不溶解形态钙，另一种是可溶解形态钙，即代换性钙，能被植物吸收利用的是代换性钙，在土壤中为粘土胶粒所吸附，所以种植蔬菜需补钙是因为菜地土壤中缺乏可代换性钙。那么为什么菜地会缺钙呢？这个问题比较复杂，主要是： 一、我国土壤的含钙且偏
Calcium in the soil has two forms, one is insoluble form of calcium, the other is soluble form of calcium, that is, substitutional calcium, plants can be substituted by the use of substitutional calcium in the soil for clay glue Granules adsorbed, so planting vegetables to be calcium because of the lack of fertile soil in the vegetable exchangeable calcium. So why vegetables will calcium deficiency? This issue is more complicated, mainly: First, China’s soil calcium and partial