And then, "311-a" optimum compound design was used to study on remediation of cadmium contaminated soil with calcium carbonate, calcium magnesium phosphate and humic acid.
然后采用“311—a”最优混合设计，研究碳酸钙、钙镁磷肥、胡敏酸组合配比对治理土壤镉污染的效果。
Apparent absorptivity of calcium were obviously elevated in the calcium amino acid compound group than in the calcium carbonate group ( P< 0.01).
氨基酸钙复合物的钙表观吸收率两组差异非常显著（P< 0 .0 1）。
This technology changes the ore into magnesium, calcium carbonate and compound fertilizer through calcination, separation, carbonization and roasting.
该工艺将矿石通过煅烧、分离、碳化、焙烧等过程，加工成镁、碳酸钙和复合肥。
This technology changes the ore into magnesium, calcium carbonate and compound fertilizer through calcination, separation, carbonization and roasting.
该工艺将矿石通过煅烧、分离、碳化、焙烧等过程，加工成镁、碳酸钙和复合肥。
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