And then, "311-a" optimum compound design was used to study on remediation of cadmium contaminated soil with calciumcarbonate, 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。
2
Apparent absorptivity of calcium were obviously elevated in the calcium amino acid compound group than in the calciumcarbonate 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）。
3
This technology changes the ore into magnesium, calciumcarbonate and compound fertilizer through calcination, separation, carbonization and roasting.