Difference in calcium speciation in leaves of golden Camellia species from calcareous soil and acidic soil habitats

In order to study the calcium speciation characteristics in leaves of golden Camellia species under different habitats, 10 species of golden Camellia from calcareous soil habitats and four species from acidic soil habitats were used as the research objects. The calcium content (Soil-Ca) and pH (Soil-pH) of habitat soil, and the contents of calcium nitrate and calcium chloride (AIC-Ca), water soluble organic acid calcium (H2O-Ca), calcium pectate (NaCl-Ca), calcium phosphate and calcium carbonate (HAC-Ca), calcium oxalate (HCl-Ca), calcium silicate (Res-Ca), and total calcium (Tot-Ca) of leaves were measured. The results were as follows: (1) the Soil-Ca and Soil-pH of calcareous soil were extremely significantly (P