Study on the characteristics of calcium forms of saline alkali soil in Tianjin Binhai New Area

doi:10.14088/j.cnki.issn0439-8114.2022.12.006

Abstract

Abstract: The effect of soil salinity and alkali on calcium forms in the coastal saline alkali area was explored. Soil samples were collected from typical saline-alkali areas in Tianjin Binhai New Area, the contents of total calcium, exchangeable calcium and water-soluble calcium in soil were determined, and the effects of total salt content and pH on the content of calcium forms and the relationship among the three calcium forms were analyzed as well. The results showed that the total salt content was significantly positively correlated with the contents of water-soluble calcium and exchangeable calcium, but not with total calcium; the pH was significantly correlated with the content of water-soluble calcium, but not with total calcium and exchangeable calcium. Exchangeable calcium was significantly correlated with water-soluble calcium and total calcium, and water-soluble calcium was significantly correlated with total calcium. In conclusion, the total salt content and pH of coastal saline-alkali soil had significant effects on water-soluble calcium and exchangeable calcium, but had little effect on total calcium content. The soil exchange calcium content in coastal saline alkali land was sufficient, but it was less effective for plants. It was suggested to remediate coastal saline soil to reduce pH or increase the application of exogenous calcium to alleviate calcium deficiency.

Key words: saline-alkali soil, total salt content, pH, calcium form, Tianjin Binhai New Area

CLC Number:

S156.4

ZHAO Jie, XIAO Hui, WANG Li-yan, LI Meng-qi, ZHANG Hui, WANG Xiao-feng. Study on the characteristics of calcium forms of saline alkali soil in Tianjin Binhai New Area[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(12): 27-30.

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