天津滨海新区盐碱土壤钙素形态特征研究  

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

作　　者：赵杰[1] 肖辉 王立艳 李梦琦 张慧 王晓风 ZHAO Jie;XIAO Hui;WANG Li-yan;LI Meng-qi;ZHANG Hui;WANG Xiao-feng(Institute of Agricultural Resources and Environment,Tianjin Academy of Agricultural Sciences,Tianjin 300192,China)

机构地区：[1]天津市农业科学院农业资源与环境研究所,天津300192

出　　处：《湖北农业科学》2022年第12期27-30,共4页Hubei Agricultural Sciences

基　　金：国家科技支撑计划项目(2013BAD05B08);天津市农业科学院院长基金项目(17005);天津市科技计划项目(15ZXZYNC00020)。

摘　　要：探究滨海盐碱地区土壤盐碱对钙素形态的影响。采集天津滨海新区典型盐碱地区土壤样品,测定土壤中全钙、交换性钙、水溶性钙含量,并分析全盐含量、pH对各钙素形态含量的影响以及3种钙形态之间的关系。结果表明,全盐含量与水溶性钙和交换性钙含量均呈极显著正相关,与全钙含量无显著关系;pH与水溶性钙极显著相关,与全钙、交换性钙含量无显著关系。交换性钙与水溶性钙、全钙含量均极显著相关,水溶性钙含量与全钙含量显著相关。综上,滨海盐碱地土壤全盐含量和pH对水溶性钙和交换性钙影响显著,对全钙含量几乎无影响。滨海盐碱地土壤交换性钙含量充足,但对植物有效性小,建议通过改良盐碱地、降低pH或增施外源钙来减缓缺钙症状。The effect of soil salinity and alkali on calcium forms in the coastal saline alkali area was explored.Soil samples were collect⁃ed 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 exchange⁃able calcium,but had little effect on total calcium content.The soil exchange calcium content in coastal saline alkali land was suffi⁃cient,but it was less effective for plants.It was suggested to remediate coastal saline soil to reduce pH or increase the application of ex⁃ogenous calcium to alleviate calcium deficiency.

关 键 词：盐碱地 全盐含量 PH 钙素形态 天津滨海新区 

分 类 号：S156.4[农业科学—土壤学]