吉林延边地区土壤钙元素生态地球化学

Ecological Geochemistry of Calcium in Soil of Yanbian Area,Jilin

在吉林延边地区系统的野外调查和土壤及苹果梨果实样品采集、测试的基础上,采用统计对比及相关分析方法研究了土壤钙元素全量、交换性钙及果实钙含量的空间差异,以及土壤-果实系统中钙元素的转化吸收特征及其对果实品质的影响,目的在于揭示钙元素的迁移转化规律及其生态效应,为土地利用服务。结果表明:延边地区土壤中钙全量总体上缺乏,不同研究区土壤-果实钙元素转化吸收差别明显;果实中钙元素含量趋于一致,其吸收系数在可变范围内与土壤交换性钙含量呈极显著负相关;土壤交换性钙含量与pH值呈极显著正相关,与果品品质的4项指标(总糖、总酸、可溶性固形物和维生素C)具有显著相关性,其含量丰富有利于果品品质的提高。

Based on systematic field investigations and sample collection and test of soil and apple-pear in Yanbian area,by using methods of statistical comparison and correlation analysis,we studied on the spatial differences of soil total calcium,soil exchangeable calcium and calcium in fruit,calcium’s convert-absorption characteristics in soil-fruit system and the effect on fruit quality.The aim of the research is to reveal calcium’s migration and transformation law and its ecological effect serving for land use.The results show that total calcium is generally lacked in soil of Yanbian area,and calcium’s convert-absorption in soil-fruit system differs a lot in different areas.The results also show that calcium’s absorption in a variable range has a significant negative correlation with the content of exchangeable calcium in soil.Our results indicate that the exchangeable calcium of soil has a significantly positive correlation with pH of soil and also correlates with the four indexes representing fruit quality,rich content of calcium is helpful to fruit quality.