Abstract:

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.

Key words: Yanbian area, Jilin, soil, calcium, ecological geochemistry