影响街道绿化樟树叶片黄化的土壤障碍因子.

To investigate the main factors affecting chlorosis of camphor tree leaves in Zhangjiagang city, taking the site soil of chlorosis camphor tree on both sides of the 4 main streets in Zhangjiagang city as research object and with the site soil of normal camphor tree as contrast, the soil samples from 0 to 20 cm and from 20 to 40 cm were collected, and the physical and chemical properties of soil sample were determined. The relationship between chlorosis camphor trees and soil physical and chemical properties was analyzed. The results show that soil pH, HC03 -, available phosphorus and available copper of chlorosis trees are higher than those of normal trees, while organic matter, available nitrogen, available potassium, available iron, available manganese and available zinc are lower. Soil pH, HC03 -, available phosphorus and available copper are negative correlation with available iron, while organic matter, available nitrogen, available potassium, available manganese and available zinc are positive correlation with available iron. [ABSTRACT FROM AUTHOR]