天津外环线主要树种枝条枯死原因分析

2007年秋季对天津外环线树木枯枝情况进行了调查分析,发现天津市外环线树木枯枝现象比较普遍,平均枯枝率达29.01%。枯枝最严重的是柳树,其次是白蜡、毛白杨等。外环线外侧树枝的枯死程度明显比内侧树的严重。树龄的大小不是决定树木枯枝的主要因素,环境的影响是决定因素之一,其中地表水的含盐量和含钠量与树木的枯枝程度有密切关系。

Analysis on Death Cause of Branch of Main Trees along the Tianjin Outer Circle Road

In the autumn of 2007,the dead branches of trees along the Tianjin outer circle road were investigated,and it found that dead branches were much common.The average rate of trees with dead branches was 29.01%.Willow displayed the most serious dead branches,next were ash and poplar.The amount of dead branches in trees along the outside of outer circle road was more se-rious than that of trees along the inside of outer circle road.It seems that age of trees was not the primary factor resulted in dead branches ...