通过对鄂尔多斯7种不同种源主要绿化树种胸径(地茎)、树高、冠幅、新生枝长的观测,以及多指标综合分析,以确定每一树种的最佳种源地。研究结果表明,乡土树种和在本地引种驯化多年的树种均表现为本地种源适应性最强,生长表现最好;外来引进树种表现为由自然条件较差地区向自然条件较好地区引进适应性较强,生长表现较好。建议鄂尔多斯市在以后的绿化过程中,要注重推广应用乡土树种和引种驯化多年的树种;而在引进外来树种时,要坚持从相应的种子区(亚区)或相邻的种子区(亚区),以及从自然条件低于鄂尔多斯市的地区选购。

In order to make sure the best provenance of each tree species for afforestation in Ordos,the DBH(ground stems),tree height,crown size,and new branches of seven species were observed.The result showed that local species were the most adaptable and grew well and the species which were in troduced and domesticated for many years and performed well also.It was suggested that native species and species introduced and domesticated for many years should be promoted and applied in the future greening process.We must insist on introducing species from the corresponding region(sub-district)or adjacent seed region(sub-district),and fromthe region with poorer natural conditions.