鄂尔多斯主要绿化树种适生立地初步研究

摘要

运用实地调查与查阅造林档案资料相结合的方法，研究了鄂尔多斯市9种主要绿化树种在不同立地条件下的树高、胸（地）径、新生枝长度和冠幅，并进行统计分析。结果表明，8种树种在不同立地类型下生长量存在显著差异（ P＜0．05），樟子松、云杉、红瑞木最适立地类型为沙地；油松、金叶榆的适生立地类型为硬梁地和梁地；国槐在覆沙梁地利于粗生长，梁地利于高生长；水蜡和榆叶梅在4种立地类型上生长均较好，水蜡最适合沙地，榆叶梅最适合覆沙梁地；金叶莸在4种立地类型上生长表现无明显差异。相同树种各立地类型间生长量差异的主要原因是不同树种对土壤的要求不同。%Based on field investigation and literature review of afforestation files , we studied 9 kinds of virescence trees species, in terms of DBH (ground stems), tree height, crown, and new branches in different site condi-tions, and also carried out statistic analysis .The results showed that there was significant difference ( P<0.05 ) on the growth vigor in different site types .Pinus sylvestris var.mongolica, Picea crassifolia and Swida alba had best growth performance in sandy site .The suitable site type for Pinus tabuliformis and Ulmus pumila cv.jinye was hard ridge and ridge .Ridge covered by sand was beneficial for thick growth of Sophora japonica, and ridge was beneficial for height growth .Ligustrum obtusifolium and Prunus triloba grew well on all four site types.The sandy site was suitable for Ligustrum obtusifolium , and the ridge covered by sand was suitable for Prunus triloba.There was no significant difference (0.05) in different site type of Caryopteris ×clandonensis“Worcester Gold”.