【摘要】 以呼和浩特市较常用的紫丁香等13种园林树种为材料,通过分析不同PV曲线水分参数的差异,使用系统聚类方法对试验树种进行耐旱性综合评价,得出以下结论:1)通过对13种树种的PV曲线水分参数的分析,得到的耐旱性排序存在显著差异,同一参数在不同月份所得到的耐旱性排序也不相同。2)PV曲线水分参数存在时间和树种的差异性,所以各个指标进行综合评价可以消除该差异性。3)综合考虑各PV曲线水分参数,试验树种的耐旱性由强到弱的顺序是:油松>圆柏>互叶醉鱼草>侧柏>锦带花>华北珍珠梅>火炬树>国槐>山桃>桃叶卫矛>紫丁香>柽柳>山杏。更多还原

【Abstract】 In this research,13 garden tree species in Hohhot were chosen to study the PV curve water parameters,and the system cluster method was used for comprehensively evaluating the drought tolerance of the tested tree species. The conclusions were as follows:( 1) Through analysis of the water parameters of PV curve of 13 species,there existed significant difference among the sorting of drought resistance,and for the same parameters the drought resistance sorting was not the same in different months.( 2) PV curve moisture parameters were different among the different months and different tree species. So using comprehensive evaluation index can eliminate the difference.( 3) Combining all PV curve water parameters,the drought resistance of the tested tree species from strong to weak is: Pinus tabulaeformis > Juniperus chinensis > Buddleja alternifolia > Platycladus orientalis > Weigela florida > Sorbaria kirilowii > Rhus typhina > Sophora japoica > Prunus davidiana >Euonymus bungeanus > Syringa oblata > Tamarix chinensis > Prunus armeniaca.更多还原