【摘要】 基于叶片水分状况的抗旱性衡量指标主要有自束比、自然饱和亏、临界饱和亏。采用投影寻踪法对黄土高原15个参试沙棘品种的3个抗旱性衡量指标进行综合评价,发现:按抗旱性排序,"红霞""蛮汉山雌"这两个中国沙棘品种排在前两位,抗旱性最好;"阜欧""太阳"这两个大果沙棘品种排在最后两位,抗旱性相对较差;其余杂交沙棘均位于其间,抗旱性居中。就单指标来看,自然饱和亏较其他两指标对抗旱性的反映更好。更多还原

【Abstract】 The main drought resistance indexes based on leaf water status are self bundle ratio,natural saturation deficit and critical saturation deficit. The paper comprehensively evaluated 3 drought resistance indexes of 15 seabuckthorn varieties in the Loess Plateau by using the method of projection pursuit. It finds out that a) sort by drought resistance,the two Chinese seabuckthorn of Hongxia and Manhan Shanci rank in the top two and the drought resistance is the best; b) the two big fruit seabuckthorn of Fuou and Taiyang rank last and the drought resistance is relatively poor and; c) the other hybrid seabuckthorn are located in the middle of drought resistance. In terms of single index,the natural saturation deficit reflects drought resistance better than the other two indexes.更多还原