中文摘要：

为研究小麦近缘属种的耐低磷特性,本试验通过砂培法,以9种山羊草为供试材料,对低磷和正常供磷2个处理下山羊草苗期的相对地上部干重、相对根干重、相对生物量、相对根长、相对根冠比、相对磷积累量、相对磷吸收效率进行研究。结果表明,不同基因型山羊草对低磷胁迫的反应存在一定的差异。相关分析和主成分分析结果表明,相对地上部干重、相对根干重、相对生物量和相对磷积累量可作为耐低磷基因型山羊草筛选的指标。筛选结果表明,双角、粘果、小伞和拟斯卑尔脱山羊草为耐低磷型山羊草,尾状山羊草为磷敏感型山羊草。

英文摘要：

In order to study the tolerance characteristics to low phosphorus of Aegilops, the experiment was carried under two P levels through sand culture methods with 9 genotypes at seedling stage. Some biologic and plant nutrient characteristics of Aegilops were investigated. They were stem dry weight, root dry weight, biomass, root length, root-shoot ratio, phosphorus accumulation and phosphorus uptake efficiency. The results showed that there were differences of the tolerance characteristics to low phosphorus among Aegilops. Correlation analysis and principal component analysis showed that stem dry weight, root dry weight, biomass and phosphorus accumulation can be used as screening indicators of the tolerance to low phosphorus of Aegilops. Both of the agronomic characters observation results and the comprehensive evaluation results showed that Ae. bicornis ,Ae. kotschyi ,Ae. speltoides and Ae. umbellulata had the tolerance characteristics to low phosphorus while Ae. caudata was sensitive to low phosphorus.