竹节草种质资源耐盐性初步评价

以相对地上干重、相对地下干重、叶片枯黄率、叶片颜色、坪用质量为评价指标,在245 mmol/L Na Cl胁迫下,利用水培法对64份竹节草(Chrysopogon aciculatus)种质资源进行耐盐性初步评价。结果表明,各品系之间存在显著(p0.05)或极显著差异(p0.01),各指标的变异系数范围为20.64%(相对地上部干重)~43.40%(相对坪用质量)。相关性分析结果表明,参数指标间存在显著相关性(p0.05)或极显著相关性(p0.01),相关系数最高达到0.912。利用5个指标对64份品系进行聚类分析,在欧式距离18.0处,分为敏盐型、中间型、耐盐型三大类。

Preliminary Evaluation on Salt Tolerance of Chrysopogon aciculatus

Salt tolerance of 64 Chrysopogon aciculatus was carried out by evaluating based on relative shoot dry weight, relative root dry weight, leaf firing percentage, relative leaf color, and relative turf quality on on 245 mmol/L salt treatment. The results showed that there were significant(p<0.05)or very significant(p<0.01)difference among different accessions. Coefficient of variation of different indicators ranged from 20.64%~43.40%, of which the minimum of relative shoot dry weight(20.64%)and maximum of relative turf quality(43.40%). There were significant correlations(maximal correlation coefficient of 0.912)among different indexes of C. aciculatus accessions. Based on five characteristics, 64 accessions were divided into three types, which is salt-sensitive, intermediate and salt tolerance. This results would provide foundation for screening high-quality and salt-tolerant accessions.