摘要
灌木树种是城市绿化的重要组成部分。本研究以目前北方城市绿化造林常用的13个灌木树种为材料,测定其生理指标,并对各项生理指标进行主成分和隶属函数分析,评估不同品种的抗旱能力,以期为北方地区造林树种的选择提供重要的依据。结果表明,不同物种干旱处理后各项生理指标,如相对水含量、相对电导率、以及可溶性糖、叶绿素和脯氨酸含量等的变化规律均存在明显差异,采用单一生理指标比较物种间抗旱性有一定的偏差。主成分和隶属函数分析表明,13个灌木树种的抗旱性由高到低依次为:金焰绣线菊>紫叶小檗>沙地柏>红宝石海棠>珍珠梅>锦带>胡枝子>黄栌>水蜡>金银木>红瑞木>紫穗槐>连翘,分析结果与实际表现相吻合。
Shrub species are indispensable to the urban greening. Thirteen common used shrub species in the northern city of China were evaluated for their drought tolerance through the measurement of physiological indexes and principal component and subordinate function analysis,so as to provide an important evidence for the species screening of the afforestation program in the North. The results showed that the physiological indexes varied significantly among 13 species under water stress,including the relative water content,electrolyte leakage,chlorophyll content,soluble sugar content and free proline content. Single physiological indicator could not assess the plant drought tolerance comprehensively. Analysis of principal component and subordinate function showed the comprehensive drought tolerance of the 13 shrub species was ranked in decreasing order of Spiraea bumalda cv. coldfiame ﹥ Berberis thunbergii cv.atropurpurea ﹥ Sabina vulgaris ﹥ Malus spttabilis Royalty ﹥ Sorbaria sorbifolia ﹥ Weigela florida ﹥ Lespedeza ﹥Cotinus coggygria ﹥ Ligustrum obtusifolium ﹥ Lonicera maackii ﹥ Cornus alba ﹥ Amorpha fruticosa ﹥ Forsythia suspensa,which was consistent with the actual performance.
出处
《核农学报》
CAS
CSCD
北大核心
2016年第7期1446-1451,共6页
Journal of Nuclear Agricultural Sciences
基金
北京市科委项目"首都平原百万亩造林科技支撑工程"(Z121100008512002)
北京市自然科学基金项目(5122019)
关键词
灌木
抗旱
生理指标
主成分分析
综合评价值
shrubs
drought tolerance
physiological index
principal component analysis
comprehensive evaluation value
