大同盆地盐碱地生态修复利用植物的初步选择
Initial selection of plant species for ecological restoration in salinized soil in Datong Basin.
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摘要: 土壤盐碱化是大同盆地生态恶化的主要原因。本文对大同盆地盐碱状态和抗逆树种的栽培及其抗盐碱能力进行了初步分析。结果显示，大同盆地为寒、旱、多风气候，土壤盐碱化严重而且植被稀少。在初步分析的基础上，选取15个树种进行盐碱地栽培实验，其中成活率较高的依次为枸杞、新疆杨、柽柳、白榆、沙枣、漳河柳。盐胁迫6个当地栽培树种的幼苗，并测定幼苗的形态特征、光合速率、气孔阻力、蒸腾速率、细胞间隙CO2浓度及细胞膜透性等指标，进行综合评价，结果表明，耐盐性从高到低依次为柽柳枸杞樟子松杜松白榆新疆杨。Abstract: Soil salinization is one of the major causes of ecological deterioration in the Datong Basin, Shanxi Province. We analyzed the soil salinization in the Datong Basin and investigated the cultivation of salt-tolerant plant species and their tolerant capacity .The results showed that the climate of the Datong Basin is cold, dry and windy; soil salinization is very serious and vegetation is sparse. Fifteen species were first selected for the cultivation experiment in salinized soil; the survival rate of the first six species decreased in order as follows: Lycium chinense, Populus alba var.pyramidali, Tamarix chinensis, Ulmus pumil, Elaeagnus angustifolia and Salix matsudana. Further, six local species were selected to study the effect of salinity stress on their morphological characteristics, photosynthetic rate, stomatal resistance, transpiration rate, intercellular CO2 concentration and the cell membrane permeability. Comprehensive evaluation showed that the salinity tolerance decreased in the order of Tamarix chinensisLycium chinensePinus sylvestris var.mongolicaJuniperus rigidaUlmus pumilaPopulus alba var.pyramidali.
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Keywords:
- Datong Basin /
- soil salinization /
- salt-tolerant plants
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