【摘要】 以1年生臭椿幼苗为试材,采用盆栽方法,研究了不同浓度保水剂的使用对盆栽臭椿生长及叶片光合特性的影响,以期为臭椿在华北石质山区的造林及园林绿化应用提供技术参考。结果表明:施用保水剂可以提高土壤含水量、生长量和光合特性参数;不同浓度的保水剂处理对臭椿的侧根长度和数目、总干生物量、根系干质量、地上部分干质量、根冠比等均产生极显著的差异,但对地径的生长无显著影响;不同浓度保水剂明显影响臭椿的净光合速率、蒸腾速率和气孔导度。综合试验结果来看,以0.100%浓度的保水剂效果最好,可以提高臭椿叶片的光合性能,提高植株的根系生长及生物量。更多还原

【Abstract】 One-year-old seedlings of Ailanthus altissima Swingle was used as materials,the experiment was conducted to study the effect of different concentrations of super absorbent polymers(SAP)on growth and photosynthetic characteristics of potted annual Ailanthusaltissima Swingle seedlings,in order to provide the scientific foundation for the application of forestation and landscaping in rocky mountainous area of North China.The results showed that SAP could improve the soil water content,growth and photosynthesis rate.The length and numbers of lateral roots,dry biomass of different parts,ratio of root and shoot,net photosynthetic rate,transpiration rate and stomatal conductance of Ailanthus altissima showed significant differences compared to CK.However,the differences of base diameter between different treatments and CK were not remarkable.The results of the experiment indicated that the concentration of 0.100% SAP was the best concentration to improve the growth and photosynthetic characteristics of Ailanthus altissimaseedlings.更多还原