摘要
为探讨几种耐盐乔木和灌木对滨海围垦区盐碱化土壤的适应能力,采用LI-6400光合作用测定仪在植物生长旺季对崇明东滩围垦区同期栽种的9种耐盐碱陆生植物物种的叶片光合特性进行测定。结果表明,在刺槐(Robinia pseudoacacia)、石楠(Photinia serrulata var.serrulata)、女贞(Ligustrum lucidum)和蜀桧柏(Sabina komarovii)4种乔木物种中,刺槐的最大光合速率、表观量子效率和光饱和点最高,分别为21.28μmol·m-2·s-1、0.049μmol·μmol-1和2 031μmol·m-2·s-1,但光补偿点却较低(13.60μmol·m-2·s-1)。在紫穗槐(Amorpha fruticosa)、伞房决明(Cassia sophera)、木芙蓉(Hibiscus mutabilis)、海滨木槿(Hibiscus syriacus)和慈孝竹(Bambusa multiplex)5种灌木物种中,紫穗槐的最大光合速率、表观量子效率和光饱和点最高,分别为20.92μmol·m-2·s-1、0.048μmol·μmol-1和1 980.67μmol·m-2·s-1,但光补偿点却最低(2.95μmol·m-2·s-1)。在这些灌木物种中,紫穗槐具有最高的水分利用率(10.58μmol·mol-1)和较低的蒸腾速率(1.86 mmol·m-2·s-1)。因此,就叶片光合特性而言,刺槐和紫穗槐分别是对滨海围垦区盐碱化土壤具有良好适应性的乔木和灌木树种。
In order to investigate adaptability of several salt-tolerant species of trees and shrubs to saline alkali soil in coastal polders, leaf photosynthetic characteristics were determined of 9 such species of plants transplanted in the same pe- riod in the Dongtan Polder of Chongming Island. It was done during their peak growing season using Li-6400 portable pho- tosynthesis analyzers. Results show that among the four species of trees （ Robinia pseudoacacia, Photinia serrulata var. ser- rulata, Ligustrum lucidum and Sabina komarovii）, R. pseudoacacia was the highest in Pmax（21.28μmol·m-2·s-1）, YAQ（0. 049 μmol·mol-1 ） and PLs（2 031μmol·m-2·s-1 ）, but lower in PLc（ 13.60 μmol·m-2·s-1） ; and among the five species of shrubs （Amorpha fruticosa, Cassia sophera, Hibiscus mutabilis , Hibiscus syriacus and Bambusa multi- plex） , A. fruticosa was the highest in Pmax（20. 92 μmol·m-2·s-1 ） , YAQ（0. 048 μmol·mol-1 ） and PLS（ 1 980. 67μmol·m-2·s-1）, but the lowest in PLC（2. 95μmol·m-2·s-1 ）, and A. fruticosa was the highest in Ewu（ 10. 58 p^mol ~ mo1-1 ） and lower in Tr（ 1.86 μmol·m-2·s-1 ）. The findings suggest that： in terms of leaf photosynthesis, R. pseudoaca- cia and A. fruticosa are the tree and shrub species that are more adaptable to saline alkali soil in coastal polders, which can serve as scientific basis for revegetation in coastal polders.
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2014年第1期113-118,共6页
Journal of Ecology and Rural Environment
基金
国家科技支撑计划(2010BAK69B15)
崇明生态岛建设科技支撑项目(11dz1210903)
关键词
滨海围垦区
光响应曲线
光合参数
乔木
灌木
耐盐
coastal polder
light response curve
photosynthetic parameter
tree
shrub
salt-tolerant
