期刊论文

Effects of simulated atmospheric ammonium sulfate pollution on growth and photosynthetic characteristics of Cinnamomum camphora seedlings

中文

生态科学

1008-8873

2020

39

03

44-48

10.14108/j.cnki.1008-8873.2020.03.007

2017YFC0505506:国家重点研发计划 2015BAD07B04:“十二五”国家科技计划农村领域项目 XLK201970:湖南省林业科技创新专项 HNGYL-2019-01:湖南省林业科技创新专项 XLKPT201710:湖南省林业科技项目

本校为第一机构

通过室内盆栽实验研究了大气颗粒污染物硫酸铵对香樟幼苗生长及光合特性的影响。结果表明,香樟幼苗叶片涂抹硫酸铵处理对植物生长无显著影响;低浓度硫酸铵(2 g·L~(-1))提高了叶片叶绿素含量,而高浓度(4 g·L~(-1))却降低了叶片叶绿素含量;与对照相比,低浓度处理的香樟叶片净光合速率、气孔导度、胞间二氧化碳浓度与蒸腾速率无显著差异;高浓度处理的香樟叶片净光合速率与蒸腾速率高于对照,而气孔导度与胞间二氧化碳浓度与对照无显著差异。机理分析表明,硫酸铵颗粒物主要通过影响叶片气孔导度来影响植物光合特性。

The effects of atmospheric particulate pollutant ammonium sulfate on the growth and photosynthetic characteristics of Cinnamomum camphora seedlings were studied by houseplant experiment and its mechanism was discussed. The results showed that ammonium sulfate particles had no significant effect on the growth of Cinnamomum camphora seedlings;the effect on leaf chlorophyll content was weakly promoted at low concentration and high concentration inhibition. Net photosynthetic rate and stomatal conductance of low concentration treated Cinnamomum camphora leaves were not different as compared with c...