Effect of Mining Dust on Photosynthetic and Physiological Characteristics of Picea schrenkiana Needles
To understand the influence of dust that comes from mining activities on physiological characteristics of Picea schrenkiana needles, relevant indexes of P. schrenkiana leaves were measured by LI-6400 photosynthesis in-strument by selecting the Avril Gou valley as the dust influenced area, and Yangjuan Gou as controlled area ( both of these two sites are located in Banfang Gou Forest Farm of Urumqi County). The results showed that, (1) pho-tosynthetic rate, stomatal conductance and transpiration rate of influenced leaves were reduced by 44%, 44% and 45% respectively, intercellular CO2 concentration and leaf temperature were increased by 191% and 40% respec-tively; (2) compared with natural light, the red and blue light absorption of P. schrenkiana leaves decreased sig-nificantly because of dust retention, and the photosynthetic rate in red and blue light were decreased by 76% in the influenced leaves, while it only decreased 34% in uninfluenced leaves.
NETL
NSTL
万方数据
维普
