路灯照明对杏树行道树生长及光合的影响

Effect of Street Lamp Lighting on Growth and Photosynthesis of Apricot Street Tree

对路灯照射条件下杏树行道树生长、光合及叶绿素含量的调查与测定发现:HPS路灯照射可显著增加杏树行道树的新枝生长量;杏树行道树的光合速率、气孔导度和胞间CO2浓度的日变化均随光强的单峰型变化呈双峰型曲线变化响应;HPS灯照射条件下的杏树光合速率和胞间CO2浓度显著高于LED灯;从杏树各光合指标的夜间变化来看,路灯的照射仅在一定程度上延长了杏树的光合时间,但光合作用甚微;杏树行道树的叶绿素含量以靠近光源的略高,但光源的远近和类型均不能显著改变其含量.

According to the investigation and determination for growth,photosynthesis and chlorophyll content of apricot street tree（ Armeniaca vulgaris）,under the circumstance of street lamp irradiation,the results showed that HPS lamp lighting could significantly increase new branches of the apricot street tree,its photosynthetic rate,stomatal conductance and intercellular CO2 concentration were bimodal type curves with unimodal sort change of light intensity.Moreover,photosynthetic rate and intercellular CO2 concentration exposed to the HPS lamp were remarkably higher than that under the LED lamp; to a certain extent,the street light irradiation could extend the apricot photosynthetic time,but with little photosynthesis. And the chlorophyll content of the apricot was slightly higher near the light source,however,it could not be significantly changed by the distance and type of light source.