Effects of Different LED Light Source Treatments on Photosynthesis of Pepper
Qian Shengyan
Liu Shiqi
Liu Yingying
Lian Haifeng
Chen Yafei
Zhang Xianzheng
Abstract：With Zaozhuangbopi pepper as material,the effects of different LED light qualities and light intensities on photosynthetic parameters of pepper were studied.The results showed that the modified rectangu-lar hyperbola model could well simulate the light response curve of pepper leaves.Under different LED light source treatments,the net photosynthesis rate (Pn),stomatal conductance (Gs)and transpiration rate (E)of pepper leaves all increased with the increase of photosynthetically active radiation,however,the intercellular CO2 concentration (Ci)decreased.We also found that the net photosynthetic rate under white,sapphire blue light and red light of 630 nm was higher than that under other light qualities.The absorption rate and utiliza-tion rate of CO2 were higher under white light.The stomatal conductance under red light was higher than that under other light qualities.The transpiration rate under red light of 630 nm and white light was higher than that under other light qualities.Above all,the photosynthetic ability of pepper under white light and red light of 630 nm was relatively stronger.
Keywords：PepperLED light sourcePhotosynthesisLight qualityPhotosynthetically active radiation
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 54-59 )