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[Coupling effect of two drought-resistant agents on photosynthetic characteristics of Euonymus japonicus]
Yong Wang1, Pei-Ling Yang, Shu-Mei Ren
1College of Water Conservancy & Civil Engineering, China Agricultural University, Beijing 100083, China. wangyonglsx@163.com
Abstract:
A field study on the coupling effect of new drought-resistant agents FA Handilong (FA HDL) and Beijing Green Angel (BGA) on the photosynthetic characteristics of Euonymus japonicus showed that these two agents could all decrease the stomatal conductance (gs) and transpiration rate (Tr) , and increase the net photosynthesis rate (Pn) and Pn/Tr of E. japonicus leaves. The inhibitory effect of FA HDL on gs and Tr was more significant when BGA was not applied. FA HDL inhibited the Pn and Pn/Tr when applied with BGA, but stimulated them when BGA was not applied. Applying BGA could obviously shorten the action period of FA HDL on E. japonicus. The fact that BGA could influence the effect of FA HDL was attributed to the properties of BGA and the photosynthetic characteristics of E. japonicus. The appropriate concentration of FA HDL to the E. japonicus without BGA application was 2 g x L(-1), and FA HDL was not appropriate to the E. japonicus applied with BGA.
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