两种抗旱剂对大叶黄杨光合特性的耦合效应  

Coupling effect of two drought-resistant agents on photosynthetic characteristics of Euonymus japonicus

作　　者：王勇[1] 杨培岭[1] 任树梅[1] 

机构地区：[1]中国农业大学水利与土木工程学院

出　　处：《应用生态学报》2007年第3期514-518,共5页Chinese Journal of Applied Ecology

基　　金：国家高技术研究发展计划资助项目(2002AA2z4281-06).

摘　　要：通过田间试验,研究了FA旱地龙和BGA两种新型抗旱剂对大叶黄杨叶片光合特性的耦合影响.结果表明:FA旱地龙和BGA均能使大叶黄杨叶片的气孔导度(gs)和蒸腾速率(Tr)缩小,净光合速率(Pn)和Pn/Tr增加;受BGA影响,FA旱地龙对未施用BGA叶片gs和Tr的抑制作用比对施用BGA叶片的抑制作用显著;FA旱地龙对未施用BGA叶片的Pn和Pn/Tr有促进作用,对施用BGA叶片的Pn和Pn/Tr有抑制作用;FA旱地龙对未施用BGA叶片的作用时间明显比对施用BGA叶片的作用时间长.BGA对FA旱地龙作用效果的影响原因可能与BGA和植物本身的光合特性有关.未施用BGA大叶黄杨适宜的FA旱地龙喷施浓度为2g.L-1,FA旱地龙不适宜于施用BGA的大叶黄杨.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 （Tτ） , and increase the net photosynthesis rate （Pn） and Pn/Tτ of E. japonicus leaves. The inhibitory effect of FA HDL on gs and Tτ was more significant when BGA was not applied. FA HDL inhibited the Pn and Pn/Tτ 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·L^-1 , and FA HDL was not appropriate to the E. japonicus applied with BGA.

关 键 词：抗旱剂 光合特性 耦合影响 大叶黄杨 作用时间 

分 类 号：S687[农业科学—观赏园艺]