yepianshizhiwujinxingguanghezuoyongdezhuyaoqiguan
，qizhongyelvsudeduoshaonengzhijieyingxiangguanghesulvdekuaiman，zaiyidingdefanweinei，yelvsuhanliangyueduo，guanghesulvyueqiang。

    光合作用測定儀的de測ce量liang對dui象xiang也ye是shi葉ye片pian，所suo以yi在zai光guang合he測ce量liang試shi驗yan中zhong對dui於yu葉ye片pian的de選xuan擇ze應ying盡jin量liang選xuan擇ze有you代dai表biao的de葉ye片pian。由you於yu植zhi物wu葉ye子zi呈cheng現xian的de顏yan色se是shi葉ye子zi各ge種zhong色se素su的de綜zong合he表biao現xian
，主zhu要yao是shi有you綠lv色se的de葉ye綠lv素su和he黃huang色se的de類lei胡hu蘿luo卜bu素su兩liang大da色se素su之zhi間jian的de比bi例li決jue定ding的de，因yin此ci如ru果guo儀yi器qi測ce試shi區qu大da部bu分fen是shi黃huang葉ye，就jiu應ying該gai選xuan擇ze黃huang葉ye；而如果測試區多數是綠葉，則應該選綠葉進行測試。另外
，葉片的伸展、枯萎、病蟲害以及葉片的寬窄情況都會影響光合速率的測量，因此我們在選擇測試葉片的時候，這些因素都應該考慮進去。
    guanghezuoyongcedingyicedingdejingguanghesulvhezhengtengsulvshidanweiyemianjixiadeceliangzhi，yinciquedingceliangmianjiyeshiguanghezuoyongyicedingguochengzhong
，zhongyaodeyibu

，yinggaigenjuzhiwuyepiandedaxiaoxuanzesuoshiyongdeyeshi，zhiyaoshiyepiandemianjidayuyeshideceliangmianji，namejiukeyibaozhengyeshibeiyepianwanquanchongman，zhezhongqingkuangxiajiubuxuyaogaibianmianjicanshule。
    總zong的de來lai說shuo就jiu是shi，在zai利li用yong光guang合he作zuo用yong儀yi測ce定ding植zhi物wu光guang合he速su率lv時shi，對dui於yu被bei測ce葉ye片pian的de選xuan擇ze是shi非fei常chang關guan鍵jian的de，如ru果guo選xuan擇ze的de不bu合he適shi
，就jiu很hen難nan真zhen實shi反fan映ying出chu植zhi物wu的de光guang合he速su率lv
，要yao選xuan擇ze有you代dai表biao性xing的de葉ye片pian，同tong時shi還hai應ying該gai選xuan擇ze能neng夠gou代dai表biao大da多duo數shu葉ye片pian的de植zhi株zhu，可ke以yi從cong葉ye片pian的de顏yan色se
、狀態等多個角度進行選擇
，這些都是測量的關鍵！