葉片發育大小和葉麵積大小對作物生長、抗逆性以及產量的形成影響很大，是進行生理生化、遺傳發育
、作物栽培等方麵研究所必需的考慮的內容，也是作物聖戰發育

、產量形成
、pinzhongtexingdezhongyaozhibiao。tongshiyemianjidaxiaozhijiejuedingleguanghezuoyongdeqiangruo，yepianshizhiwujieshouyangguangdezhuyaobuwei
，yinweiyelvsuzhuyaofenbuzaiyepianshang

，eryelvsuyoushiguanghezuoyongdezhuyaochangsuo。yinci，yepiandemianjidaxiao
，zhijiegenguanghezuoyongyouguan。guanghezuoyongshigejileiyoujiwudeguocheng，guanghezuoyongyueqiang，qijileideyoujiwuyueduo，zuowushengchangyuehao

，qizuihoudechanliangyehuiyuegao。yinci
，zainongyeshang
，womenjingchanghuishiyonghuotiyemianjiyilaijinxingmianjideceding。lingwai，yemianjitongshiyefanyingleduizuijibendenenglianglaiyuan――taiyangguangnengdeliyongqingkuang。yekeyitongguotiaozhengyemianjilaitigaolvsezhiwudeshuifenliyonglv，haijuyouyidingdexifeinengli，congshangmiankeyikanchuyemianjicelianghaishibixude。
     現在就來介紹一種葉麵積測量方法：活體葉麵積儀法。
     活huo體ti葉ye麵mian積ji儀yi通tong常chang也ye叫jiao活huo體ti葉ye麵mian積ji儀yi，是shi一yi款kuan可ke以yi精jing確que，快kuai速su無wu損sun傷shang的de測ce量liang葉ye片pian的de葉ye麵mian積ji以yi及ji相xiang關guan參can數shu的de工gong具ju。活huo體ti活huo體ti葉ye麵mian積ji儀yi可ke對dui采cai摘zhai的de植zhi物wu葉ye片pian及ji其qi它ta片pian狀zhuang物wu體ti進jin行xing麵mian積ji測ce量liang。可ke針zhen對dui任ren何he不bu規gui則ze形xing狀zhuang
，任ren何he顏yan色se，任ren何he厚hou度du和he水shui份fen含han量liang的de葉ye片pian表biao麵mian積ji進jin行xing測ce量liang。葉ye片pian小xiao的de直zhi接jie放fang上shang去qu進jin行xing測ce量liang
，而er葉ye片pian麵mian積ji大da的de就jiu進jin行xing切qie片pian計ji算suan，最zui後hou求qiu得de平ping均jun值zhi。活huo體ti葉ye麵mian積ji儀yi的de測ce量liang方fang法fa是shi：先(xian)對(dui)將(jiang)活(huo)體(ti)葉(ye)麵(mian)積(ji)儀(yi)打(da)開(kai)，在(zai)開(kai)機(ji)預(yu)熱(re)進(jin)入(ru)正(zheng)常(chang)測(ce)量(liang)狀(zhuang)態(tai)後(hou)，用(yong)戶(hu)隻(zhi)要(yao)打(da)開(kai)儀(yi)器(qi)的(de)發(fa)光(guang)板(ban)，將(jiang)被(bei)測(ce)葉(ye)片(pian)平(ping)鋪(pu)在(zai)感(gan)光(guang)板(ban)的(de)中(zhong)心(xin)部(bu)位(wei)。合(he)上(shang)發(fa)光(guang)板(ban)蓋(gai)，係(xi)統(tong)將(jiang)自(zi)動(dong)測(ce)量(liang)被(bei)測(ce)葉(ye)片(pian)的(de)表(biao)麵(mian)積(ji)
，並(bing)將(jiang)其(qi)麵(mian)積(ji)值(zhi)保(bao)存(cun)在(zai)儀(yi)器(qi)LCD上顯示。另外，還有跟活體葉麵積儀原理不同但同樣能夠測定葉片麵積的一款儀器：便攜式葉麵積儀。便攜式葉麵積儀可以精確、快速

、無損傷地測量葉片的葉麵積及相關參數，也可對采摘的植物葉片及其它片狀物體進行麵積測量。廣泛應用於農業、氣象、林業等部門。
     yemianjideceliangshibixude，tongguotiaozhengyemianjikeyitigaoshuideliyonglvtigaozhengtidefeiliaoliyonglvzuizhonghuodegaochandexiaoguo，tongshiyekeyiduichongbingzaiqingdezhunquegujihecailihelidebaohucuoshiyouzhongyaodecankaojiazhi。