現在很多大(da)學(xue)都(dou)開(kai)設有(you)植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)理(li)(li)學(xue)這(zhe)一專業(ye)，植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)理(li)(li)學(xue)主要(yao)研(yan)(yan)究(jiu)的(de)(de)(de)是(shi)(shi)植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)命(ming)活動(dong)規律及其與環(huan)境相互關系、揭示植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)命(ming)現象本質的(de)(de)(de)科學(xue)。現代植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)理(li)(li)學(xue)研(yan)(yan)究(jiu)一般分(fen)為(wei)(wei)以下10個(ge)方面：光(guang)合(he)(he)(he)作(zuo)(zuo)用;植(zhi)(zhi)(zhi)物(wu)(wu)代謝(xie);植(zhi)(zhi)(zhi)物(wu)(wu)呼吸;植(zhi)(zhi)(zhi)物(wu)(wu)水(shui)分(fen)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)理(li)(li);植(zhi)(zhi)(zhi)物(wu)(wu)礦質營(ying)養;植(zhi)(zhi)(zhi)物(wu)(wu)體內(nei)運(yun)輸;生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)長與發育;植(zhi)(zhi)(zhi)物(wu)(wu)激素(su);抗逆性(xing);植(zhi)(zhi)(zhi)物(wu)(wu)運(yun)動(dong)等(deng)。光(guang)合(he)(he)(he)作(zuo)(zuo)用是(shi)(shi)排在重(zhong)(zhong)(zhong)要(yao)的(de)(de)(de)位置的(de)(de)(de)，也是(shi)(shi)植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)理(li)(li)學(xue)必須(xu)要(yao)研(yan)(yan)究(jiu)的(de)(de)(de)一項植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)理(li)(li)活動(dong)，因為(wei)(wei)光(guang)合(he)(he)(he)作(zuo)(zuo)用是(shi)(shi)植(zhi)(zhi)(zhi)物(wu)(wu)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)存的(de)(de)(de)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)命(ming)活動(dong)中特別(bie)重(zhong)(zhong)(zhong)要(yao)的(de)(de)(de)一個(ge)，對植(zhi)(zhi)(zhi)物(wu)(wu)的(de)(de)(de)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)長有(you)非常(chang)大(da)的(de)(de)(de)影響和(he)關系，也是(shi)(shi)大(da)氣環(huan)境空氣循環(huan)的(de)(de)(de)重(zhong)(zhong)(zhong)要(yao)組成部(bu)分(fen)，所(suo)以對光(guang)合(he)(he)(he)作(zuo)(zuo)用的(de)(de)(de)測(ce)定和(he)研(yan)(yan)究(jiu)是(shi)(shi)有(you)非常(chang)重(zhong)(zhong)(zhong)要(yao)的(de)(de)(de)意義的(de)(de)(de)。

　　便攜式光(guang)合(he)作用(yong)(yong)測定儀(yi)(JD-GH30)是競道光(guang)電廠家生產的一款針(zhen)對植物(wu)光(guang)合(he)作用(yong)(yong)的條件變化(hua)和(he)光(guang)合(he)作用(yong)(yong)的結果(guo)變化(hua)進行(xing)數據采集和(he)記錄的重(zhong)要儀(yi)器(qi)，可以測定氣(qi)體CO2濃(nong)度(du)、空(kong)氣(qi)溫(wen)濕(shi)度(du)，葉(xie)片溫(wen)度(du)，光(guang)合(he)有效輻射，細胞(bao)間(jian)(jian)CO2濃(nong)度(du)，氣(qi)體流量(liang)等(deng)要素，并計(ji)算出(chu)植物(wu)的光(guang)合(he)速(su)率、蒸騰速(su)率、氣(qi)孔導度(du)、胞(bao)間(jian)(jian)二氧化(hua)碳濃(nong)度(du)和(he)水分利(li)用(yong)(yong)率等(deng)光(guang)合(he)作用(yong)(yong)指標，也可以單獨作為二氧化(hua)碳記錄儀(yi)使用(yong)(yong)。

　　光(guang)(guang)合作用是生化(hua)反應，過程中每個植(zhi)物(wu)(wu)(wu)都會與光(guang)(guang)反應，把周圍空(kong)氣的(de)水、二氧化(hua)碳變為利于(yu)植(zhi)物(wu)(wu)(wu)生長 的(de)有(you)機物(wu)(wu)(wu)，再由植(zhi)物(wu)(wu)(wu)釋(shi)放出氧氣， 由此可以總結出，光(guang)(guang)是植(zhi)物(wu)(wu)(wu)進(jin)行(xing)光(guang)(guang)合作用的(de)主要(yao)(yao)媒介，光(guang)(guang)照(zhao)強度是決定光(guang)(guang)大小的(de)重要(yao)(yao)因素。所 以，光(guang)(guang)照(zhao)強度會直接影響向園藝植(zhi)物(wu)(wu)(wu)光(guang)(guang)合作用的(de)進(jin)行(xing)。

　　便攜式光(guang)合作(zuo)用(yong)測定(ding)儀采用(yong)windows操(cao)作(zuo)系統，觸摸顯示屏(ping)，同時測定(ding)光(guang)合速(su)率、蒸騰(teng)速(su)率、胞間二氧(yang)化碳(tan)濃度、氣(qi)(qi)孔導度和(he)水分(fen)(fen)利用(yong)效率，以及二氧(yang)化碳(tan)濃度、相對濕度、光(guang)合有效輻射和(he)空(kong)氣(qi)(qi)溫度、葉片溫度、大氣(qi)(qi)壓力等指(zhi)標，試驗完畢后(hou)可將(jiang)多組數據同時分(fen)(fen)析，生(sheng)成放不同顏色的(de)曲線圖，方(fang)便進行實驗數據對比。廣泛應用(yong)農學(xue)(xue)、林(lin)學(xue)(xue)、生(sheng)態學(xue)(xue)、農業氣(qi)(qi)象學(xue)(xue)等學(xue)(xue)科的(de)科學(xue)(xue)研究(jiu)。

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