呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)能(neng)(neng)為(wei)(wei)生(sheng)(sheng)(sheng)物(wu)(wu)(wu)體(ti)的生(sheng)(sheng)(sheng)命活動(dong)提供能(neng)(neng)量。呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)釋(shi)(shi)(shi)(shi)放(fang)出來(lai)的能(neng)(neng)量，一部(bu)分轉變為(wei)(wei)熱(re)能(neng)(neng)而散(san)失，另一部(bu)分儲(chu)(chu)存(cun)在(zai)ATP中。當ATP在(zai)酶的作(zuo)(zuo)用(yong)(yong)下分解時，就(jiu)(jiu)把儲(chu)(chu)存(cun)的能(neng)(neng)量釋(shi)(shi)(shi)(shi)放(fang)出來(lai)，用(yong)(yong)于生(sheng)(sheng)(sheng)物(wu)(wu)(wu)體(ti)的各項生(sheng)(sheng)(sheng)命活動(dong)，如細胞的分裂，植(zhi)(zhi)(zhi)物(wu)(wu)(wu)體(ti)的生(sheng)(sheng)(sheng)長，礦質元素的吸(xi)(xi)(xi)(xi)收(shou)，肌肉(rou)的收(shou)縮，神經(jing)沖動(dong)的傳導(dao)等(deng)等(deng)。為(wei)(wei)什么說植(zhi)(zhi)(zhi)物(wu)(wu)(wu)白(bai)天(tian)(tian)(tian)放(fang)氧(yang)(yang)(yang)(yang)氣(qi)(qi)，晚(wan)上(shang)放(fang)二氧(yang)(yang)(yang)(yang)化碳(tan)？其實，植(zhi)(zhi)(zhi)物(wu)(wu)(wu)白(bai)天(tian)(tian)(tian)表(biao)現為(wei)(wei)吸(xi)(xi)(xi)(xi)收(shou)二氧(yang)(yang)(yang)(yang)化碳(tan)，釋(shi)(shi)(shi)(shi)放(fang)氧(yang)(yang)(yang)(yang)氣(qi)(qi)；晚(wan)上(shang)則表(biao)現為(wei)(wei)吸(xi)(xi)(xi)(xi)收(shou)氧(yang)(yang)(yang)(yang)，釋(shi)(shi)(shi)(shi)放(fang)二氧(yang)(yang)(yang)(yang)化碳(tan)。在(zai)白(bai)天(tian)(tian)(tian)，植(zhi)(zhi)(zhi)物(wu)(wu)(wu)主要進(jin)行(xing)光(guang)(guang)(guang)合(he)(he)作(zuo)(zuo)用(yong)(yong)、呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)、蒸騰作(zuo)(zuo)用(yong)(yong)等(deng)。由(you)于呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)和光(guang)(guang)(guang)合(he)(he)作(zuo)(zuo)用(yong)(yong)是相反的兩個過程，在(zai)白(bai)天(tian)(tian)(tian)光(guang)(guang)(guang)合(he)(he)作(zuo)(zuo)用(yong)(yong)遠強于呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)，呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)產生(sheng)(sheng)(sheng)的二氧(yang)(yang)(yang)(yang)化碳(tan)在(zai)植(zhi)(zhi)(zhi)物(wu)(wu)(wu)體(ti)內就(jiu)(jiu)被植(zhi)(zhi)(zhi)物(wu)(wu)(wu)進(jin)行(xing)光(guang)(guang)(guang)合(he)(he)作(zuo)(zuo)用(yong)(yong)給消耗(hao)掉了，而呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)消耗(hao)的氧(yang)(yang)(yang)(yang)，光(guang)(guang)(guang)合(he)(he)作(zuo)(zuo)用(yong)(yong)能(neng)(neng)大量產生(sheng)(sheng)(sheng)，所以植(zhi)(zhi)(zhi)物(wu)(wu)(wu)的呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)表(biao)現不(bu)顯著。在(zai)夜間(jian)，植(zhi)(zhi)(zhi)物(wu)(wu)(wu)主要進(jin)行(xing)呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)，不(bu)進(jin)行(xing)光(guang)(guang)(guang)合(he)(he)作(zuo)(zuo)用(yong)(yong)。呼(hu)(hu)(hu)(hu)(hu)吸(xi)(xi)(xi)(xi)作(zuo)(zuo)用(yong)(yong)吸(xi)(xi)(xi)(xi)收(shou)氧(yang)(yang)(yang)(yang)氣(qi)(qi)，釋(shi)(shi)(shi)(shi)放(fang)二氧(yang)(yang)(yang)(yang)化碳(tan)。

　　競道植(zhi)(zhi)物(wu)呼(hu)吸測(ce)定(ding)儀(yi)用(yong)于測(ce)量(liang)植(zhi)(zhi)物(wu)的(de)呼(hu)吸速率及(ji)光(guang)合(he)速率的(de)測(ce)量(liang)，適用(yong)于植(zhi)(zhi)物(wu)學(xue)及(ji)生(sheng)態學(xue)方面科(ke)研及(ji)教學(xue)工作(zuo)。同時(shi)在生(sheng)物(wu)、農學(xue)、園(yuan)藝、林業、昆蟲、微(wei)生(sheng)物(wu)、動(dong)物(wu)等許多專業的(de)實(shi)驗中(zhong)有廣泛(fan)的(de)開發(fa)和利用(yong)前景。選(xuan)用(yong)先進(jin)的(de)單片機對測(ce)定(ding)過程中(zhong)各路變化(hua)的(de)信號進(jin)行自動(dong)采集和處理，配置(zhi)3.5"TFT真彩液晶屏彩色顯示(shi)器，可實(shi)現多信息的(de)菜單式(shi)顯示(shi)和光(guang)標引(yin)導下(xia)的(de)簡便(bian)(bian)操(cao)作(zuo)；采用(yong)16G內存，可進(jin)行更多的(de)數據存儲，野外測(ce)量(liang)數據存儲量(liang)為幾百萬(wan)組。該(gai)儀(yi)器體積小重量(liang)輕，可隨身攜帶，單人操(cao)作(zuo)，任意移(yi)動(dong)，氣路和電路連(lian)接(jie)明確，操(cao)作(zuo)方式(shi)及(ji)測(ce)定(ding)，測(ce)定(ding)時(shi)裝卸葉片十分方便(bian)(bian)。

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