呼(hu)(hu)(hu)吸(xi)(xi)(xi)能為(wei)生(sheng)物(wu)(wu)(wu)體(ti)的(de)生(sheng)命活(huo)動提供(gong)能量。呼(hu)(hu)(hu)吸(xi)(xi)(xi)釋放(fang)出來的(de)能量，一部分(fen)轉變為(wei)熱(re)能而散失(shi)，另(ling)一部分(fen)儲存在(zai)ATP中。當(dang)ATP在(zai)酶(mei)的(de)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)下(xia)分(fen)解時，就把(ba)儲存的(de)能量釋放(fang)出來，用(yong)(yong)(yong)(yong)于(yu)生(sheng)物(wu)(wu)(wu)體(ti)的(de)各項生(sheng)命活(huo)動，如細胞的(de)分(fen)裂，植物(wu)(wu)(wu)體(ti)的(de)生(sheng)長，礦質元素的(de)吸(xi)(xi)(xi)收(shou)(shou)(shou)，肌肉的(de)收(shou)(shou)(shou)縮，神經(jing)沖(chong)動的(de)傳導等(deng)(deng)等(deng)(deng)。為(wei)什么說(shuo)植物(wu)(wu)(wu)白天(tian)放(fang)氧(yang)氣(qi)(qi)，晚上放(fang)二氧(yang)化(hua)(hua)碳？其實，植物(wu)(wu)(wu)白天(tian)表現為(wei)吸(xi)(xi)(xi)收(shou)(shou)(shou)二氧(yang)化(hua)(hua)碳，釋放(fang)氧(yang)氣(qi)(qi)；晚上則表現為(wei)吸(xi)(xi)(xi)收(shou)(shou)(shou)氧(yang)，釋放(fang)二氧(yang)化(hua)(hua)碳。在(zai)白天(tian)，植物(wu)(wu)(wu)主(zhu)要進行(xing)(xing)光合(he)(he)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)、呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)、蒸騰作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)等(deng)(deng)。由于(yu)呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)和(he)光合(he)(he)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)是相反的(de)兩(liang)個過程，在(zai)白天(tian)光合(he)(he)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)遠強于(yu)呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)，呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)產(chan)生(sheng)的(de)二氧(yang)化(hua)(hua)碳在(zai)植物(wu)(wu)(wu)體(ti)內(nei)就被植物(wu)(wu)(wu)進行(xing)(xing)光合(he)(he)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)給(gei)消耗掉了，而呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)消耗的(de)氧(yang)，光合(he)(he)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)能大量產(chan)生(sheng)，所以植物(wu)(wu)(wu)的(de)呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)表現不(bu)顯著(zhu)。在(zai)夜(ye)間，植物(wu)(wu)(wu)主(zhu)要進行(xing)(xing)呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)，不(bu)進行(xing)(xing)光合(he)(he)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)。呼(hu)(hu)(hu)吸(xi)(xi)(xi)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)(yong)吸(xi)(xi)(xi)收(shou)(shou)(shou)氧(yang)氣(qi)(qi)，釋放(fang)二氧(yang)化(hua)(hua)碳。

　　競道(dao)植(zhi)物(wu)(wu)呼吸測(ce)(ce)定(ding)儀用于測(ce)(ce)量(liang)(liang)植(zhi)物(wu)(wu)的(de)(de)呼吸速(su)率及光(guang)合速(su)率的(de)(de)測(ce)(ce)量(liang)(liang)，適用于植(zhi)物(wu)(wu)學(xue)及生態(tai)學(xue)方(fang)面(mian)科研及教學(xue)工作。同時在生物(wu)(wu)、農學(xue)、園藝、林業、昆蟲(chong)、微生物(wu)(wu)、動(dong)物(wu)(wu)等許多專業的(de)(de)實驗中有廣泛的(de)(de)開發和利用前景。選用先(xian)進(jin)的(de)(de)單片機對(dui)測(ce)(ce)定(ding)過程中各路(lu)變化的(de)(de)信(xin)號(hao)進(jin)行(xing)自動(dong)采集和處理，配置(zhi)3.5"TFT真彩(cai)液晶(jing)屏彩(cai)色顯(xian)(xian)示器，可(ke)實現多信(xin)息的(de)(de)菜單式顯(xian)(xian)示和光(guang)標(biao)引導下(xia)的(de)(de)簡便操(cao)作；采用16G內存，可(ke)進(jin)行(xing)更多的(de)(de)數據存儲，野外(wai)測(ce)(ce)量(liang)(liang)數據存儲量(liang)(liang)為幾(ji)百(bai)萬組(zu)。該儀器體積小重(zhong)量(liang)(liang)輕，可(ke)隨身攜帶(dai)，單人操(cao)作，任意移(yi)動(dong)，氣路(lu)和電路(lu)連接明(ming)確(que)，操(cao)作方(fang)式及測(ce)(ce)定(ding)，測(ce)(ce)定(ding)時裝卸葉片十分方(fang)便。

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