植(zhi)物生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)的基點溫度和極限溫度根據(ju)植(zhi)物學(xue)原理，植(zhi)物必須在一定的環境條件(jian)下才能正常生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)。其中環境溫度與植(zhi)物生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)發(fa)育關系密切。每(mei)種植(zhi)物都(dou)對應著一個最(zui)(zui)(zui)低生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)溫度、較(jiao)高生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)溫度和適合生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)溫度。溫室大棚當環境溫度低于(yu)植(zhi)物的最(zui)(zui)(zui)低生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)溫度或高于(yu)植(zhi)物的最(zui)(zui)(zui)高生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)溫度時，植(zhi)物就會(hui)停止生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)；而當環境溫度處于(yu)最(zui)(zui)(zui)適合的生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)溫度時，植(zhi)物生(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)發(fa)育最(zui)(zui)(zui)理想(xiang)。
這(zhe)種(zhong)特(te)性的(de)三個(ge)溫(wen)度(du)(du)(du)(du)(du)稱為(wei)植物(wu)生(sheng)(sheng)(sheng)長(chang)(chang)(chang)的(de)三基點(dian)溫(wen)度(du)(du)(du)(du)(du)。除了三基點(dian)溫(wen)度(du)(du)(du)(du)(du)外，每種(zhong)植物(wu)還有高(gao)、低兩(liang)個(ge)生(sheng)(sheng)(sheng)命(ming)溫(wen)度(du)(du)(du)(du)(du)指(zhi)(zhi)標(biao)。當(dang)環(huan)境溫(wen)度(du)(du)(du)(du)(du)在(zai)最(zui)(zui)(zui)低生(sheng)(sheng)(sheng)長(chang)(chang)(chang)溫(wen)度(du)(du)(du)(du)(du)和(he)最(zui)(zui)(zui)高(gao)生(sheng)(sheng)(sheng)長(chang)(chang)(chang)溫(wen)度(du)(du)(du)(du)(du)范(fan)圍(wei)以外，但在(zai)較(jiao)高(gao)和(he)較(jiao)低兩(liang)個(ge)生(sheng)(sheng)(sheng)命(ming)極限溫(wen)度(du)(du)(du)(du)(du)指(zhi)(zhi)標(biao)范(fan)圍(wei)之內時，雖然植物(wu)會停止生(sheng)(sheng)(sheng)長(chang)(chang)(chang)但不會死亡；溫(wen)室(shi)大(da)棚(peng)一(yi)旦溫(wen)度(du)(du)(du)(du)(du)恢(hui)復到最(zui)(zui)(zui)低生(sheng)(sheng)(sheng)長(chang)(chang)(chang)溫(wen)度(du)(du)(du)(du)(du)和(he)最(zui)(zui)(zui)高(gao)生(sheng)(sheng)(sheng)長(chang)(chang)(chang)溫(wen)度(du)(du)(du)(du)(du)范(fan)圍(wei)內時，植物(wu)還能繼續生(sheng)(sheng)(sheng)長(chang)(chang)(chang)。但一(yi)旦環(huan)境溫(wen)度(du)(du)(du)(du)(du)超過最(zui)(zui)(zui)高(gao)和(he)最(zui)(zui)(zui)低兩(liang)個(ge)生(sheng)(sheng)(sheng)命(ming)溫(wen)度(du)(du)(du)(du)(du)指(zhi)(zhi)標(biao)范(fan)圍(wei)，則植物(wu)的(de)生(sheng)(sheng)(sheng)命(ming)系統(tong)將遭到破壞，植物(wu)將會死亡。即使(shi)溫(wen)度(du)(du)(du)(du)(du)再恢(hui)復到生(sheng)(sheng)(sheng)長(chang)(chang)(chang)溫(wen)度(du)(du)(du)(du)(du)范(fan)圍(wei)內，植物(wu)也無法再恢(hui)復生(sheng)(sheng)(sheng)長(chang)(chang)(chang)發育。
