張育森2006-07-262018-06-292006-07-262018-06-292001http://ntur.lib.ntu.edu.tw//handle/246246/18213為了瞭解不同月份CWSI 之上下 限與CWSI 可否取代傳統測量植物水 分狀況的方法，本試驗將栽植於花箱 中之地毯草（ Axonopus compressus （ Swart ） Beauv. ） 與假儉草 （ Eremochloa ophiuroides（Munro） Hack.）置於塑膠布溫室及人工光照氣 候室中測量CWSI 之上下限、CWSI 與葉片水勢、土壤水勢的比較。結果 顯示，上下限會依不同的作物、時期 與地區而改變。CWSI 與葉片水勢、土 壤水勢有其負相關性存在，而蒸散速 率較葉片水勢與土壤水勢更能評估植 株水分逆境的恢復程度。此外，CWSI 在乾旱時其靈敏度高於濕潤狀態，因 此CWSI 較適合表示植物處於水分逆 境時之水分狀況。以CWSI 作為地毯 草灌溉指標時，CWSI 值為0.63。Tropical carpetgrass （ Axonopus compressus（ Swart ） Beauv. ） and centipedegrass（ Eremochloa ophiuroides （Munro）Hack.）were placed in the plastic tunnel and phytotron to investigate the lower and upper baselines of crop water stress index (CWSI) in different months and evaluate the ability of using CWSI to replace the traditional methods in measuring plant water status. The results shown that the lower and upper baselines of CWSI measured in July, August, and September were different in both tropical carpetgrass and centipedegrass, therefore the lower and upper baselines of CWSI needed to consider plant 2 species, growth seasons, and culture condition. CWSI values, leaf water potential （ LWP ） and soil water potential （SWP） values of tropical carpetgrass and centipedegrass in the plastic tunnel and phytotron were measured. The results indicate that the CWSI was linearly correlated to LWP and SWP. In addition, transpiration rate seem to be a more reliable index than LWP and SWP to diagnosing plant water stress. CWSI was more sensitive in drought stage than well-watered stage. When using CWSI as an indicator of irregation of tropical carpetgrass, the value was 0.63.application/pdf36547 bytesapplication/pdfzh-TW國立臺灣大學園藝學系暨研究所地毯草假儉草作物水分逆境指數（CWSI）土壤水勢葉片水勢蒸散速率Tropical CarpetgrassCentipedegrassCrop Water Stress Index (CWSI)Soil Water PotentialLeaf Water PotentialTranspiration Ratereporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/18213/1/892313B002194.pdf