草坪植物之水分生理與灌溉指標之研究(二)
Date Issued
2001
Date
2001
Author(s)
DOI
892313B002194
Abstract
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.
Subjects
Tropical Carpetgrass
Centipedegrass
Crop Water
Stress Index (CWSI)
Stress Index (CWSI)
Soil Water Potential
Leaf Water Potential
Transpiration Rate
Publisher
臺北市：國立臺灣大學園藝學系暨研究所
Type
report
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