Abstract
Growth of four sugarcane ( Saccharum officinarum L.) clones, as affected by two air and two root temperatures during a 28‐day period, is described. With all treatments dry‐matter production was found to be closely related to water consumption (r = 0.98), increase in height of the top visible dewlap (r = 0.95), and spindle growth rate (r = 0.91). The spindle, because of its rapid and constant growth rate, was found to be more reliable than the dewlap for obtaining short‐term (24‐hr) measurements of dry‐weight production. Leaf growth was affected more by low root temperature than by low air temperature. Low root temperatures reduced water consumption per unit leaf area. There was no effect of temperature on the transpiration ratio (water consumed per unit dry weight), but the increase in fresh weight/increase in dry‐weight ratio was about four times less under cool root conditions than under warm root conditions.
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Claims 8
Claim · model-written summary
Dry matter production was closely related to water consumption, r = 0.98.
Not reportedOrgan / stageTreatmentComparatorSettingDirection
Verbatim
e0“dry‐matter production was found to be closely related to water consumption (r = 0.98)”
t0“Sugarcane”
Claim · model-written summary
Dry matter production was closely related to top visible dewlap height increase, r = 0.95.
Not reportedDirection
Verbatim
e0“dry‐matter production was found to be closely related to water consumption (r = 0.98), increase in height of the top visible dewlap (r = 0.95)”
t0“Sugarcane”
Claim · model-written summary
Dry matter production was closely related to spindle growth rate, r = 0.91.
Not reportedDirection
Verbatim
e0“spindle growth rate (r = 0.91)”
e1“dry‐matter production was found to be closely related”
t0“Sugarcane”
Claim · model-written summary
Spindle growth was more reliable than dewlap height for short-term dry-weight production measurements.
Verbatim
e0“The spindle, because of its rapid and constant growth rate, was found to be more reliable than the dewlap for obtaining short‐term (24‐hr) measurements of dry‐weight production”
t0“Sugarcane”
Claim · model-written summary
Low root temperature affected leaf growth more than low air temperature.
Verbatim
e0“Leaf growth was affected more by low root temperature than by low air temperature”
t0“Sugarcane”
Claim · model-written summary
Low root temperature reduced water consumption per unit leaf area.
- Taxon
- Sugarcanet0
- Treatment
- Low root temperaturese0
- Outcome
- water consumption per unit leaf areae0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Low root temperatures reduced water consumption per unit leaf area”
t0“Sugarcane”
Claim · model-written summary
Temperature had no effect on transpiration ratio.
Not reportedComparator
Verbatim
e0“There was no effect of temperature on the transpiration ratio (water consumed per unit dry weight)”
t0“Sugarcane”
Claim · model-written summary
Fresh weight to dry-weight increase ratio was about four times lower under cool versus warm root conditions.
Verbatim
e0“the increase in fresh weight/increase in dry‐weight ratio was about four times less under cool root conditions than under warm root conditions”
t0“Sugarcane”