Claim · model-written summary
Low soil water availability decreased stomatal conductance of olive trees to 69.3 mmol/m2.s, versus 98.5 mmol/m2.s for irrigated trees.
Olea europaeaVerbatim
t0“olive trees (Olea europaea L. cv. Chemlali Sfax)”
e7“low soil water availability also affected (negatively) the net photosynthetic rate in rain-fed orchards (10.3 µmol/m2.s for irrigated trees v. 5.3 µmol/m2.s in rain-fed trees on sandy soil) and stomatal conductance (98.5 mmol/m2.s v. 69.3 mmol/m2.s)”
Title
B. Ben Rouina; A. Trigui; R. d’Andria; et al. Australian Journal of Experimental Agriculture 2007. doi:10.1071/ea05206
Other claims from this paper (12)
- Observation Irrigated olive trees kept predawn leaf water potential above –1.52 MPa.
- Intervention effect Predawn leaf water potential of rain-fed olive trees on sandy soil decreased to about –3.2 MPa.
- Intervention effect Predawn leaf water potential of rain-fed olive trees on sandy-loam clay soil decreased to about –3.6 MPa.
- Intervention effect Midday minimal leaf water potential of rain-fed olive trees on sandy soil decreased to –4.15 MPa.
- Intervention effect Midday minimal leaf water potential of rain-fed olive trees on sandy-loam clay soil decreased to –4.71 MPa.
- Observation Midday minimal leaf water potential of irrigated olive trees was –1.95 MPa.
- Intervention effect Relative water content was lower in rain-fed trees and trees under severe drought than in irrigated trees, at 54 and 43.6% versus 80%.
- Observation When relative water content fell below 50% in August, progressive canopy desiccation and death of terminal shoots were observed on the sandy-loam clay soil.
- Intervention effect Low soil water availability decreased the net photosynthetic rate of rain-fed olive trees on sandy soil to 5.3 µmol/m2.s, versus 10.3 µmol/m2.s for irrigated trees.
- Intervention effect Water use efficiency of rain-fed olive trees increased by more than 50% compared with irrigated trees (7.6 versus 4.7 µmol CO2/mmol H2O).
- Intervention effect The authors conclude that olive trees respond to drought with significant changes in their physiological and biological mechanisms.
- Association The authors suggest that marginal soils can restrict olive growth and lower yields.
Oryza sativa
Lolium multiflorum
Vitis
Amaranthus hybridus
Lolium arundinaceum.jpg?width=60){kind=small}
Poa pratensis