Canopy temperature (CT) of vine plots subjected to drying cycles, and of well-watered control plots was measured with the aid of an infra-red thermometer in a full-bearing Colombar vineyard together with measurements of leaf water potential (LWP) and stomata) resistance (Rs). A decrease in transpiration rate due to water stress caused plant temperature to rise above that of the non-stressed control. A maximum temperature difference of 3,2°C was obtained. The infra-red thermometer proved itself accurate and facilitated rapid temperature determinations while measurements of CT integrated temperatures of individual leaves. Canopy temperature was significantly and linearly correlated with soil water content (SWC). The study indicated that the onset of vine water stress occurred at plant available water contents of 30% - 50%, coinciding with a CT increase of 1,l6°C - 1,62°C above that of the control.
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出版者
South African Journal of Enology and Viticulture
语言
英语
格式
application/pdf
许可
Copyright (c) 2017 South African Society for Enology and Viticulture
类型
Journal Article; Journal Part; Journal Article; Journal Part
来源
South African Journal of Enology and Viticulture; Vol. 7 No. 2 (1986); 53-60, 2224-7904, 0253-939X
2025-10-30
2026-02-03
Dublin Core
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