Kari Tuomela, Markku Kanninen. (1995). Effects of vapour pressure deficit and soil water content on leaf water potential between selected provenances of Eucalyptus microtheca in an irrigated plantation, eastern Kenya. Silva Fennica vol. 29 no. 3 article id 5558. https://doi.org/10.14214/sf.a9209

Keywords: Kenya; water potential; drought adaptation; leaf water potential; provenance selection; Eucalyptus microtheca

Abstract | View details | Full text in PDF | Author Info

The aim of the study was to compare the behaviour of three selected provenances of Eucalyptus microtheca F. Muell. that were likely to respond differently to drought. For this purpose, we studied the effects of vapour pressure deficit and soil water content on leaf water potential in an irrigated plantation in Bura, eastern Kenya.

An international provenance trial of Eucalyptus microtheca, established as a part of Finnida-supported Bura Forestry Research Project in eastern Kenya in 1984 was used as a plant material in the study. The eastern provenance showed generally the lowest leaf water potential on a daily basis. Statistically significant differences in the daily leaf water potential fluctuations were detected. The eastern provenance exhibited the greatest and the northern one the smallest values. The minimum daily leaf water potential of the provenances responded well to changes in gravimetric soil water content, the western provenance being the most sensitive one. The relationship of the observed results and annual rainfall distribution in the geographic regions of the studied provenances is discussed.

Tuomela, E-mail: kt@mm.unknown
Kanninen, E-mail: mk@mm.unknown

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