Some indicators of the effect of global warming on olive tree flowering in south Tunisia
Olive tree(Olea europaea L.)is the major crop in Tunisia and cultivated from the south to the north of the country.Flowering is considered the most important and delicate phase,and it reflect correctly the environmental extrinsic and tree intrinsic conditions.In the present work we studied the impact of global warming on the olive tree in the south-east Tunisia,where nowadays the future of this crop is suspect.This study focused on the floral phenological observations during 18 years(1992-2009)on three Tunisian olive cultivars('Zalmati','Chemlali',and 'Zarrazi')in an arid area(Zarzis,33°36'N; 11°01'E).The annual rainfall during the last decade has shown a trend for reduction while temperature,especially during winter,has shown a trend for increase.The results have shown that this crucial stage of the reproductive stage has varied along the time,depending on the meteorological conditions.Taking into account both phenological and meteorological databases it has been observed that global warming has impacted the flowering period.Along the years,an advancement in the onset of flowering has been observed,especially in 2000 and 2004 and it is anticipated that this trend will continue with the expected climatic projections.Flowering advancement exposes the olive fruits to olive-tree fly(Bactocera oleae)attack which can cause severe economic losses.This condition would necessitate more intensive use of chemical treatments.
MounirAbichou Herminia Garcia-Mozo Ali Ben Dhiab Monji Msallem Eugenio Domínguez-Vilches Carmen Galan
Olive Tree Institute,BP 208,1082 Tunis,Tunisia Departamento de Botánica,Ecología y Fisiología Vegetal,Edificio Celestino Mutis(C4),Campus de Rabana
国际会议
The 11th International Conference on Development of Drylands(第十一届国际干旱区大会)
北京
英文
278-283
2013-03-18（万方平台首次上网日期，不代表论文的发表时间）