Decline of vegetative growth in Coffea arabica L in relation to leaf temperature, water potential and stomatal conductance

被引:45
作者
Barros, RS
Mota, JWDE
DaMatta, FM
Maestri, M
机构
[1] Departamento de Biologia Vegetal, Univ. Federal de Viçosa, 36571-000 Viçosa, MG
关键词
coffee growth; solar radiation; leaf and air temperatures; stomatal conductance; vapour pressure deficit; water potential;
D O I
10.1016/S0378-4290(97)00045-2
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The decline of vegetative growth of Arabica coffee trees in Vicosa (20 degrees 45' S, 650 m altitude), Brazil, occurring from mid-March through late May, was observed in both irrigated and non-irrigated plants and did not show a direct relation with leaf water potential. Declining growth coincided with lowering temperatures, and particularly with increasing daily periods with low temperatures. Stomatal conductances in the morning (0800-0900 h) were relatively high until mid-March and decreased gradually in parallel with declining growth rates. During the quiescent growth phase in the cool season, starting from late May, stomata were closed for most of the diurnal period. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:65 / 72
页数:8
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