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Seasonal fluctuations in Vitis vinifera root respiration in the field
Author(s) -
Franck Nicolás,
Morales Joaquín P.,
ArancibiaAvendaño David,
García de Cortázar Víctor,
PerezQuezada Jorge F.,
ZuritaSilva Andrés,
Pastenes Claudio
Publication year - 2011
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2011.03860.x
Subject(s) - vineyard , respiration , vine , girdling , annual growth cycle of grapevines , soil respiration , agronomy , dormancy , q10 , horticulture , environmental science , biomass (ecology) , biology , botany , shoot , germination
Summary• We studied the seasonal fluctuation of soil respiration ( R S ), and its root‐dependent ( R R ) and basal ( R B ) components, in a Vitis vinifera (Chardonnay) vineyard. • The R S components were estimated through independent field methods ( y ‐intercept and trenching) and modeled on the basis of a Q 10 response to soil temperature, and fine and coarse root respiration coefficients. The effect of assimilate availability on R R was assessed through a trunk girdling treatment. • The apparent Q 10 for R R was twice that of R B (3.5 vs 1.6) and increased linearly with increasing vine root biomass. The fastest R R of fine roots was during rapid fruit growth and the fastest R R of coarse roots was immediately following fruit development. R S was estimated at 32.6 kg ha −1 d −1 (69% as a result of R R ) for the hottest month and at 7.6 kg ha −1 d −1 (18% as a result of R R ) during winter dormancy. Annual R S was low compared with other natural and cultivated ecosystems: 5.4 Mg ha −1 (46% as a result of R R ). • Our estimates of annual vineyard R S are the first for any horticultural crop and suggest that the assumption that they are similar to those of annual crops or forest trees might lead to an overestimation.