Using whole-plant chambers to estimate carbon balance in field-grown grapevines
Abstract
Carbon balance has currently gained a special interest in viticulture. Determining vine carbon footprint would allow knowing the contribution of grapevine as carbon sequestration to reduce the effects of global change. There are only a few studies that investigated the effects of different water supplies on whole-plant gas exchange and vine carbon balance. This is due to the difficulty in measuring whole-canopy carbon fixation, especially in field conditions, considering different leaf positions. Whole-plant chambers are very interesting tools to estimate these balances, which help to overcome difficulties and constraints from previous methods. An experiment was carried out during 2014 to determine the effect of different levels of water availability on whole-plant gas exchange and carbon balance for the cultivar Grenache. For this purpose, two irrigation regimes were established, moderate water stress and rainfed. Carbon fixation was measured using whole-plant chambers at different plant phenological stages. Simultaneously, leaf gas exchange at different canopy positions were carried out to compare the measurements with whole-plant chambers. Results showed that these chambers were able to estimate values for net carbon assimilation along the vine phenological cycle.
Issue: GiESCO 2015
Type: Extended abstract
Authors
1 Research Group on Plant Biology. Balearic Islands University
2 Centra Valldemossa Km 7,5. 07122. Palma de Mallorca. Spain
Contact the author*
Keywords
carbon balance, water stress, whole plant chamber