Interrow distance and height of foliar hedge. 1. Incidence on the interception of solar radiation and photosynthesis in vineyards | Distance interligne et hauteur de la haie foliaire. 1. Incidence sur le potentiel d'interception lumineuse et la photosynthese de la vigne
2003
Zufferey, V. | Murisier, F. (Station federale de recherches en production vegetale de Changins (RAC), Pully (Switzerland). Centre viticole du Caudoz)
Interception of solar radiation and photosynthesis by the canopy surface has been monitored from 1996 to 1998 at the Caudoz (Pully) experimental field of the Swiss Federal Research Station of Changins, for different interrow distances and heights of the foliar hedge. Raising the height of the vine hedgerow as well as decreasing the distance between rows resulted in an increase in the surface area of canopy exposed to direct sunlight. However, the lower leaves in adjacent rows suffered greater shade. The impact of shadow on photosynthetic activity of ageing basal leaves is weak towards the end of fruit ripening period. In the absence of water stress and with a saturated light, the maximum photosynthetic capacity of foliage was identical, independent of row spacing and hedgerow height.
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