Allometric relationships to estimate seasonal above-ground vegetative and reproductive biomass of Vitis vinifera L.

ABSTRACT: A procedure is described for obtaining allometric regression equations to estimate non-destructively and in a cost-effective manner the current year's above-ground vegetative and reproductive biomass of Vitis vinifera L. Merlot' throughout the growing season. Significant relationships were obtained over a 3-year period (1998-2000) between the dimensions of an individual shoot per vine (i.e. diameter and length) and dry weights of its primary stem, primary leaves and lateral growth. The dry mass of a grape was best estimated from measurements of the basal diameter of the bunch peduncle. Introducing cumulative degree-days as an additional explanatory variable in the equations allowed them to be used irrespective of year and growth stage. Multi-year regressions were used to quantify in detail

SUBMITTER: Castelan-Estrada M 

PROVIDER: S-EPMC4233873 | biostudies-literature | 2002 Apr

REPOSITORIES: biostudies-literature