Does a greater number of branches improve initial fruit production in camu-camu? A test under different types of plantation and cropping management

Abstract

Introduction. The branches of camu-camu should start sprouting from its base, in order to be positively related to a fruit yield increase. The objective of this study was to consider how plant growth and fruit yield varied according to the plantation type and crop management system. Materials and methods. The growth of the crown and fruit production under different types of plantations originating from cuttings, grafts or seedlings, and seed plantation management: fertilization, pruning and planting different densities, were compared. Results and discussion. Cutting plants formed more branches than those originating from grafting, regardless of the origin of the grafted scion. In seed plantations, zero fertilization and pruning had no effect on the formation of basal branches, but pruning delayed fruit production. Plantations with three plants per hole produced significantly greater numbers of basal branches, but further evaluation is necessary to analyze the effect of this on fruit production. Conclusion. Cutting plantations are technically more desirable than grafting ones because camu-camu trees have better branching from the base. In seed plantations, the selection of plants for their abundant branching from the base is technically feasible. In addition, planting three plants per hole seems promising for improving branching. © Cirad/EDP Sciences 2015.