Crescimento de porta-enxertos cítricos em sistema hidropônico

Abstract

The search for technologies which provide the production of fruit-bearing seedlings aiming high economic return and with less impact is growing more and more. Hydroponics appears as a technique which enables the obtaining of high quality seedlings with the rational use of water and fertilizers and les incidence of plant pathogens. In this study, evaluating the growth of citrus rootstocks in hydroponical system till the taking root of the grafts was intended. In the former part of this work, the germination of the rootstocks -lemon tree ´Cravo´ and the tangerine tree ´Cleopatra" presented higher germination rates and GVI in relation to citromelo tree ´Swingle´. In the latter part, the growth and the taking root of the grafts on the rootstocks under hydroponical conditions. The growth of lemon tree ´Cravo´ and of tangerine tree ´Cleopatra´ occurred simultaneously, these two being apt to transplanting at 199 DAS and reached the grafting point at 332 DAS while citrumelo tree ´Swingle´ reaching the transplanting height at 300 DAS and grafting point at 367 DAS. 100% of the taking root of the grafts on citrumelo tree ´Swingle´ and on tangerine tree ´Cleópatra´ and 75% on lemon tree ´Cravo´ were found. The production of citrus rootstocks in hydroponics is an innovatory technique which provides the optimization of the physical space, the obtaining of healthy material at a lower cost than in the conventional systems.