Revista Ciencias Técnicas Agropecuarias
versão On-line ISSN 2071-0054
DUARTE DIAZ, Carmen et al. Dosage of fertilizer for the fertirrigation of the protected tomato in Ciego de Ávila. Rev Cie Téc Agr [online]. 2010, vol.19, n.3, pp. 12-16. ISSN 2071-0054.
The approach of dosage of nutriments for fertirrigation, starting from the curves of dry matter, based on total air biomass in the cropping house of reference belonging to the module Santana, in Ciego de Ávila province it is evaluated as objective, though it has been demonstrated that fertirrigation is a successful technique, there are still problems indispensable as to specify the dose of fertilizers that should be used to increase the efficiency of use of the nutriments and to foster the profitability of producting without deterioration of the natural resources. It was monitored and evaluated and the corresponding corrections refering water quality for irrigation and fertirrigation, besides evaluations on agrochimicals properties to establish a balance and to specify the quantification of the nutriments at level of the system were also made. the curves of accumulation of biomass speed in the tomato Charleston for periods of growth, to verify the efficiency of the fertirrigation applied with the rigid operative programs, settled down in the application of fertilizers of the protected cultivation were estimated, as well as the calculations of the irrigation standards. The accumulation of dry matter in function of biomass air total of the plant, was adjusted to the pattern Bugarín, proposed for tomato in greenhouse and hydroponíc conditions whose tendency can be adjusted according to a function of a direct line and=1,0346x-0,279, with coefficient of determination of 0,77. Crop behavior showed that there was an acceptable management as fertilizer supplies by fertirrigation, in which the required quantity of nutrients supplied, favored the satisfactory development of the plantation according to the planning, still when the contribution for the soil was so faulty, that which didn't contribute to the positive balance, necessary to quantify the amount of nutriments required. The approach of leaf curves of accumulation of biomass allowed defining the efficiency of the contribution of the fertilizers in the fertirrigation of the protected tomato, Charleston variety.
Palavras-chave : fertirrigation; biomass; fertilizer.