Modelo matemático para estimativa do tempo de fertirrigação

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2006-02-20

Autores

Villas Boas, Roberto Lyra

Agronomia (Irrigação e Drenagem) - FCA

Acesso aberto

Resumo

Resumo (inglês)

The agricultural production system , as well as others productive systems, demand an agreement of its different interfaces, resulting on the development of new technologies, as the improvement of established technologies. Considering this approach, fertigation factors , as well as the management of the irrigated fertigated agricultural system, must be better studied and understood. The operation time of an irrigation-fertigation system, has to consider two distinct management situations : a) when there is no irrigation depths to be applied by the irrigation system, and b) when an irrigation depth exists to be restituted, superior to minimum depth that is applied when the only aims the fertigation practice. In the first situation, the operation time of the irrigation-fertigation system has to be as brief as possible; while in the second, the operation of fertilizers injection has to be placed during the total time of system operation, as applied fertilizer is not located below root system depth . In this context, the present work had the objective of developing a mathematical model that assisted in management operation time of agricultural system, irrigated by trickle irrigation, and where the fertigation is practiced. It has been considered variables of the model, parameters of hydraulical irrigation systems designs, as: lengths and diameters of the mainline, derivation and lateral lines. Relative flows in the different parts of irrigation system, and aspects about fertilizer solution , as: volume of solution and amount of fertilizer supplied also had been considered. The validation of the model was carried out by comparing the temporal and spatial dynamics of K in two irrigation systems, an experimental and a commercial one. From the resulting model , it was developed a computational applicatory called Gerferti - Fertigation Management... (Complete abstract, click electronic address below).

Português

Como citar

OLIVEIRA, Marcus Vinícius Araújo Mello de. Modelo matemático para estimativa do tempo de fertirrigação. 2006. xi, 90 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2006.