Efeitos da fertirrigação com efluente do tratamento primário da água residuária da suinocultura no solo e na produtividade e qualidade do tomate (Lycopersicon esculentum Mill.)

• Autor(a) principal: Souza, José Antonio Rodrigues de
• Data de Publicação: 2009
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/647
• topic: Tomate; Água residuária de suinocultura; Fertirrigação; Tomato; Wastewater from swine; Fertirrigation; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA

In this study was analyzed the effects of fertirrigation with filtrated wastewater from swine (FWS) on soil and the physiological, sanitary variables and of tomato production, in drainage lysimeters under protected environment. The experiment was carried out in the lysimeter station at the Hydraulic, Irrigation and Drainage Experimental Area, in campus of the Universidade Federal de Viçosa, Minas Gerais State. The treatments were constituted of witness (T1 - irrigation and fertilization recommended for tomato) and fertirrigation with FWS supplying 100, 150 and 200% of the nitrogen doses recommended for tomato without fertilization complementation (T2, T3 and T4) and with application of fertilizer complementation (T5, T6 and T7), respectively. The FWS doses were calculated as suggested by EPA (Environment Protection Department), considering the contamination risks of subterranean water with nitrate. Were analyzed physical and chemical variables of the soil, physiological and of tomato production, as well as of tomato fruits quality and sanity. The results showed: the chemical application of fertilizer was more effective in the soil solution ionization than FWS, presenting CEes' larger values and ISNa; FWS application resulted in increments in the potassium concentrations, calcium and exchangeability magnesium, effective CTC, available phosphorus and total nitrogen, and reduction in pH value; the variations in the total porosity, microporosity, specific mass and hydraulic conductivity were current of the soil restructuring and accommodation in lysimeters; fertirrigations with FWS did not change significantly time of bloom, stem diameter, number of expanded, predawn leaf- water potential, photosynthesis, stomatic conductance and tomato breathing, but provided increase in the leaf area and needs nutritional supply, resulting in flavored and healthy fruits of the sanitary point of view; considering environmental aspects and of production cost, the treatment 4 stands out as the best culture management option, however, the application of 150% of the needs to culture nitrogen with FWS application proceeds being a technical recommendation and environmentally more adequate.