Production of Flowers of Ornamental Sunflower Irrigated With Wastewater From Fish Culture

Abstract

The unregulated use and increased demand in face of the demographic and economic growth of society caused reduction in the availability of water resources in quantity and quality. In this context, this work was carried out to verify the possibility of producing ornamental sunflower (Helianthus annuus L.) fertirrigated with wastewater from fish culture and its mixtures with tap water. Two experiments were conducted in 2017 in a greenhouse at Federal Rural do University of the Semiarid, in Mossoró, RN, Brazil, according to a completely randomized design with 12 replicates. The treatments consisted of dilutions of the fish's wastewater in tap water (0, 25, 50, 75 and 100%). Determinations of plant biomass and flower characteristics were performed. The statistical analysis of the data consisted of analysis of variance by the F test and regression analysis. The biomass of ornamental sunflower showed significant effect of the fish’s effluent dilutions, but, in general, characteristics of flowers were not influenced. The higher values of the variables of the ornamental sunflower evaluated in the first experiment, which received fertilization, indicate that the effluent did not supply the nutritional needs of the plants. The irrigation of the ornamental sunflower can be carried out with effluent from fish farming when there is another source of nutrients for the crop to produce flowers with satisfactory characteristics.

Potential Use of Eucalyptus Seedling in Recycling of Fish Farming Wastewater in Agriculture

“…The lowest biomass accumulation in the shoot occurred in the fertigation of the seedlings with only wastewater. Similarly, [12] report that the irrigation of ornamental sunflowers can be carried out with effluents from fish farming when there is another source of nutrients in order for the crop to produce flowers that meet the quality standards.…”

“…Some studies in the literature indicate the possibility of using fish farming wastewater in cultivating Roman lettuce (Lactuca sativa) [11] and in flower production such as with ornamental sunflower [12]. However, further studies are needed which seek to associate fish farming with seedling production of forest species, such as eucalyptus.…”

Biomass and essential oil production of basil at recirculation intervals of nutrient solutions prepared with treated domestic effluents

“…In this context, other lower-quality water sources such as wastewater (Al-Khamisi et al 2018) have been used in irrigation (Santos Júnior et al 2016a;Abd-Elwahed 2018;Guimarães et al 2018;Souza et al 2018). Besides water provision, these sources also offer nutrients to plants (Trinh et al 2013;Dantas et al 2018;Rêgo et al 2019;Xavier et al 2019).…”

Cultivo De Manjericão Utilizando Efluente Doméstico Tratado Em Sistemas Hidropônicos Sob Diferentes Espaçamentos Entre Plantas

“…Nesse contexto, outras fontes hídricas de qualidade inferior, como as águas residuárias, têm sido utilizadas na irrigação (SANTOS JÚNIOR et al, 2016;MKHWANAZI;VILANE, 2018;SOUZA et al, 2018;TAHTOUH et al, 2019). Além do aporte hídrico, tais águas servem como fonte de nutrientes às plantas (RÊGO et al, 2019;XAVIER et al, 2019).…”