Abstract
ABSTRACT The semi-arid region has long periods of drought, so reusing water is an important alternative to enable irrigated agriculture. The objective of this study was to evaluate the growth and mineral composition of papaya and passion fruit seedlings irrigated with gray water effluents. Two experiments were carried out with papaya and passion fruit seedlings. For nondestructive analyses, the experimental arrangement was in splitplots in time, with plots consisting of three types of irrigation water (gray water effluent; supply water and mixture of gray water and supply water, at 1:1 ratio) and subplots formed by the evaluation times 30, 60 and 75 days after sowing, with three replicates and five plants per replicate. For destructive analyses, the experimental arrangement was a simple randomized block design, with three treatments, corresponding to the irrigation waters, with three replicates and five plants per replicate. The seedlings irrigated with gray water effluent had higher values of plant height, stem diameter, length of the largest root, shoot dry mass and root dry mass. N, K, Ca, Mg, Fe, Mn and Zn contents in the tissue of papaya seedlings, cv. ‘Golden’, were not altered by irrigation with gray water effluent. N, Fe and Zn contents in the tissue of passion fruit seedlings, cv. ‘Redondo Amarelo’, were increased by the application of gray water effluent, while P, K, Ca, Mg and Mn contents were not influenced.
Highlights
The semi-arid region has long periods of drought, so reusing water is an important alternative to enable irrigated agriculture
Gray water has been increasingly used as a source of water in agricultural production, since domestic sewage is available to the farmer every day and, when treated, can promote an increase in the yield and quality of the agricultural product, providing considerable levels of macro- and micronutrients necessary for the development of agricultural crops, besides minimizing the environmental impacts caused by their disposal into the environment (BATISTA et al, 2017)
Plant height (PH), stem diameter (SD) and number of leaves (NL), the experimental arrangement was in split-plots in time, with plots consisting of three types of irrigation water: GW - gray water effluent; SW - supply water and M - mixture of gray water effluent and supply water, at 1:1 ratio
Summary
The semi-arid region has long periods of drought, so reusing water is an important alternative to enable irrigated agriculture. The objective of this study was to evaluate the growth and mineral composition of papaya and passion fruit seedlings irrigated with gray water effluents. Objetivou-se com este trabalho avaliar o crescimento e composição mineral de mudas de mamoeiro e maracujazeiro irrigadas com efluentes de água cinza. O arranjo experimental foi de blocos casualizados simples, com três tratamentos, correspondentes às águas de irrigação, com três repetições e cinco plantas por repetição. The Brazilian semi-arid region suffers from water scarcity in terms of quantity, so the incorporation of lower quality waters, such as gray water effluents, is necessary for a successful production in this region, from the stage of seedlings to the stage of production of crops, such as papaya and passion fruit (OLIVEIRA et al, 2015; SÁ et al, 2016)
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