Uso e qualidade de água subterrânea utilizada por agricultores familiares no Território Sertão Produtivo, Estado da Bahia, Nordeste do Brasil

Lima, Brisa Ribeiro de; Oliveira, Elcivan Pereira; Júnior, Enok Pereira Donato; Bebé, Felizarda Viana

doi:10.21438/rbgas(2020)071615

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Thus, it is necessary to look for alternative water sources, such as underground waters, which generally have high concentrations of salts and, in many cases, make conventional cultivation in soil impossible. In this context, the use of cultivation systems that enable the use of these resources, such as hydroponics, stands out in importance (LIMA et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

et al. 2022

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Knowledge about the effect of chemical conditioners on the reduction of the deleterious effects caused by salinity on crops is of great importance for the expansion of the cultivation of vegetable crops such as zucchini in the semi-arid region of the Northeast. In this context, the objective of the present study was to evaluate the effect of the foliar application of hydrogen peroxide as a mitigator of salt stress on the gas exchange, production, and postharvest fruit quality of zucchini cultivated in a hydroponic system. The study was conducted in NFT-type (Nutrient Film Technique) hydroponic system in a greenhouse, in Pombal — PB, Brazil. The experimental design was completely randomized, in a 4 × 4 factorial scheme, corresponding to four levels of electrical conductivity of the nutrient solution - ECns (2.1 (control); 3.6; 5.1 and 6.6 dS m−1), and four concentrations of hydrogen peroxide - H2O2 (0; 20; 40 and 60 μM), with three replicates. Nutrient solution with electrical conductivity above 2.1 dS m−1 caused a reduction in gas exchange and the total number of fruits of zucchini. An increase in nutrient solution salinity levels increased the total soluble solids content of the fruits and the initial fluorescence of zucchini. Under conditions of nutrient solution salinity above 2.1 dS m−1, hydrogen peroxide could not mitigate the effects of salt stress. Application of 20 μM of H2O2 when the plants were grown in a nutrient solution of 2.1 dS m−1 promoted higher total fruit weight and basal diameter of the fruits.

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Section: Introductionmentioning

confidence: 99%

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

et al. 2022

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“…Para alcançar a sustentabilidade da agricultura irrigada, os agricultores devem administrar a irrigação de maneira adequada. O conhecimento da qualidade das águas relacionado à concentração de salinidade tornou-se uma ferramenta indispensável para o planejamento, desenvolvimento e gestão dos recursos hidrológicos (LIMA et al, 2020).…”

Section: Classificação Da Fao Ayers E Westcot (1985)unclassified

Qualidade da água para irrigação na bacia hidrográfica do Rio Branco, no Sudoeste Mato-grossense: região de expansão do agronegócio

Oliveira

Queiróz²

2022

Rev. Agro. Amb.

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O estudo teve como objetivo caracterizar e avaliar a qualidade da água da bacia hidrográfica do rio Branco por meio de diretrizes de uso na irrigação, considerando aspectos de salinidade, sodicidade, toxicidade e risco de redução de infiltração. As coletas de água foram realizadas mensalmente, de outubro de 2017 a setembro de 2018, em doze pontos distribuídos ao longo da bacia. Foram analisadas variáveis físico-químicas e microbiológicas: temperatura, potencial hidrogeniônico, sólidos totais, turbidez, condutividade elétrica, sódio, potássio, cálcio, magnésio, bicarbonatos, cloretos, coliformes totais e termotolerantes. Os resultados revelaram águas em conformidade para uso na irrigação, com restrição de uso para as variáveis de turbidez, potencial hidrogeniônico e coliformes termotolerantes. A classificação do Laboratório de Salinidade dos Estados Unidos indicou todos os pontos com águas de risco nulo de salinidade e risco baixo de sodicidade. A classificação da Organização das Nações Unidas para Alimentação e Agricultura, constatou ausência de restrição de uso quanto à salinidade e toxicidade, contudo todos os pontos analisados apresentaram grau de restrição severa quanto ao risco de redução da infiltração.

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“…The scarcity of surface water and irregular rainfall in semi-arid regions promotes the reduction of the volume of freshwater, thus, the little water that exists comes from underground sources, which mostly have a high level of salts (Lima et al 2020). Salt stress, in turn, delays germination, causes growth stunting, seedling mortality, and reduces yield (Al-Dakheel;Hussain;Rahman, 2015).…”

Section: Introductionmentioning

confidence: 99%

Growth and leaf area analysis of buffel grass subjected to salt stress

Marciano

Lima

Batista

et al. 2022

RSD

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Buffel grass has characteristics of resistance and rapid recovery to prolonged drought, however, few studies indicate this resistance to salinity. Thus, the objective was to evaluate the relationship between salt stress and the growth dynamics, green mass production and area of Buffel grass. The experiment was conducted in an entirely randomized design, with three levels of salinity and ten repetitions, totaling 30 experimental units. Measurements of height, cutting and weighing of green mass were made in three periods, with intervals of 28 days between them, and photography of the leaves for analysis in ImageJ software in the last period. The data obtained were submitted to the Shapiro-Wilk normality test and Bartlett's homogeneity test. Kruskal-Wallis non-parametric test and Dunn's post-test was applied for data that did not follow normality, and ANOVA test and Tukey's post-test for those that followed normality and homogeneity. The results indicate that there was no significant difference in height for the treatments with or without salt, so even with the addition of salt there was no interference in growth, but when compared in relation to the periods, it can be observed that the last period was different from the others, this can be explained by the vegetative vigor of the plant, because when it is younger it has more efficient cell multiplication, but as it suffers injuries, the vigor is decreased and growth is slower. Therefore, there are some differences in the behavior of grass submitted to salinity, but they do not significantly interfere in its development.

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Uso e qualidade de água subterrânea utilizada por agricultores familiares no Território Sertão Produtivo, Estado da Bahia, Nordeste do Brasil

Cited by 8 publications

References 6 publications

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

Qualidade da água para irrigação na bacia hidrográfica do Rio Branco, no Sudoeste Mato-grossense: região de expansão do agronegócio

Growth and leaf area analysis of buffel grass subjected to salt stress

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