Avaliação da qualidade do serviço de abastecimento de água em Campina Grande-PB com o uso de indicadores, incluindo o de satisfação dos usuários

Medeiros, Eduarda Lucena de; Rodrigues, Andréa Carla Lima; Barbosa, Dayse Luna; Feitosa, Patrícia Hermínio Cunha; Coura, Mônica de Amorim

doi:10.36659/dae.2020.045

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…To prepare the water with electrical conductivity of 4.0 dS m -1 , the soluble salts NaCl, CaCl 2 .2H 2 O, and MgCl 2 .6H 2 O were used in an equivalent ratio of 7:2:1 (Medeiros, 1992) between Na, Ca, and Mg, respectively, following the relationship between ECw and its molar concentration (mmol c L -1 = EC x 10).…”

Section: Methodsmentioning

confidence: 99%

Phosphate fertilization, biofertilizer and Bacillus sp. in peanut cultivation under salt stress

Oliveira,

Viana,

Sousa

et al. 2024

Rev. bras. eng. agríc. ambient.

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Peanut (Arachis hypogaea) is an important agricultural crop in Brazil, considered one of the most important oilseed crops cultivated. The use of fertilizer-solubilizing bacteria can mitigate salt stress. The objective of this study was to evaluate the gas exchange, growth, and water use efficiency of the peanut crop irrigated with brackish water under phosphate fertilization and inoculated with bacteria of the genus Bacillus sp. The experimental design used in this study was completely randomized, in a 4 × 2 × 2 factorial scheme, with 5 replicates, referring to the forms of fertilization (F1 - 0% phosphorus, F2 - 50% phosphorus, F3 - 100% phosphorus, and F4 - bovine biofertilizer), presence and absence of the inoculant and two levels of electrical conductivity of the irrigation water (ECw - 0.3 and 4.0 dS m-1). Fertilization with organic fertilizer (100% biofertilizer) and mineral fertilizer (50 and 100% phosphorus) associated with Bacillus sp. mitigated the damage caused by salt stress and promoted greater water use efficiency, chlorophyll index, internal CO2 concentration and stem diameter. The control treatment (without phosphate fertilization and without salt stress) and the application of Bacillus sp. promoted greater performance in net photosynthesis, transpiration rate, stomatal conductance, and plant height in peanut plants.

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Section: Methodsmentioning

confidence: 99%

Phosphate fertilization, biofertilizer and Bacillus sp. in peanut cultivation under salt stress

Oliveira,

Viana,

Sousa

et al. 2024

Rev. bras. eng. agríc. ambient.

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“…The water supply of 0.8 dS m -1 (Table 2) was stored in 500-L water tanks and used to prepare the 3.0 dS m -1 saline solution, made with sodium chloride (NaCl), calcium chloride (CaCl 2 .2H 2 O) and magnesium chloride (MgCl 2 .6H 2 O) in the proportion of 7:2:1 (Medeiros 1992), and maintaining the ratio between the water electrical conductivity and the molar concentration (mmol c L -1 = EC × 10). OM: organic matter; SB: sum of bases; ESP: exchangeable sodium percentage; ECse: electrical conductivity of the soil saturation extract.…”

Section: Methodsmentioning

confidence: 99%

Soil chemical attributes under combinations of organic fertilizing and water salinity

Freire

Sousa

Viana

et al. 2023

Pesqui. Agropecu. Trop.

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The use of brackish water causes chemical changes in cultivated soils. It is therefore necessary to apply strategies that can minimize its negative impacts, such as the use of organic fertilizers. This study aimed to evaluate in the field the chemical attributes of a Red Yellow Argisol under irrigation with saline water and organic fertilizing in an area cultivated with corn. The design was randomized blocks, in a split-plot scheme, with the plots comprising salinity levels for the irrigation water (0.8 and 3.0 dS m-1) and the subplots combinations of organic fertilizers (cattle manure + poultry biofertilizer + goat biofertilizer; cattle manure + goat biofertilizer; cattle manure + poultry biofertilizer; control), with four replications. The 3.0 dS m-1 irrigation has a negative effect on the soil chemical attributes, particularly reducing the pH and increasing the sodium, exchangeable sodium percentage and electrical conductivity of the soil saturation extract. The combination of cattle manure + poultry biofertilizer + goat biofertilizer mitigates the salt stress by favouring the accumulation of nitrogen and organic matter, while the cattle manure + poultry biofertilizer favours the potassium accumulation in the soil. The combination of cattle manure + poultry biofertilizer + goat biofertilizer increases the contents of phosphorus and potassium when using the 0.8 dS m-1 irrigation.

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“…The lowest salinity water (0.3 dS m -1 ) came from the local water supply. The 3.0 dS m -1 saline solution was prepared by adding sodium chloride (NaCl), calcium chloride (CaCl2.H2O) and magnesium chloride (MgCl2.6H2O), in the proportion of 7:2:1, respectively (Medeiros, 1992), to the supply water, in order to obtain the desired electrical conductivity, according to the ratio between ECw and its concentration (mmolc L -1 = EC × 10), according to Richards (1954). The highest salt level of the water tested in this research is commonly observed in the semi-arid region of Northeast Brazil.…”

Section: Methodsmentioning

confidence: 99%

Morphophysiology of passion-fruit seedlings in different substrates under different strategies of irrigation with brackish water

Lessa

Sousa

et al. 2023

Rev. ambiente água

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The presence of salts in the irrigation waters of the semiarid region negatively affects the production of seedlings. Thus, substrates based on carbonized rice husk are an alternative for production in saline environments, associated with irrigation management strategies with brackish water. This study evaluated the physiological responses of yellow passion-fruit seedlings as a function of irrigation strategies with brackish water in different substrates. The study was developed at the Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Redenção, Ceará. The design was entirely randomized, in a 2 × 5 factorial scheme with two substrate compositions (S1 - soil; S2 – sandy soil, sand and carbonized rice husk - 1:1:1 – volume basis) and five irrigation strategies with brackish water (IS1 - low salinity water during the entire cycle 1-65 days after sowing (DAS); and salt stress initiation at: IS2 - 11 DAS; IS3 - 16 DAS; IS4 - 21 DAS; IS5- 26 DAS), with five repetitions. Soil as a substrate was efficient for photosynthesis and chlorophyll. It also provided better results for transpiration, stomatal conductance and leaf area regardless of the strategy. Internal carbon concentration and water use efficiency were higher in soil associated with saline stress at 11, 16 and 21 DAS. Under the same substrate, the stem diameter of the seedlings was greater when irrigated with lower salinity during the phase. The substrate composed of carbonized rice is associated with greater seedling height and increased leaf temperature. Keywords: plant physiology, Passiflora edulis, salinity, substrate.

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Avaliação da qualidade do serviço de abastecimento de água em Campina Grande-PB com o uso de indicadores, incluindo o de satisfação dos usuários

Cited by 4 publications

References 10 publications

Phosphate fertilization, biofertilizer and Bacillus sp. in peanut cultivation under salt stress

Phosphate fertilization, biofertilizer and Bacillus sp. in peanut cultivation under salt stress

Soil chemical attributes under combinations of organic fertilizing and water salinity

Morphophysiology of passion-fruit seedlings in different substrates under different strategies of irrigation with brackish water

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