Acúmulo De Fitomassa De Cultivares De Alface Hidropônica Submetidas À Salinidade

Guimarães, Rafaela Félix Basílio; Nascimento, Ronaldo do; Ramos, Jailton Garcia; Lima, Sabrina Cordeiro de; Cardoso, José Alberto Ferreira; Melo, Daniele Ferreira de

doi:10.7127/rbai.v11n800701

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The treatments were represented by five nutrient solutions (S1 -standard nutrient solution; S2standard nutrient solution + NaCl (3.5 dS m -1 ); S3 -standard nutrient solution + NaCl (3.5 dS m -1 ) + Ca(NO 3 ) 2 (50% = 6.86 mmol L -1 ); S4 -standard nutrient solution + NaCl (3.5 dS m -1 ) + Ca(NO 3 ) 2 (100% = 9.15 mmol L -1 ); S5 -standard nutrient solution + NaCl (3.5 dS m -1 ) + Ca(NO 3 ) 2 (150% = 11.43 mmol L -1 )). The salinity level of irrigation water and the definition of percentages of calcium fertilization were based on the work of Guimarães et al (2017) and Oliveira et al (2018), who also worked with lettuce.…”

Section: Methodsmentioning

confidence: 99%

Semi-hydroponic cultivation of fertigated curly lettuce with calcium nitrate-enriched saline solutions

Pessoa

Neta

Oliveira

et al. 2023

Rev. bras. eng. agríc. ambient.

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Lettuce is a leafy vegetable sensitive to salinity, and under saline stress conditions it presents nutritional imbalance, mainly in calcium absorption. Thus, the objective was to evaluate the effect of enriching the nutrient solution with calcium nitrate in solutions prepared with saline water in the lettuce crop. A completely randomized design was used, with five treatments and four replicates. The treatments were represented by five nutrient solutions [S1 - standard nutrient solution (SNP); S2 - SNP + NaCl (3.5 dS m-1); S3 - S2 + Ca (NO3)2 (50% = 6.86 mmol L-1); S4 - S2 + Ca(NO3)2 (100% = 9.15 mmol L-1); S5 - S2 + Ca(NO3)2 (150% = 11.43 mmol L-1)] in lettuce from the curly group, cv. Elba. After preparing the nutrient solutions, the solutions had the following electrical conductivities: 1.8 (S1); 4.8 (S2); 5.4 (S3); 6.0 (S4); 6.6 (S5) dS m-1. Variables of growth, nutrition and postharvest quality of lettuce were evaluated. With the exception of stem diameter, number of total leaves, plant pH and vitamin C content, the other variables were affected by the extra addition of Ca(NO3)2 in the nutrient solutions. The lettuce cv Elba grown in coconut fiber is tolerant to the salinity of 4.8 dS m-1 (S2). In conditions where the use of saline water with 3.5 dS m-1 for the preparation of the nutrient solution is unavoidable, the use of extra doses of Ca(NO3)2 in the lettuce crop is not recommended.

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Section: Methodsmentioning

confidence: 99%

Semi-hydroponic cultivation of fertigated curly lettuce with calcium nitrate-enriched saline solutions

Pessoa

Neta

Oliveira

et al. 2023

Rev. bras. eng. agríc. ambient.

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“…Under the combinations C1, C3 and C4, SDM was affected by the increase in salinity, and the highest estimated values were 9.7 g (0.4 dS m -1 ), 8.1 g (0.3 dS m -1 ) and 8.9 g (1.6 dS m -1 ). The decrease in dry mass may be a consequence of the decrease in the osmotic potential of the soil, causing reduction in water absorption by plants and, consequently, inhibition of photosynthesis, dehydration of cell membranes and changes in enzymatic activities (Guimarães et al, 2017), as well as changes in ionic balance, closure of stomata, photosynthetic efficiency and carbon allocation (Taiz et al, 2017).…”

Section: Source Ofmentioning

confidence: 99%

Morphology of ‘Crioula’ guava seedlings under irrigation with increasing salinity water and nitrogen/potassium fertilization

Rodrigues-Filho,

Nobre,

Santos

et al. 2023

Braz. J. Biol.

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Several studies have been conducted evaluating the management of fertilizers as strategies to mitigate the deleterious effects of salt stress, so the objective of this work was to evaluate the quality of ‘Crioula’ guava seedlings under irrigation with water of different salinity levels and fertilized with combinations of nitrogen and potassium. The experiment was performed in a protected (screened) environment using a randomized block design and analyzed in a 5 × 4 factorial scheme, with four replicates, with the plot formed by two plants. The treatments were formed from the combination of the factor electrical conductivity of irrigation water (ECw 0.3, 1.1, 1.9, 2.7 and 3.5 dS m-1), with the factor combinations (C) of nitrogen (N) and potassium (K2O) doses, being C1 = 70% N + 50% K2O, C2 = 100% N + 75% K2O, C3= 130% N + 100% K2O and C4= 160% N + 125% K2O. The recommended dose of 100% N and K, respectively, was 541.1 mg N dm-3 soil and 798.6 mg K dm-3 soil. The combinations of N and K fertilization corresponding to 70% N + 50% K2O and 100% N + 75% K2O of the recommended doses promoted greater growth of ‘Crioula’ guava seedlings. Water with ECw of 2.1 dS m-1 promotes the formation of quality ‘Crioula’ guava seedlings.

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“…O uso de água salina no cultivo do girassol suplementado com macrófitas pode ser uma alternativa para pequenos produtores, bem como para conhecer as alterações fisiológicas e bioquímicas resultantes dessa adubação em condições de estresse. Assim, torna-se importante o desenvolvimento de pesquisas e técnicas que otimizem a produção de insumos com o uso de águas salinas (MORAES et al, 2014;COVA et al, 2017;GUIMARÃES et al, 2017;.…”

Section: Introductionunclassified

PRODUÇÃO DE MATÉRIA SECA E ATIVIDADE ENZIMÁTICA ANTIOXIDATIVA DE PLÂNTULAS DE GIRASSOL SOB CONDIÇÕES DE ESTRESSE SALINO SUPLEMENTADAS COM Salvinia auriculata

Sousa

Brito

Ferreira

et al. 2023

NAT

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A cultura do girassol apresenta aclimatação às diversas condições climáticas, deste modo, justifica-se o destaque e competitividade na produção de biodiesel no Brasil. Contudo, as condições edafoclimáticas semiáridas e o atual modelo de produção agrícola limitam a cultura, uma vez que estresses abióticos como o estresse salino, ocasionam distúrbios no crescimento, desenvolvimento e redução da produtividade das plantas. O objetivo do trabalho foi avaliar o crescimento e a atividade enzimática antioxidativa de plântulas de girassol sob condições salinas suplementadas com a macrófita Salvinia auriculata no substrato avaliando-se a produção de massa seca e as atividades antioxidativas dismutase do superóxido (SOD), catalase (CAT), peroxidase de ascorbato (APX) e peroxidase do guaiacol (GPX) em folhas e raízes. O delineamento experimental inteiramente casualizado em que o primeiro arranjo correspondeu a uma testemunha sem o sal e as duas concentrações de NaCl em solução aquosa (50 e 100 mM de NaCl) e o segundo arranjo para três tipos de substratos (areia; areia + húmus comercial 80 kg N ha-1 e areia + Salvinia auriculata 120 kg N ha-1), com 5 repetições por tratamento. Verificou-se que o aumento gradativo das concentrações de NaCl provocou maiores descréscimo na produção de massa seca. De modo geral, houve aumento nas atividades das enzimas antioxidativas, principalmente nas plantas que receberam suplementação Salvinia auriculata. Os dados demonstraram que a suplementação com Salvinia auriculata ocasionou proteção contra os danos oxidativos do estresse salino e minimização dos efeitos deletérios do estresse salino no crescimento vegetal. Palavras-chave: energias renováveis; Helianthus annuus L.; adubação nitrogenada; salinidade. Dry mass production and antioxidative enzymatic activity in sunflower seedlings under salt stress conditions supplemented with Salvinia auriculata ABSTRACT: The sunflower culture presents acclimatization to the various climatic conditions, thus justifying the prominence and competitiveness in the production of biodiesel in Brazil. However, the semi-arid soil and climate conditions and the current agricultural production model limit the crop, since abiotic stresses such as saline stress cause disturbances in growth, development and reduction of plant productivity. The objective of the work was to evaluate the growth and the antioxidative enzymatic activity of sunflower seedlings under saline conditions supplemented with the macrophyte Salvinia auriculata in the substrate by evaluating the dry mass production and the antioxidative activities dismutase of superoxide (SOD), catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) in leaves and roots. The experimental design was entirely randomized in which the first arrangement corresponded to a witness without salt and two concentrations of NaCl in aqueous solution (50 and 100 mM of NaCl) and the second arrangement for three types of substrates (sand; sand + commercial humus 80 kg N ha-1 and sand + Salvinia auriculata 120 kg N ha-1), with 5 repetitions per treatment. It was verified that the gradual increase of NaCl concentrations caused a greater decrease in dry mass production. In general, there was an increase in the activities of the antioxidative enzymes, mainly in the plants that received Salvinia auriculata supplementation. The data showed that the supplementation with Salvinia auriculata caused protection against the oxidative damages of the saline stress and minimization of the deleterious effects of the saline stress on the plant growth. Keywords: renewable energies; Helianthus annuus L.; nitrogen fertilization; salinity.

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Acúmulo De Fitomassa De Cultivares De Alface Hidropônica Submetidas À Salinidade

Cited by 3 publications

References 5 publications

Semi-hydroponic cultivation of fertigated curly lettuce with calcium nitrate-enriched saline solutions

Semi-hydroponic cultivation of fertigated curly lettuce with calcium nitrate-enriched saline solutions

Morphology of ‘Crioula’ guava seedlings under irrigation with increasing salinity water and nitrogen/potassium fertilization

PRODUÇÃO DE MATÉRIA SECA E ATIVIDADE ENZIMÁTICA ANTIOXIDATIVA DE PLÂNTULAS DE GIRASSOL SOB CONDIÇÕES DE ESTRESSE SALINO SUPLEMENTADAS COM Salvinia auriculata

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