Effect of Saline Stress and Calcium Nitrate on Lettuce Grown on Coconut Fiber

Oliveira, Francisco de Assis de; Marques, Isabelly Cristina da Silva; Targino, Ana Jacqueline de Oliveira; Cordeiro, C. J. X.; Oliveira, Mychelle Karla Teixeira de; Régis, Lúcia R. de L.; Costa, Paula A. de A.; Freitas, Rafaelle da Silva

doi:10.5539/jas.v10n11p259

Cited by 4 publications

(3 citation statements)

References 20 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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“…This message is initially produced by the roots and, eventually, the Ca 2+ concentration of the shoots decreases which is likely due to the inducible changes of Na + on the amount of Ca 2+ in the cell. Oliveira et al (2018) reported that the interaction between salt stress and calcium nitrate on the number of leaves in lettuce cultivars was significant as the leaf number decreased along with increasing the salinity level, while a foliar application of Ca(NO 3 ) 2 was able to moderate the effect of the salt stress on reducing the leaf number.…”

Section: Interaction Between the Salinity And Calcium Nitrate On The ...mentioning

confidence: 99%

“…Calcium ions maintain the integrity of the plasma membrane in root and shoot cells which are essential for normal cell viability and function (Yarnia et al 2009). Oliveira et al (2018) concluded that the application of calcium nitrate at different levels of salinity stress improved the leaf area index in two lettuce cultivars. In fact, a decrease in the growth and develop- https://doi.org/10.17221/105/2021HORTSCI ment of most plants under salinity may be attributed to a decrease in their leaf area (Munns 2002).…”

Section: Interaction Between the Salinity And Calcium Nitrate On The ...mentioning

confidence: 99%

Modulation of nutritional and biochemical status of hydroponically grown Cucurbita pepo L. by Calcium Nitrate under saline conditions

Behtash,

Hajizadeh,

Tarighi

2023

Hortic. Sci.

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Salinity is one of the critical environmental factors that decreases the water availability and induces nutritional imbalance in crops. In order to study the effect of calcium nitrate [(Ca(NO 3 ) 2 ] in the nutrient solution under salinity conditions, an experiment was designed with different salinity (0, 50, and 100 mM) and Ca(NO 3 ) 2 (2, 3, and 4 mM) levels on Cucurbita pepo (zucchini). Based on the results, an increase in the salinity from 0 to 100 mM caused a decrease in the leaf potassium and calcium concentration, whereas the iron, magnesium and zinc concentrations increased. The most effective Ca(NO 3 ) 2 level in increasing the nutritional quality and yield of zucchini was 3 and 4 mM. Salinity at 50 and 100 mM significantly increased the leaf sodium concentration and leaf area as well as the leaf number per plant, while the application of both Ca(NO 3 ) 2 levels modulated the harmful effects of salinity. The amount of malondialdehyde (MDA), proline and hydrogen peroxide (H 2 O 2 ) as well as the catalase (CAT) activity increased under the severe salinity conditions, whereas the application of 4 mM Ca(NO 3 ) 2 had the potential of removing the negative effects of severe salinity. The catalase activity increased along with the increase in the Ca(NO 3 ) 2 concentration, which was independent from the salinity level. However, the amount of proline, MDA and H 2 O 2 decreased in plants fed with 3 and 4 mM Ca(NO 3 ) 2 compared to the control in the presence of salinity. These findings suggest that both the 3 and 4 mM concentrations of Ca(NO 3 ) 2 under 50 mM salinity could be used to improve the zucchini performance by maintaining the ion homeostasis and inducing the antioxidant defence system.

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Electrical conductivity of the nutrient solution for soilless cultivation of kohlrabi

et al. 2022

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The electrical conductivity of the nutrient solution directly affects production and quality of the plants. We evaluated the electrical conductivity suitable for soilless cultivation of kohlrabi. The experiment was carried out in a completely randomized design, with four replicates and five treatments, composed of different nutrient solution’s conductivities (1.31, 1.71, 2.37, 2.98 and 3.75 dS m-1). We evaluated number of leaves, leaf area, specific leaf area, leaf area ratio, fresh and dry masses of leaves, bulb, roots and total, bulb volume, water content in the bulbs and pH, soluble solids, vitamin C, firmness, titratable acidity and SS/TA ratio of the bulbs. All variables related to growth were affected by the nutrient solutions, showing the highest values with the use of the nutrient solutions with EC close to 2.0 dS m-1. Considering the commercial part of the plant, the most developed bulbs were obtained with EC of 1.96 dS m-1, being 49.9 g and 41.15 cm3 per bulb. On the other hand, except for pH, the other variables responded to the increase of EC. Higher values for pulp firmness and titratable acidity occurred with EC close to 2.0 dS m-1, whereas the other variables showed higher values using a more concentrated nutrient solution.

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Effect of Saline Stress and Calcium Nitrate on Lettuce Grown on Coconut Fiber

Cited by 4 publications

References 20 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

Modulation of nutritional and biochemical status of hydroponically grown Cucurbita pepo L. by Calcium Nitrate under saline conditions

Electrical conductivity of the nutrient solution for soilless cultivation of kohlrabi

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