Potassium fertilization and salt stress on beet crop

2021 ◽  
pp. 1-8
Author(s):  
Antonio Fabio da Silva Lima ◽  
Murilo de Sousa Almeida ◽  
Kessy Jhonis Silva Gomes ◽  
Geocleber Gomes de Sousa ◽  
Márcio Henrique da Costa Freire ◽  
...  
Keyword(s):  
Salt Stress ◽  
Potassium Fertilization

scholarly journals Salinity management strategies and potassium fertilization in watermelon (Citrullus lanatus) cultivation

2020 ◽  
pp. 1601-1607
Author(s):  
Saulo Soares da Silva ◽  
Geovani Soares de Lima ◽  
Vera Lúcia Antunes de Lima ◽  
Hans Raj Gheyi ◽  
Lauriane Almeida dos Anjos Soares ◽  
...  
Keyword(s):  
Salt Stress ◽  
Saline Water ◽  
Citrullus Lanatus ◽  
Management Strategies ◽  
Co2 Assimilation ◽  
Water Salinity ◽  
Maturation Stage ◽  
Gas Exchanges ◽  
Potassium Fertilization ◽  
Salinity Management

This study aimed to evaluate the gas exchanges and growth of ‘Sugar Baby’ watermelon under different strategies of irrigation with saline water and potassium fertilization, in an experiment conducted in a protected environment. The experiment was conducted in randomized blocks, in 8 x 3 factorial arrangement, corresponding to eight water salinity management strategies applied at the phenological stages of the crop (NS = no stress along the cycle; VE = salt stress during vegetative stage; VE/FL = salt stress during vegetative and flowering stages; FL = salt stress during flowering stage; FL/FR = salt stress during flowering and fruiting stages; FR = salt stress during fruiting stage; FR/MAT = salt stress during fruiting and maturation stages; MAT = salt stress during fruit maturation stage) and three potassium doses – KD (corresponding to 50, 100 and 150% of the recommendation), with three replicates. Two levels of water salinity were used, high and low values of electrical conductivity (ECw = 0.8 and 4.0 dS m-1). Watermelon growth and gas exchanges, especially transpiration, stomatal conductance, CO2 assimilation rate, instantaneous carboxylation efficiency, and absolute and relative growth rates of stem diameter were compromised by water salinity at the stages of flowering, fruiting and maturation. The potassium dose with 50% of K2O recommendation can be used in the cultivation of watermelon, without negatively affecting gas exchange and growth.

scholarly journals GAS EXCHANGES, QUANTUM YIELD AND PHOTOSYNTHETIC PIGMENTS OF WEST INDIAN CHERRY UNDER SALT STRESS AND POTASSIUM FERTILIZATION

2019 ◽  
Vol 32 (2) ◽  
pp. 429-439 ◽  
Author(s):  
ADAAN SUDARIO DIAS ◽  
GEOVANI SOARES DE LIMA ◽  
FRANCISCO WESLEY ALVES PINHEIRO ◽  
HANS RAJ GHEYI ◽  
LAURIANE ALMEIDA DOS ANJOS SOARES
Keyword(s):  
Electrical Conductivity ◽  
Salt Stress ◽  
Quantum Yield ◽  
Chlorophyll A ◽  
Photosynthetic Pigments ◽  
Photochemical Efficiency ◽  
Photosynthetic Apparatus ◽  
West Indian ◽  
Gas Exchanges ◽  
Potassium Fertilization

ABSTRACT Water resources in the semi-arid region of Northeast Brazil commonly contain high salt concentrations, compromising the quality of water for agriculture. Thus, adopting techniques that make the use of these resources feasible in agriculture is fundamental. The present study aimed to evaluate the gas exchanges, quantum yield and photosynthetic pigments of grafted West Indian cherry subjected to salt stress and potassium fertilization under greenhouse conditions in the municipality of Campina Grande, PB, Brazil. Treatments were distributed in randomized blocks, composed of two levels of electrical conductivity - ECw (0.8 and 3.8 dS m-1) of water and four doses of potassium (50, 75, 100 and 125% of the dose recommended for the crop), with three replicates. The dose relative to 100% corresponded to 19.8 g of K2O per plant. Gas exchanges, chlorophyll a fluorescence and photosynthetic pigments of West Indian cherry are negatively affected by irrigation using water with electrical conductivity of 3.8 dS m-1, which compromises the photosynthetic apparatus of the plant, a situation evidenced by the reduction in photosystem II quantum efficiency. Increasing potassium doses led to increments in transpiration, chlorophyll a maximum fluorescence and chlorophyll b content in West Indian cherry grown under salt stress, but do not attenuate the negative effects of irrigation with 3.8 dS m-1 water on its potential photochemical efficiency.

scholarly journals Preservation by lactic fermentation and physicochemical characterization of okra produced underwater salinity and potassium fertilization

2020 ◽  
Vol 41 (6) ◽  
pp. 2495-2508
Author(s):  
Lauriane Almeida dos Anjos Soares ◽  
◽  
Rafael Gonçalves da Silva ◽  
Geovani Soares de Lima ◽  
Giuliana Naiara Barros Sales ◽  
...  
Keyword(s):  
Salt Stress ◽  
Irrigation Water ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Alternative Methods ◽  
Water Salinity ◽  
Average Weight ◽  
Lactic Fermentation ◽  
Potassium Fertilization ◽  
Irrigation Water Salinity

The use of saline water in agricultural production will be increasingly necessary in the next decades. However, postharvest quality may be compromised, as in okra, due to salt stress and/or factors inherent to storage and transportation. In this context, developing alternative methods of preservation, including lactic fermentation, may be a promising way to maintain and even improve the nutritional quality of okra. Thus, the objective was to evaluate the production components of okra subjected to different levels of water salinity and doses of potassium fertilization, and further to evaluate the preservation by lactic fermentation of okra fruits produced under water salinity. The first experiment was carried out in lysimeters under field conditions in Neossolo Regolítico (Psamment) of sandy loam texture in Pombal-PB, in a randomized block design in a 5 x 5 factorial scheme, testing 5 levels of irrigation water salinity (0.3; 1.3; 2.3; 3.3, and 4.3 dS m-1) and 5 doses of potassium fertilization (75; 112.5; 150; 187.5, and 225 mg of K2O kg-1 of soil), with three replicates. After that, the okra fruits produced under the different salinity levels were stored in six mixtures of salts present in lactic fermentation brine (100-0-0, 0-100-0, 0-0-100, 50-50-0, 0-50-50, and 50-0-50 of NaCl, CaCl2, and KCl, respectively), under a 5 x 6 factorial, with three replicates, in a completely randomized design. The post-harvest quality, after fermentation, was evaluated based on their physicochemical characteristics. Irrigation water salinity negatively affected the average length, average weight, titratable acidity, soluble solids/titratable acidity ratio, and pH of the okra fruits. Potassium doses increased the average diameter of okra fruits, minimizing the deleterious effects of irrigation water salinity. The vitamin C contents of pickled okra fruits were not compromised by salt stress. Among the lactic fermentation brines, the formulation containing the proportion NaCl:CaCl2 stands out as promoting the highest titratable acidity and soluble solids content in pickled okra fruits.

scholarly journals Effect of water salinity and potassium doses on physiological traits and growth of ‘Embrapa 51’ precocious dwarf cashew (Anacardium occidentale L.) rootstock

2020 ◽  
pp. 1748-1755
Author(s):  
Geovani Soares de Lima ◽  
Jailson Batista da Silva ◽  
Lauriane Almeida dos Anjos Soares ◽  
Reginaldo Gomes Nobre ◽  
Hans Raj Gheyi ◽  
...  
Keyword(s):  
Salt Stress ◽  
Photosystem Ii ◽  
Saline Water ◽  
Block Design ◽  
Photochemical Efficiency ◽  
Water Salinity ◽  
Carotenoid Content ◽  
Potassium Fertilization ◽  
Randomized Block Design ◽  
Salinity Levels

In the semiarid regions, plants are constantly exposed to different conditions of abiotic stresses due to the occurrence of excess salts in both soil and water. Thus, it is extremely important to identify an alternative capable of minimizing the effects of salt stress on plants as a way to ensure the expansion of irrigated areas. In this context, this study aimed to evaluate the chloroplast pigments, photochemical efficiency and growth of ‘Embrapa 51’ precocious dwarf cashew as a function of irrigation with saline water and potassium fertilization in the rootstock formation stage. The study was conducted under greenhouse conditions in the municipality of Pombal, PB, Brazil, using a randomized block design in a 5 x 2 factorial scheme, corresponding to five levels of irrigation water electrical conductivity - ECw (0.4; 1.2; 2.0; 2.8 and 3.6 dS m-1) and two doses of potassium fertilization - KD (100 and 150% of the recommendation corresponding to 150 and 225 g K2O kg-1 soil), with two plants per plot and three replicates. Water salinity from 0.4 induced reductions in chlorophyll a and b synthesis, maximum and variable fluorescence and growth in sexually propagated precocious dwarf cashew seedlings and increases in carotenoid content and initial chlorophyll fluorescence. The quantum efficiency of photosystem II in cashew plants was decreased sharply with the increment in water salinity levels, standing out as indicative of damage to the photosystem II reaction centres. 'Embrapa 51' precocious dwarf cashew plants can be classified as sensitive to water salinity above 0.4 dS m-1. Potassium doses of 100 and 150% of the recommendation did not alleviate the effects of salt stress during the precocious dwarf cashew rootstock production phase.

scholarly journals Cell damage, gas exchange, and growth of Annona squamosa L. under saline water irrigation and potassium fertilization

2021 ◽  
Vol 42 (3) ◽  
pp. 999-1018
Author(s):  
Eliene Araújo Fernandes ◽  
◽  
Lauriane Almeida dos Anjos Soares ◽  
Geovani Soares de Lima ◽  
Alzira Maria de Sousa Silva Neta ◽  
...  
Keyword(s):  
Salt Stress ◽  
Gas Exchange ◽  
Cell Damage ◽  
Block Design ◽  
Stem Diameter ◽  
Northeastern Brazil ◽  
Limiting Factor ◽  
Water Saturation Deficit ◽  
Potassium Fertilization ◽  
Custard Apple

The semi-arid region of Northeastern Brazil has water limitations in terms of both quantity and quality, with salt stress as a limiting factor for increasing yield in most crops. In this context, the present study aimed to evaluate cell damage, gas exchange, and growth of custard apple under salt stress and potassium fertilization. The research was carried out at the Experimental Farm of CCTA/UFCG, in São Domingos-PB, Brazil. A randomized block design was arranged in a 2 × 5 factorial scheme, with two levels of electrical conductivity of irrigation water (ECw; 1.3 and 4.0 dS m-1) and five potassium doses (10, 15, 20, 25, and 30 g of K2O per plant per year). Water salinity of 4.0 dS m-1 negatively affected the stem diameter and number of leaves in custard apple at 179 and 210 days after transplanting (DAT). The highest relative growth in stem diameter in the period of 179-245 DAT was obtained in plants irrigated with 4.0 dS m-1 water and fertilized with 20 g of K2O per plant. Potassium doses of up to 30 g of K2O resulted in a higher percentage of cell damage and relative water content in custard apple leaf tissue. Water saturation deficit decreased with the increase in K2O doses in plants irrigated with water of 1.3 dS m-1. Irrigation with 1.3 dS m-1 water and estimated K2O doses ranging from 16 to 22 g per plant resulted in an increase in stomatal conductance, transpiration, CO2 assimilation rate, and instantaneous carboxylation efficiency in custard apple plants at 210 DAT.

Sign in / Sign up

Export Citation Format

Share Document