Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions

Abstract

Brackish waters may vary in their chemical compositions, interfering with different plant responses to stress; therefore, the present study aimed to evaluate the production components of parsley plants subjected to levels of electrical conductivity in nutrient solutions with an initial ECns of 1.58 dS m-1, which was solubilized in water with the following water electrical conductivity configurations (ECw): 0.12 (control), 1.12, 2.12, 3.12, 4.12 and 5.12 dS m-1, resulting in six isosmotic levels (ECns = 1.7, 2.7, 3.7, 4.7, 5.7 and 6.7 dS m-1) in an interaction with four types of salt: NaCl, CaCl2, MgCl2 and KCl. The experimental design was completely randomized in a factorial scheme with five replicates. Two strategies were used to restore the volume consumed by the parsley plants, and the replacement was made with municipal-supply water (ECa = 0.12 dS m-1) in the first strategy and with the respective brackish waters in the second strategy. The total fresh and dry weights of the shoots and roots were evaluated as well as the total dry mass percentage of the shoots and roots. The responses of the plants to the different cationic natures was more evident at the highest levels of electrical conductivity tested, and the use of municipal-supply water to replace the evapotranspired depth mitigated the deleterious effects of salinity. In addition, greater reductions were observed in the fresh and dry mass when the replacement of the volume consumed was with the brackish waters.

Morpho-Anatomical and Physiological Responses Can Predict the Ideal Period for the Transplantation of Hydroponic Seedlings of Hymenaea courbaril, a Neotropical Fruit Tree

“…Given this, any reduction in the SD, which is reflected in a decrease in the transpirational flux (e.g., [ 43 , 44 , 45 ]), may help the plant to avoid the potentially damaging effects of high ion concentrations in hydroponic systems. A number of studies have shown that plants cultivated in these systems are more able to adapt to conditions of high salinity than plants cultivated using conventional methods [ 46 ], which may reflect a potential for the use of brackish water, or even seawater in hydroponic systems (e.g., [ 47 , 48 , 49 , 50 ]). This adaptation may be related directly to the anatomical and physiological adjustments observed in the H. courbaril seedlings in the present study.…”

Biomass and essential oil production of basil at recirculation intervals of nutrient solutions prepared with treated domestic effluents

“…The DFT system adapted to tubes has been used to cultivate different crops, such as coriander (Silva et al 2016b;Silva et al 2018;Silva et al 2020b), ornamental sunflower (Santos Júnior et al 2016bc;Souza et al 2020), lettuce (Cova et al 2017;Freitas al. 2021), bell pepper (Furtado et al 2017), rocket (Campos Júnior et al 2018, endive (Alves et al 2019a;Silva et al 2020a), basil (Alves et al 2019b;Azevedo Neto et al 2019;Gonçalves et al 2019;Alves et al 2021), chives (Silva Júnior et al 2019), and parsley (Martins et al 2019).…”