Effectiveness of soil conditioners to enhance salt extraction ability of Salicornia ramosissima in saline-sodic soil for different soil moisture contents

• Published in: International journal of phytoremediation 2022, Vol.24 (5), p.447-455
• Main Authors: Pessoa, Luiz Guilherme Medeiros, Silva, Luiz Filipe dos Santos, Freire, Maria Betânia Galvão dos Santos, Ferreira-Silva, Sérgio Luiz, Green, Colleen Heather Machado, de Melo, Hélio Fernandes, Fernandes, Josimar Gurgel, Freire, Fernando José
• Format: Article
• Language: English
• Subjects: Biodegradation; Biodegradation, Environmental; Chenopodiaceae - metabolism; Dry matter; Environmental degradation; Field capacity; Gypsum; Halophytes; Moisture effects; Organic matter; Phytoremediation; Plant extracts; Plant tissues; Salicornia; Saline soils; Salinity; Salt; Salts; Semi arid environments; Semiarid environments; Sodic soils; Sodium Chloride - metabolism; Soil; Soil conditioners; Soil conditions; Soil degradation; Soil moisture; soil reclamation; Soil salinity; Sulfur; Transfer factor
• ISSN: 1522-6514; 1549-7879
• DOI: 10.1080/15226514.2021.1952924

Soil salinity is considered one of the main types of soil degradation in semiarid environments around the globe. This work aims to evaluate the effectiveness of soil conditioners to enhance the growth and salt extraction ability of Salicornia ramosíssima for different soil moisture contents. Salicornia plants were cultivated in pots in which the soils were treated with the following conditioners: control; gypsum + organic matter; elemental sulfur + organic matter; and gypsum + elemental sulfur + organic matter. Salicornia plants were subjected to two soil moisture rates - at 35 and 85% field capacity. Soil conditioners associated with higher contents of soil moisture promoted significant increases, compared to control, in fresh (6.20 − 11.13 g) and dry matter (1.20 − 2.07 g), relative biomass (100 − 179%) as well as significantly increased the concentrations of Na + (56.09 − 65.64 mg kg −1 ) and Cl - (110.83 − 150.0 mg kg −1 ) in plant tissues. Soil conditioners significantly increased salt extraction ability under the two moisture levels, mainly by promoting higher values for both transfer factor and phytoremediation potential. The best performance of Salicornia in terms of plant yield and salt extraction, regardless of the moisture level, was the gypsum + organic matter. Novelty statement There are no studies in the literature relating the use of conditioners as a strategy to enhance Salicornia's ability to extract salts. This work contributes to the management of salinized areas around the globe in two main aspects. The first is that many of these salt-degraded areas are desertified and through this study, it is possible to revegetate and recover them. The second one is that, since Salicornia is a plant with economic value, this can serve as an incentive for farmers to grow Salicornia in saline areas.