Here is something:    https://selectree.calpoly.edu/tree-detail/rhus-lancea "Tree Site Conditions & Constraints Sunset Zones 8, 9 and 12 - 24.   USDA Hardiness Zones 9 - 11.   Exposure Full Sun to Partial Shade. Moist to Dry Soil. Drought tolerant. Clay, Loam or Sand Texture. Slightly Acidic to Highly Alkaline Soil pH. Salinity Tolerance is Moderate on Coast. Seaside Tolerance is Good in Mild Zone."   Salt tolerance is parallel to drought tolerance, as salt modifies the osmotic pressure, what's having an influence on active matter transport through cell walls. So basically plants that can grow in water (low ORP) and high salinity (high TDS) are fit for your needs. Now what you need to find out is what does the people living in nearby coastal and lagoon areas give as a fodder to their beasts?  By the way, grey mangrove might be an option, too, alhough it is not always edible:  http://www.fao.org/docrep/010/ai387e/AI387E06.htm  "Avicennia marina (Forssk.) Vierh. AVICENNIACEAE Common name: Grey mangrove Dhivehi name: Baru (...) Uses: Leaves are considered as one of the best fodder for camel. Cattle also feed on shoots and leaves during the rainy season when the salt content is low in the leaves."   https://en.wikipedia.org/wiki/Avicennia_marina   Regards,    László

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Here is something: 

 

https://selectree.calpoly.edu/tree-detail/rhus-lancea

"Tree Site Conditions & Constraints

Sunset Zones 8, 9 and 12 - 24.

 

USDA Hardiness Zones 9 - 11.

 

Exposure Full Sun to Partial Shade.

Moist to Dry Soil.

Drought tolerant.

Clay, Loam or Sand Texture.

Slightly Acidic to Highly Alkaline Soil pH.

Salinity Tolerance is Moderate on Coast.

Seaside Tolerance is Good in Mild Zone."

 

Salt tolerance is parallel to drought tolerance, as salt modifies the osmotic pressure, what's having an influence on active matter transport through cell walls. So basically plants that can grow in water (low ORP) and high salinity (high TDS) are fit for your needs. Now what you need to find out is what does the people living in nearby coastal and lagoon areas give as a fodder to their beasts? 

By the way, grey mangrove might be an option, too, alhough it is not always edible: 

http://www.fao.org/docrep/010/ai387e/AI387E06.htm 

"Avicennia marina (Forssk.) Vierh. AVICENNIACEAE Common name: Grey mangrove Dhivehi name: Baru (...) Uses: Leaves are considered as one of the best fodder for camel. Cattle also feed on shoots and leaves during the rainy season when the salt content is low in the leaves."

 

https://en.wikipedia.org/wiki/Avicennia_marina

 

Regards, 

 

László