Fish farm wastewater can feed blackberries and boost their defenses
Aquaponics
If you garden in a dry region or run a backyard aquaponics setup, this suggests your fish tank runoff could water fruit plants without wasting nutrients or stunting growth.
Researchers in a dry part of Mexico hooked up a tilapia fish tank to a blackberry growing system and watched what happened when they used the fish-tank water to irrigate the plants. Blackberries watered with fish water plus a bit of extra mineral fertilizer grew just as well as those on standard plant food, while fish water alone pushed the plants to ramp up their own antioxidant and defense chemicals, like they were responding to a mild challenge rather than a full meal. It's a promising sign that recycling aquaculture water could stretch scarce water and fertilizer supplies for fruit crops.
Key Findings
Blackberries irrigated with mineral-supplemented tilapia effluent matched conventional nutrient solution in growth and canopy greenness over the 216-hour trial.
Unsupplemented tilapia effluent and well water triggered stronger antioxidant responses, notably higher superoxide dismutase and catalase activity plus shifting phenolic and flavonoid levels.
Phenylalanine ammonia-lyase activity rose more weakly and later, suggesting a distinct, delayed secondary-metabolism response to nutrient-limited effluent.
chevron_right Technical Summary
Growing blackberries with fish-farm wastewater (from tilapia ponds) worked nearly as well as standard fertilizer when nutrients were topped up, while plain fish wastewater triggered the plants' natural stress-defense chemistry instead of just feeding them.
Abstract Preview
Original paper
Organically enriched water from an integrated agri-aquaculture system enhances antioxidant defense and secondary metabolism in blackberry (Rubus ulmifolius cv. Tupy)
Introduction Integrated agri-aquaculture systems can improve water-use efficiency and nutrient recycling in semiarid and arid regions increasingly affected by climate change; however, the physiolog...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Gene editing removes 97% of celiac-triggering proteins from bread wheat
It could mean that people with celiac disease — roughly 1 in 100 worldwide — may one day safely eat bread made from real wheat, without sacrificing the taste...
The blackberry is an edible fruit produced by many species in the genus Rubus in the family Rosaceae, hybrids among these species within the subgenus Rubus, and hybrids between the subgenera Rubus and Idaeobatus. The taxonomy of blackberries has historically been confused because of hybridization...