Job offersmore »

Tweeting Growers

Top 5 - yesterday

Top 5 - last week

Top 5 - last month

Exchange ratesmore »

Nutrient management in aquaponics

Nutrients that are contained in aquaculture effluent may not supply sufficient levels of nutrients for proper plant development and growth in hydroponics; therefore, they need to be supplemented.

To determine the required level of supplementation, three identical aquaponic systems (A, B, and C) and one hydroponic system (D) were stocked with lettuce, mint, and mushroom herbs. The aquaponic systems were stocked with Nile tilapia. System A only received nutrients derived from fish feed; system B received nutrients from fish feed as well as weekly supplements of micronutrients and Fe; system C received the same nutrients as B, with weekly supplements of the macronutrients, P and K; in system D, a hydroponic inorganic solution containing N, Ca, and the same nutrients as system C was added weekly.

Lettuce achieved the highest yields in system C, mint in system B, and mushroom herb in systems A and B. The present study demonstrated that the nutritional requirements of the mint and mushroom herb make them suitable for aquaponic farming because they require low levels of supplement addition, and hence little management effort, resulting in minimal cost increases. While the addition of supplements accelerated the lettuce growth (Systems B, C), and even surpassed the growth in hydroponic (System C vs. D), the nutritional quality (polyphenols, nitrate content) was better without supplementation.

Access the full study at Agronomy

Publication date: 3/8/2018



Other news in this sector:

3/23/2018 Vegetables grown successfully in the International Space Station
3/23/2018 UK: Hydroponics grower developing new greenhouse
3/23/2018 USDA aids hydroponic lettuce growers in Egypt
3/23/2018 UK: Architecture student impresses with vertical farm design
3/22/2018 Asia's largest vertical farm is located in northern Taiwan
3/22/2018 CAN (MB): Hydroponic produce is blooming in the north
3/22/2018 US (AZ): The future of farming takes root
3/22/2018 US (CA): Plenty plans on growing peaches
3/20/2018 Top 5 Advantages of Container Farming
3/16/2018 Brunei invests in high-tech vegetable growing
3/16/2018 South Africa: Young agripreneur joins growing army of urban farmers
3/16/2018 "Nectar Farms and Sundrop Farms are blazing a trail"
3/15/2018 US (MI): Hydroponics benefits mentally-challenged students
3/14/2018 US (GA): Georgia State gets Fulcrum Award for hydroponic farm
3/14/2018 CAN (BC): Affinor Growers expands vertical strawberry production
3/13/2018 US (FL): New restaurant uses hydroponics to go local
3/12/2018 Brunei wants to join high-tech ag revolution
3/9/2018 US (GA): Middle school students learn about aquaponics
3/9/2018 US (GA): Armstrong Aquaponics SARC celebrates anniversary
3/8/2018 The importance of sustainable agriculture in St. Kitts and Nevis