Aquaponics integrated by lettuce hydroponics and loach aquaculture in CELSS
Abstract
In aquaponics systems integrated by hydroponics and aquaculture, re-use of water and balance of nutrient elements are sustained between both cultures, using dissolved elements in feces from fish for plant growth. In order to operate aquaponics (lettuce hydroponics and loach aquaculture) in Controlled Ecological Life Support Systems, we evaluated possibility that dissolved elements in excretion from loach substitute nutrient elements for lettuce plants. We analyzed growth performances of lettuce and loach, and balance of nutrient elements especially for nitrogen between input and output of the whole system and nitrogen flow in the system. As a result, lettuce grew in aquaponics with a standard solution _ 0.5 as well as hydroponics with standard solution. In nitrogen balance, almost all nitrogen supplied to the system was used by growing lettuce and about quarter nitrogen contained in the feed was accumulated in loach. However, some elements from feces didn't contain completely all required elements for lettuce growth.
- Publication:
-
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018
- Bibcode:
- 2018cosp...42E1764K