News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.

Julio F. Queiroz

Responsibility

Pond bottom dry-out and liming, part 2

The authors believe that dry-out periods likely destroy most organisms in pond bottoms, and liming of the entire bottom area should be done only to neutralize soil acidity and increase pH for organic matter decomposition by soil microorganisms. 

Responsibility

Pond bottom dry-out and liming, part 1

The main pond bottom soil management practices used in semi-intensive culture are pond dry-out and liming between crops. These practices accelerate organic matter decomposition, neutralize soil acidity and destroy unwanted organisms. 

Responsibility

Nitrogen and phosphorus loads vary by system

Adding nitrogen and phosphorus to natural waters can cause eutrophication. Discharge of these nutrients from aquaculture operations is under U.S. government evaluation.