Agri Kultuur March/ Maart 2016 - Page 26

Henk inspecting the basil fish excreta. Soluble excreta are mainly ammonia and is the most available mineral until it is successively transformed into nitrite and nitrate by nitrifying bacteria. Both uneaten feed and solid faeces need to be solubilized from organic material to ionic mineral forms that are easily assimilated by plants. Minerals have different solubilisation rates and do not accumulate equally, which influences their concentrations in the water. All involved microorg