Grower diet

Grower diet provides dynamic growth of the fish during this period and is usually applied following the started diet when carp gains weight of 1.0 to 5.0 g, trout of 30 g, and sturgeon of 30 g. Shift from the starter diet to the grower one is connected with the change of physical structure of the feed from middlings/mini-granules to pellets (extruded feed) and with the change of the nutrient value of the complete food. Fish continues to grow fast during this period. This growth needs support with effective feed nutrition.

Possible issues

• Energy deficit.

• Disproportion of essential amino acids.

• High content of antinutrients.

• Low digestibility of feeds.

• Low growth rate.

• Low survivability.

• High cost of the feed.

Solution in feeding optimisation

Grain and grain-and-legume raw product in complete food contains antinutrients alkyl resorcinols, β-glucans. It is possible to increase the digestibility of the feed consisting mostly of plant products and at the same time destroy the antinutrients with the help of feed enzyme products containing xinalases, β-glucanases, cellulases, pectinases, proteases and other enzymes.

The following diet optimisation program was developed jointly with specialists from Fish Industry Institute RUE of the National Academy of Sciences of Belarus:

• FEKORD-2004 is a liquid emzyme feed additive used for increasing starch digestion, fibre destruction, feed energy nutrition elevation and better digestion. To be used with complete food at a dose of 1 kg per ton.

• FITAZIM is a thermally stable phytase for increasing the use of phosphorus, calcium and other feed nutrients. To be used with complete food at a dose of 1 kg per ton.
  
  
• FEKORD-2012-F is a universal enzyme biocomplex able to destroy major antinutrients and increase feed digestion (energy, protein, amino acids, phosphorus, etc.) It is used in compound feeds in the dosage of 1 kg per ton.   

• TETRABIOTIC-SPK is a probiotic (Bacillus subtilis, Bacillus licheniformis и Enterococcus faecallis). It is used for gastrointestinal tract improvement and disease prophylaxis. To be applied with complete food at a dose of 0,5 kg per ton.

Results of feeding programme application:

• Increased gain in weight by 8%

• Feed consumption per unit of products decrease by 6%

• It is effective in a variety of stress situations caused by high stocking density, increased temperature and re-groupings.

• Increased preservation of young fish and mature fish by 18%.

• Weight gain during growing fish-cultural products

• Toxic infections prophylaxis including those caused by low-quality feed.