Winter winter pond management is mainly in the following aspects:
One, the morning and evening tour ponds, found that sick fish should be picked up in time;
Second, to maintain a high water level, the water depth should be above 1.8m;
Third, the water quality should have a certain amount of fertilizer, transparency to maintain 30-40cm, manure 150kg / acre every 10-15 days, or 1.5kg of carbon ammonia per acre plus 1.5kg of calcium phosphate;
4. Inject fresh water once every 10-15 days, each time filling 10cm.
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