Detailed Explanation of Key Points in Yellow Catfish Rearing and Management Techniques

1. Pond Clearing and Disinfection

After stocking the pond for 7-10 days, use quicklime at 150 kg-200 kg/667 sq m for dry pond disinfection to eliminate pathogenic organisms and predators.

2. Feeding and Fertilization

The pond is equipped with feed and fertilizer according to the annual production plan. The feed is mainly sinking pellet compound feed or extruded feed, and the “four fixed” feeding method is adhered to, specifically: the daily feeding amount of concentrated feed is 2%-3% of the pond fish body weight before May, 4%-5% from May to June, and 6%-8% from mid-June to the end of September, fed once each day at 9:00-10:00 am and 4:00-5:00 pm; the fertilizers applied include organic fertilizers such as manure and green grass, and chemical fertilizers such as ammonium bicarbonate, urea, and phosphate fertilizer, and the “three observations” fertilization method is adhered to, with organic fertilizer mainly applied during low-temperature periods and chemical fertilizer mainly applied during high-temperature stages, and the supplementary fertilizer amount is determined specifically according to water quality conditions.

3. Water Quality Regulation

New water is frequently added to the pond. During high-temperature seasons, water is changed 1-2 times every 30 days to maintain pond water transparency at 30 cm-35 cm. In addition, each pond is equipped with 1 aerator, which is frequently turned on to increase oxygen, raise dissolved oxygen in the water, avoid fish surfacing or pond turnover, and quicklime is regularly applied to improve water quality and regulate pH value.

4. Fish Disease Prevention and Control

Adhere to the principle of prevention first, hang bags and baskets at feeding grounds, disinfect feed, water bodies, feeding grounds, tools, etc. with drugs, and adopt methods combining external medications with oral medications for prevention, and treat fish diseases early when discovered.