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Fish farming season feeding technology
The food intake and its metabolic intensity of fishes change with the change of water temperature. Four seasons feeding technology for fish farming is based on the fish species, growth status, seasonal changes, disease epidemics, etc. . Feeding in one year should adhere to the feeding principle of “early start eating, catching the middle, and stopping lateâ€. The specific requirements are as follows: 1. Early in the winter and spring season, the water temperature is low, and fish do not eat basically. It is not possible to feed bait, but on sunny days without wind, when the water temperature rises to 15°C, appropriate amount of bait should be fed in a timely manner, which is the feeding principle of early-opening diets.The rainy season (in late April), the water temperature As a result of the gradual increase, the food intake of fish increases, and the amount of feed increases.Secondly, during the middle of summer (July, August, September), the water temperature often reaches around 30°C. In the case of clear weather and water quality assurance, It can feed a lot of bait, especially for herbivorous fish, which needs to feed more and more vegetal food. It can exchange high-quality fish protein with cheap vegetable protein, which has low production cost and good economic benefit. This period is a period of rapid growth of fish. , It is also the season of fish disease. When the weather changes, the disease is predicted to occur, or the fish floats, the amount of feed or stop feeding should be controlled, and new water should be added to improve the water quality. This is to catch the middle feeding. Principles: Third, the late autumn crisp season, After the autumnal equinox (at the end of September), the water temperature gradually decreases, but it is still maintained at 20 °C - 25 °C. At this time, the living environment is suitable for fish growth, and the growth rate is fast, and can continue to increase the amount of feeding, let it After eating in winter (mid-November and mid-November), the temperature of the water gradually decreases, but the fish still need a small amount of food, and they should also catch the appropriate amount of feed at sunny noon in order to ensure that the fish body grows longer and the yield increases. The winter survival rate, which is the principle of feeding in the late-freezing season.At any time of the year, no matter which season, pay attention to the following aspects in the feeding method: 1. Four seasons feeding must adhere to the principle of “Four Ding†timing: Every day feeding The time must be punctual and not arbitrarily changed.When the water temperature is below 20°C, feed 1 to 2 times a day, when the water temperature is above 20°C, feed 3-4 times a day, and the feeding time is arranged between 8-18 hours. Fixed point: Feed on a fixed food table, set 1-2 feeding ponds below 5 mu, and 3-4 feeding spots above 5 mu, which is good for grabbing food and eliminating bait in fish clusters. Quality: High-quality bait has a comprehensive nutrition, scientific and reasonable formula, suitable particle size, It has good stability, low feed coefficient, etc. According to the fish species and nutrition requirements in different growth stages, it is necessary to achieve the combination of fineness and greenness, not only to select feeds that are not mildewy, but also to ensure the high quality foods needed for the growth of fish nutrition, but also Must have hunger and palatability Quantitative: According to the season, weather, water color and eating conditions, reasonable feeding, to implement the principle of small meals, usually eat about 2 hours, or 80% of the fish finished If you walk, it means that the amount is almost the same, you should reduce, feed, or stop feeding.The quantitative feeding can also be calculated by the following methods: Annual feeding amount: calculated based on the fish net weight gain and the feed coefficient. Fish stocking x net weight gain x feed rate General fish net weight gain multiple of 4-5.Fish coefficient: refers to the weight of the feed consumed when the fish body increases unit weight.The full-price compound feed bait coefficient is 2-23 The mixed feed is 3-3.5. If it is used alternately for several feeds, the use amount is calculated based on their respective feed stocks, and then added together is the total annual feed. Monthly Feeding: This is the annual feed amount x percentage of the month's feed allocation. Daily feeding: According to the monthly feeding amount divided into upper, middle and lower third trimmings, the first half of the month is the average of 80% of the monthly feeding amount, the average for the middle and 120% of the average for the end of the month, starting from September The amount of daily feed in the first half of the year is the opposite, that is, 120% of the average in the early days and 80% in the latter half of the year. The number of daily feedings can also be determined according to the number of fish ponds. When the water temperature is 15%-20%, the daily feeding amount is 1%-3% of the fish's body weight. When the water temperature is above 20°C, the daily feeding amount is The fish's weight is 3%-5%. This method must often accurately measure the fish body weight in the pond, which is more troublesome and has greater errors. It is more convenient and convenient to determine the daily feeding amount according to the fish's feeding conditions. Generally, it takes 2 hours to finish eating. The above calculation is only an empirical summary. It is a guiding concept. The actual amount of feed per day depends on the specific circumstances of fish activities, food intake, weather, and water. Second, early open diet insisted on domestication and feeding fish for domestication and feeding, can reduce feed wastage and improve utilization. 1, preparation: domestication before the 1-2 days of food. 2. Site selection: Feeding sites should be selected in a quiet, easy-to-feed place. 3, operation: tapping on an object during domestication, issued a sound (every 10 seconds), so that fish form conditioned reflex. Each hit, feed some food. Domestication 2-3 times a day, each time not less than 30 minutes, 5-7 days of domestication, can normally feed on food. During domestication, feeding points should not be changed at random, and domestication time must be ensured.