(1) Choose high-quality and low-priced pellet feeds. On the one hand, good feeds have a low feed conversion rate (high feed conversion ratio); on the other hand, fishes have high growth rate, good constitution, strong disease resistance, and high feed utilization rate. The pollution to the water is light. Although grass carp is a herbivorous fish, it is particularly fond of eating compound feed. Formulated feed has the advantages of comprehensive nutrition, light water pollution, and fast fish growth, which is the key to obtain high yield and stable yield. Too much fodder to feed, easily pollute the water, resulting in frequent diseases. Appropriate feeding of part of the grass can increase the crude fiber content in the feed, and supplementing some of the vitamins can reduce the incidence of hepatobiliary syndrome.
(2) According to the different growth stages of grass carp, select the suitable protein content of feed. Appropriate protein content in the fingerling stage is about 30%, and the suitable protein content in the adult stage is 25%-26%. Grass carp ingestion of high protein feeds can easily lead to fatty liver, triggering hepatobiliary syndrome. Autumn is a season of aging and dry season of various grasses. The cellulose content of forage is increased, and the water and nutrients are reduced. Grass carp eats such grass not only has no nutrition, but will increase intestinal peristalsis and cause diseases mainly caused by enteritis. Therefore, by the fall, we should stop feeding grass and feed pellet feed.
(3) Feeding and mastering 80% fullness. Because grass carp is particularly bulimia, especially about 250 grams of grass carp, eating too much fish easily leads to incomplete feed digestion. Increased feed conversion rate can easily lead to outbreaks of fish diseases such as enteritis, and it is generally recommended to feed only 6 to 70% of full-fat during the hot season.
(4) Create a healthy water ecological environment. Water quality conditions have a great impact on grass carp farming. Feeding on compound feeds throughout the course will cause more water to excrete, which will cause water deterioration. Therefore, water quality should be tested regularly to fully understand the time for opening the aerator, and it will be open at noon on sunny days. The cloudy day begins early in the morning and rainy days begin at midnight in the rainy days. The sultry weather is not interrupted. It is not open in the evening. Water quality can also be improved by changing water and applying pesticides. The above four measures can ensure grass carp breeding can obtain stable yields and high yields, and can also save costs to a certain extent, thereby indirectly increasing the breeding efficiency.
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