Combined culture method of fresh water grass carps
A breeding method and a combined technology, applied in the field of high-efficiency and environment-friendly breeding, can solve the problems of grass carp feeding habits, incompatibility of digestive physiology, nutrition and metabolism, etc., so as to reduce low dissolved oxygen stress, increase visual disturbance, and prolong feeding time. Effect
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Embodiment 1
[0035] The present invention proposes a combined culture method for freshwater grass carp. The culture method focuses on the scientific feeding of feed, including a series of combined optimization according to different growth stages of grass carp with different nutritional components, product form, product particle size and water quality control. , this method not only improves the effective utilization rate of fish for feed, controls the cost of breeding, but also is an effective way to realize the sustainable development of aquaculture.
[0036] In this example, the weight of grass carp is fully considered, and feeds with different nutritional components and product forms are used for feeding. The breeding method is as follows: 2-50 g of grass carp is fed according to the weight of the fish, with a protein content of 32% and a particle size of 1.0 mm. For 50-250 g grass carp, feed with 30% protein content and 2.0mm particle size; for 250-750 g grass carp, feed with 28% prote...
Embodiment 2
[0038] The difference between this embodiment and Example 1 is that the feed involved in this embodiment is composed of sinking hard pellet feed and buoyant extruded feed. It is 0.8:1.
Embodiment 3
[0040] The difference between this example and Example 2 is that in this example, the feeding method is 4 times a day, 20 minutes each time, and 2 hours between each time.
[0041] Wherein, each feeding step of the feed is as follows:
[0042] A: 3 minutes before feed feeding, feed floating extruded feed every 10s,
[0043] B: After the fish are concentrated, feed the sinking hard pellet feed every 6s,
[0044] C: 4 minutes before the end of feeding, feed the floating extruded feed every 10s.
[0045] The advantage of adopting the above-mentioned feeding method is that following the "slow-fast-slow" and "less-more-less" feeding method, it is convenient to observe the concentration of fish and prevent fish from not concentrating or feeding too much after eating and dispersing. Feed waste.
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