Gu Yu came. Gu Yu is the last festival of spring, and as soon as the festival is over, it will enter early summer. During the rainy season, the temperature gradually rises, and some areas in the south have obviously felt that the weather is starting to heat up. In the past few days, it has rained in some places, the rain has moisturized everything, and agricultural production will also set off a climax. Aquaculture will also enter the peak period of seedling release, breeding and feeding, hoping that after a year of hard farming, it will be able to increase production and income.
At present, there are many fish breeds, the breeding area and output are stable, not only the bulk freshwater aquaculture varieties have been consolidated, but also the famous and excellent breeding varieties are also developing and growing, and constantly meet the people's demand for beautiful aquatic products. Among them, rainbow trout is loved by the majority of farmers and consumers. Here is a brief introduction to the breeding characteristics of rainbow trout, for your reference.
<h1 class="pgc-h-arrow-right" > the reason why rainbow trout is favored</h1>
In terms of breeding, rainbow trout is an imported breed, and it has been cultivated in many regions after its introduction. The reasons for this: First, rainbow trout is less sick, easy to breed, can improve the efficiency of breeding; second, rainbow trout produces high meat, which can improve production and enable farmers to obtain benefits.
From the perspective of consumption, one is that the rainbow trout meat is of good quality and can be made into sashimi, so that more consumers in the inland taste the taste of sashimi and are loved by consumers; the second is that rainbow trout is rich in nutrition and is a high-quality protein supply, and the fish fillets and grilled fish fillets are suitable for children and the elderly.
<h1 class= "pgc-h-arrow-right" > several farming characteristics of rainbow trout</h1>
(1) Rainbow trout prefers water with high oxygen content, flow and freshness
Rainbow trout likes to flow water, and the water quality should be fresh. The flowing water body is rich in oxygen content, which can meet the high oxygen content needs of rainbow trout. Therefore, we use the flowing water culture mode for rainbow trout. We know that the gills of fish are important organs for their life activities. The gills of rainbow trout are most afraid of encountering mud and debris, so the breeding water source is best with spring water and mountain stream water, because this type of water body basically has no sludge impurities, fresh water quality, and meets the living needs of rainbow trout. Since flowing water aquaculture needs to ensure the supply of water, when choosing a water source, it is necessary to pay attention to whether the water source will dry up in winter, which is contradictory to whether agricultural production such as rice competes for water.
In addition, to ensure good water quality, the design of fish ponds is also crucial. In general, fish ponds are built in circular or rectangular shapes. These two shapes of fish ponds are not only conducive to the discharge of water, but also convenient for the cleaning and discharge of mud in fish ponds. Fish ponds are best leveled with cement, so that they are clean and easy to clean.
(2) The most suitable growth temperature for rainbow trout is between 15-20 ° C
Rainbow trout is a cold-water fish that cannot adapt to too high temperatures, but too low water temperatures are equally detrimental to its growth. The growth of organisms is related to the metabolism in the body, metabolism and temperature, and the appropriate temperature can accelerate metabolism and promote growth and development. Under certain conditions, rainbow trout can adapt to water temperatures of 0-28 ° C, but the most suitable water temperature is 15-20 ° C. Being too low and too high can cause rainbow trout to lose appetite, slow down their activity, and even die. Therefore, the water source of the cultivated rainbow trout should have a suitable water temperature, and the water temperature of the whole year cannot change too much, and it is best not to be lower than 8-10 ° C in the low temperature period such as spring and winter, and not to exceed 25-28 ° C in the high temperature period such as summer and autumn. As we mentioned above, spring water is suitable for raising rainbow trout, but also because the temperature of spring water is stable. Spring water comes out of the ground, the temperature in summer and autumn will not be too high, and the spring and winter will not be too low. If you use other water sources to raise fish, then you should pay special attention to the temperature of the water in the four seasons. If the water temperature is too low or too high, warming or cooling measures should be taken.
(3) Rainbow trout has the best appetite in the early morning and evening
I learned it from a farmer who has been running a farm for over a decade. He farms sturgeon, rainbow trout and golden trout, and he told me that he feeds rainbow trout three times a day, but feeds the least at noon, and the most in the early morning and evening. In fact, after thinking about it, this has a lot to do with the water temperature mentioned above. In some places, the water temperature is higher at noon, and the most suitable temperature for rainbow trout is 15-20 ° C, and the water temperature is too high, its appetite will decrease. This is also the use of its characteristics of water temperature requirements for aquaculture.
(4) Pay attention to the maintenance of the liver and gallbladder of rainbow trout
Rainbow trout is a carnivorous fish, the protein requirement for bait is 40%-45%, and it is generally fed with a compound feed when it is reared. However, like other carnivorous fish, if rainbow trout ingests too high fat, carbohydrates, and proteins in food, it will accumulate fat in the body, especially in the liver, which is harmful to the liver of the fish. This is the same as people getting fatty liver. Therefore, when breeding rainbow trout, we should also pay attention to the maintenance of fish liver, and regularly feed liver-protecting choleretic bait.
<h1 class="pgc-h-arrow-right" > other farming precautions</h1>
(1) Select high-quality feed
As mentioned above, rainbow trout is a carnivorous fish, and the protein content of the selected feed should be 40%-45%, and the other nutrients of the feed should be rich and balanced. Do not choose inferior, nutritional value is not high feed, inferior feed palatability is poor, on the one hand, rainbow trout do not like to eat, on the other hand, it will bring too much residual bait to the fish pond, which is not conducive to the health of the fish body, but also not conducive to the maintenance of the water environment of the fish pond.
(2) Do a good job of anti-escape facilities
Rainbow trout are good at jumping and can escape against the water source, and I often see rainbow trout in the stream outside the fish pond of friends. Don't underestimate these escaped rainbow trout, if a fish pond escapes an average of 1 fish per day, it is also an incredible number in a year. The inlet of the flow pond is best set up to be about 0.5--1 meters higher than the fish pond, and the outlet of the fish pond should be equipped with a dense eye net and an iron fence to set up anti-escape facilities.
(3) Prevent trash fish from entering the fish pond
Wild miscellaneous fish such as carp, crucian carp, tilapia and wheat ear fish in the stream will enter the fish pond with the water source and compete with rainbow trout for food. A net pocket should be set up at the inlet of the water, which can not only intercept debris such as branches and leaves, but also prevent wild trash fish from entering the fish pond. Another hazard of wild trash fish is that they will bring germs and infect rainbow trout diseases, which also requires us to prevent wild trash fish from interfering with aquaculture and production.