There are two types of fish food sources: one is natural food, and the other is artificial feed that is artificially produced according to the nutritional needs of fish. In the current large-scale farming conditions, artificial compound feed has become an important source of nutrients needed for growing fish. However, in the face of the current wide variety of artificial compound feeds, how to select feedstuffs and adopt scientific feeding methods to obtain the best economic benefits is a concern for every farmer. Now we have a few questions on the use of feed in aquaculture. Point of view for your reference.
First, the relationship between the cost of breeding and the price of feed The proportion of the cost and culture of an average of 40% -50%, as high as 65%. Therefore, it is very important for farmers to obtain better economic benefits and reduce feed costs. Some people tend to think that feed prices are low, investment is low, and costs are low. This is especially true in economically underdeveloped regions. However, the use of feeds is not the case. See the formula below.
Unit Fish Yield Feed Cost = Feed Rate Feed Price
From this we can see that the feed cost per unit of fish production is determined by the bait factor and the feed price, and there are two options when choosing feed:
A feed rate is higher, but feed prices are lower.
B has a low feed rate, but the price is higher.
Second, the relationship between feed quality and growth rate Assuming a baiting rate of 4% of the case, a 1000 kg fish pond as an example, feeding the case of A, B feed.
A feed bait material 1.85, then the daily gain (10004%) / 1.85 = 21.62 kg.
B feed feed coefficient of 1.25, then the daily gain (10004%) / 1.25 = 32 kg.
1. The same growth for 100 days, A feed 2162 kilograms of long fish, B feed can be 3200 kilograms of long fish, more than A feed fish 1038 kilograms. 2. With the same increase of 2162 kg, A feed needs 100 days, then B feed only 67.6 days (2162 kg 32 kg/day), 32.4 days less than A feed.
That is, at the same time (100 days), the B feed had 1038 kg more fish than the A feed. When the same weight gain, B feed can save 32.4% of the time than A feed.
Third, the amount of feeding and feeding methods Feeding amount. According to the species stocking size, quantity, planned growth factor of the fish eaten, and the bait factor.
Namely: Feeding amount = stocking weight increase multiple feed coefficient
In order to calculate the total amount of food needed for the whole year, in order to arrange the annual drink plan and funds, avoid capital and feed gaps and make preparations as soon as possible. Generally, the peak of growth is 7, 8, and 3 months. The amount of feeding accounts for 65% of the whole growth process. During this time, it seizes the opportunity to provide enough food to ensure the normal growth of the fish.
2. Japanese investment. Calculated according to the planned feeding amount and the proportion of each month, it can also be calculated according to the fish's increasing body weight of 1% to 5%, and the monthly average feeding amount is obtained. Generally, the average amount is the mid-term, and it is less in the early days. It will be more late in the day.
3. Date and time of feeding. Summer fry, the water temperature is higher, the individual is smaller, the number of daily feeding should be not less than 5 to 6 times, from July to September, the fish eat the most prosperous, the fastest growing period, the number of daily feeding should be 4 to 5 times. After October, as the water temperature decreases, the number of feedings gradually decreases until the fish no longer feed. Each feeding time is not less than 20 minutes, in order to ensure that the fish eat 80% full without waste on the principle.
4. Feeding principles and methods. Balance, foot, and good are the general principles. Evenly, according to the requirements of the fish, feed it evenly every day. This will not only prevent diseases and ensure normal growth, but also increase the efficiency of the use of baits. The sufficient amount of feed is to meet the needs of fish. Well, it is the bait. High quality, nutrition, palatable, fresh and so on.
Timing, quantification, and positioning are the basic methods of feeding. At the same time, the frequency and quantity of feeding are determined flexibly in combination with the weather, water quality, fish eating, and activities.
To sum up, to achieve good economic benefits in aquaculture, the use of feed depends mainly on quality, rather than price (of course, better quality and cheaper). In the case of superior capital and growing conditions, farmers should use high-quality feed and adopt scientific feeding methods.
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