Grass carp cultured in cages are sold in batches to increase profits by 210000 a year.

Cage culture is one of the characteristics of grass carp culture in Guangxi, attracting a large number of foreign capital and people into gold mining. Zhang Xiewen of Wuzhou Longhua Village is one of them. He was engaged in leather shoes manufacturing industry in his early years and held a lot of idle funds in his hands. In 2010, Zhang Xiewen invested hundreds of thousands of aquatic products at the suggestion of friends. At present, he has 70 cages with a total of more than 2500 square meters of aquaculture water surface, becoming a large local aquaculture household.

Selection of materials focuses on cost performance

Because he has been engaged in the production and manufacturing industry, Zhang Xiewen has a strong sense of cost, even in the face of the aquatic industry, which depends on heaven, he also pays great attention to the ratio of input and output. "Feed accounts for a large part of the cost of breeding, and choosing good feed is critical." Last year, due to quality problems with feed from a certain manufacturer, Zhang Xiewen decisively terminated the cooperative relationship and began to seek high-quality and stable feed.

At this time, Zhang Xiewen learned that Guangdong Huihai Agriculture and Animal Husbandry Science and Technology Group (hereinafter referred to as Huihai) feed market reputation is good, holding a try attitude, he took 4 cages and other three manufacturers of feed for comparison. After 40 days of breeding test, Huihai feed was only 1.44, a pack of feed out of 34.7 jin fish, although the fish out of 0.5 jin lower than another manufacturer's/pack, but the price is cheaper than 15 yuan/pack, comprehensive advantage is more obvious. Therefore, Zhang Xiewen immediately decided to switch to Huihai feed, which also attracted the trial of surrounding farmers. "In addition to the fast growth rate of Huihai feed, the nutrient absorption rate is high, and the fish raised are also very good."

Facts proved his vision. On August 15 last year, Zhang Xiewen officially began to use fish pond male 123 puffed grass carp feed, initially weighing 1.95 jin, October 16 sample weighing an average weight of 4.45 jin. During this period, it happened to be a week of heavy rain, because the Xijiang water was very turbid, and there was no feeding. However, in just two months, the weight of grass carp increased by 2 and a half jin, and the feed coefficient was only 1.52. "It's rare for fish that have been raised for so many years to have such an effect." Zhang Xiewen is very satisfied with the effect of the materials, but also firm confidence in Huihai feed.

High efficiency of transformation mode

The local area is a one-time seedling, the end of the traditional breeding mode of fish, Zhang Xiewen thinks that there are many problems in this mode, first of all, the breeding cycle is too long, the pressure on funds is relatively large, secondly, in January to March for breeding idle period, failed to make full use of breeding resources, the third is that farmers concentrate on the end of the year fish, often will pull down the fish price, the timing of fish is quite passive.

At the suggestion of Huihai Company, Zhang Xiewen began to try new breeding models. He introduced that seedlings were cast in November of that year, and the density of each cage culture was increased to 2000, and the grass carp was cultured in cages until March-April of the next year. When the specification of grass carp reached about 1 jin, it was divided into cages. After that, increase the feeding amount, the breeding cycle is about 3 months, the grass carp specification is about 3 jin, at this time each cage first out of 500 grass carp, reduce the breeding density, to the end of the year grass carp can reach more than 5 jin listing specifications, and then according to the market conditions to choose the opportunity to fish.

It is understood that after Zhang Xiewen changed the breeding mode last year, nearly 800,000 jin of fish were produced that year, with an income of more than 5 million yuan. The comprehensive cost of feed, seedlings, labor, etc., the total benefit reached more than 2.2 million yuan. The profit of single net cage was 31,400 yuan, each net cage gained 3000 yuan more than before, and the profit of 70 net cages increased by about 210,000 yuan. The benefits far exceed those of previous years. In this regard, Zhang Xiewen highly praised this breeding model, he believes that this model has the characteristics of year-round breeding, yield improvement, flexible fish production, etc., breeding advantages are very prominent.

Common disease control easy to manage

Cage culture is relatively difficult, but Zhang Xiewen does not dare to be careless in his usual management. Especially in the caged grass carp culture stage, coinciding with the flood period from March to April, there are too many pathogenic bacteria and harmful substances in the water, and the grass carp is weak during the season, so the incidence rate rises sharply. Zhang Xiewen suggested that attention should be paid to the disinfection of water bodies, and bags of drugs could be hung upstream of each cage, and chlorine dioxide in blocks could be used to slowly release its efficacy, which could reduce the content of pathogenic bacteria and harmful substances in water bodies. When dividing the net cage, the grass carp that has been taken out of the net is first soaked in potassium permanganate and then put into the net, which can play a very good disinfection effect.

In addition, for cage culture, how to deal with the rainstorm period in July and August is a headache. Zhang Xiewen's practice is to stop feeding during the rainstorm period. When the river is clear, start feeding. Feed 1/4 of the feed first. Control the feed 2-3 days before adding to the normal feeding amount. At the same time, mix and feed health care drugs such as multivitamin and allicin every meal. Mix the feed continuously for about a week. After that, the grass carp can generally eat normally. As it turns sunny and the water temperature rises, pests and diseases begin to increase at this time. He usually uses the hanging bag method for prevention and control, regularly uses bait once every half month, and will let Huihai salesmen come to detect, basically avoiding the outbreak of parasitic diseases in advance.

"This year, fish farming did not appear much disease, management is very worry." Zhang Xiewen believes that cage culture grass carp is still easy to live, as long as the fish disease prevention and control as early as possible, in the disease high incidence period management can be meticulous in place, generally will not appear too much loss. it is understood that zhang xiewen has planned to build 30 more cages to expand the scale of culture, and has full confidence in this year's harvest.