The culture methods and techniques of freshwater sea bass, the secret of sea bass culture experts for seven consecutive years.

   is a household name in Baijiao Town, Doumen District, Zhuhai City. He likes to ponder on aquaculture technology, is good at summing up past experience, has an insight into the market situation, and then recommends the aquaculture experience to other farmers after the success of his own fish pond experiment, which is deeply trusted and supported by local farmers and leads local farmers to grow rich.

He Shenming was enthusiastic and sociable. Soon after, he took the lead in breeding sea bass, and later he Jingtang and his brother he Jingtang distributed sea bass feed, with an annual sales volume of about 5000 tons. Because of his high popularity and influence, he has been elected as a deputy to the National people's Congress of Doumen District, Zhuhai City, and is the vice president of the Fisheries Association of Baijiao Town, Doumen District.

Sea bass farmers in Zhuhai, Guangdong

Baijiao Town, Doumen District, Zhuhai City, which is located at the mouth of the Pearl River, is the famous hometown of sea bass in China. He Shenming, who began to breed sea bass in 1998, has rich experience in sea bass culture. At present, he breeds sea bass of 40-50 mu. Facing the reporter, he said with a smile, "the water quality of fish ponds can be known by blowing the wind and smelling the air." Between talking and laughing, it is the self-confidence and confidence that he has accumulated over the years.

In recent years, with the continuous expansion of the breeding area, the price of sea bass fluctuates greatly, and sometimes even falls below the cost price, some people make money, and some people lose money. However, even in the first half of 2013, when fish prices were the lowest, he Shenming had nothing to lose from fish farming. Because he has a wide range of connections and is familiar with the market. This year, he Shenming made a lot of money by seizing the good market.

Since January this year, the price of sea bass has been rising steadily. While others are waiting for a better price, he Shenming decisively produced a pond of fish in March, when the price of sea bass is at its peak: the price is 11.3 yuan per jin, the yield per mu is about 10,000 jin, and the cost is 8.0-8.5 yuan per cat. the profit per mu reached 30,000 yuan. Shortly after he Shenming finished the fish, the price of sea bass began to fall, and at present it is only 9.5 yuan per jin. Therefore, it is better to raise good fish than to sell good fish, and it is particularly important for farmers to master certain market analysis ability.

   aquaculture management is carefully put into place   oxygen exchange is the key

Over the past decade or so, he Shenming has a maximum yield of 15000 jin per mu and a minimum yield of more than 8000 jin, with an average yield of more than 10,000 jin per mu. His seedling density is 15000 / mu, bighead carp is 100 / mu, the culture period is about 15 months, and the fish size is 1.5jin / tail.

"it is very important to pay attention to the survival rate, reduce the pH value and stabilize the water quality after seedling." He Shenming said that when the pH value is high during the seedling stage, feeding chilled bad water can easily lead to enteritis and blackbody of fish fry, resulting in a low survival rate. Therefore, he used "organic acid + glucose" before release to reduce release stress; when the pH value of pond water was high, he used "lactic acid bacteria + glucose" to lower pH value and stabilize water quality; when feeding fry, he used "Haichun 3103-3505" combined with Hailong Miaobao / fry opening feed; fish fry developed enteritis and could be taken orally with "vitamins + Kanglisha". Through these reasonable management, the survival rate of he Shenming seedlings is more than 60%. "Fish culture should be managed from the beginning of the fry."

He Shenming believes that fish farming has to patrol the pond every day, and sometimes the fish will have an accident in the middle of the night. Because the weather changes quickly, it has a great impact on the fish. "for example, the east wind is blowing, the air pressure is low, the dissolved oxygen is low, and the water quality changes rapidly. At this time, it is necessary to control the feeding and pay attention to increasing oxygen."

He Shenming pays great attention to oxygen enrichment in sea bass culture, and the fish ponds are even equipped with oxygen dissolving meters. According to he, it is necessary to increase oxygen in time when the dissolved oxygen is lower than 2.5mg/L. "it is usually necessary to turn on an aerator, because the dissolved oxygen is high, the fish digest well, and the fish grow well." He Shenming said that the fish ponds had better be equipped with 1.5 mu / aerator, which should be opened all day in spring and winter.

In addition to attaching importance to increasing oxygen, he farmed sea bass also pay great attention to changing water. "in raising sea bass, you should change the water frequently." He Shenming told reporters that because the water quality of sea bass varies greatly, it is necessary to maintain water quality balance by changing water. His fish ponds usually change the water every 3 days, each time changing the water depth of 1x3, usually draining at night and entering the water during the day.

   diligently diverts water to change bottom weight to prevent   cost is reduced by 0.5 yuan / jin

In the alternating season of spring and summer, sea bass have a high incidence of "swimming". Many farmers do not know the specific causes of swimming and blindly try various schemes, which can not prescribe the right medicine in time, resulting in increased losses. General household commonly used programs: oxygen enhancer + formaldehyde or copper sulfate and other disinfectants disinfect insects and sprinkle crude salt, sodium thiosulfate detoxification, the effect is not good. But he Shenming is very good at dealing with sea bass "swimming".

According to he, first of all, "granulated oxygen + Haishun 3502" is used to increase oxygen and anti-stress; then "Hai Ke 3202" is used to increase dissolved oxygen in water after detoxification and purification of water; finally, if the "swimming" caused by too many parasites still need to be combined with appropriate disinfection and insecticidal drugs.

Aquaculture sea bass insecticidal, disinfection, water change frequently, algae phase, bacterial phase are destroyed, many farmers rarely change the bottom of water transfer, it is easy to have high water quality problems of yellow turbid water, ammonia nitrogen and sub-salt. He Shenming advocates early internal prevention, diligent water diversion, timely detection and timely treatment.

"whether it is the early or late stage of breeding, we must pay attention to the transfer of water." He Shenming told reporters that he often goes to Haida service station to test important water quality indicators such as pH value, ammonia nitrogen, nitrite and so on. If ammonia nitrogen and sub-salt are high, regular use of "calcium peroxide + pond bottom an" to change the bottom of the water to maintain ammonia nitrogen and sub-salt at a low level; if turbid water, regular use of "turbid water clear" to improve the transparency of the water body, cooperate with "lactic acid bacteria + yeast + algal cream" to cultivate algae.

Many people will worry that the use of water transfer and internal medication products will increase the cost of drugs, but he Shenming is very precise. "the cost of medicine and water transfer per jin of fish is 0.1-0.2 yuan, but because of frequent water diversion and internal administration, the physique of the fish is enhanced and the water quality is guaranteed, so there is almost no need to disinfect his fish ponds. The cost of disinfection medicine alone is about 0.2 yuan / jin less than that of others."

Pay attention to the internal administration of water diversion, in addition to saving drug costs, but also reduce feed costs. "if there is 1-2 jin more fish per pack of feed than others, 1-2 jin of fish (10 yuan per jin of fish price) will earn 10 yuan more per pack of feed, and if a pond fish uses 3000 packets of feed, it will earn 30, 000 yuan more." Therefore, if he Shenming raises a fish, its breeding cost is at least 0.5 yuan / jin less than that of others.

In addition, when the water temperature is low in winter and spring, frostbite is easy to infect water mold, when the disease is serious, it is difficult to control, and the dead fish are often serious. "pay attention to regular bottom change and disinfection, which can effectively prevent the occurrence of water mildew." He said that regular use of "calcium peroxide + pond bottom an" for pond bottom oxygen, disinfection, deodorization, and then use povidone iodine for water disinfection, 3-4 times a month. "

Comments from the industry:

High culture technology and strong market analysis ability are the keys to its success.

Commentator: Chen Bingchang, sales Manager of Haishui District of Zhuhai Hailong Biotechnology Co., Ltd.

Boss he Shenming has achieved great success in the continuous accumulation of sea bass culture technology through hard work, concentration and exploration. Boss he attaches great importance to the quality and technical service of feed manufacturers. He has cooperated with Haida for 7 years. He very much recognizes Hailong's technical service and feed quality, and has achieved great success in continuous application in the process of breeding. No matter in the aspects of water quality, feeding, process management, feed selection and technical application, through its more than ten years of culture experience, combined with the technical service of Haida, the final feed performance effect of sea bass culture is at the cutting-edge level of the industry. to achieve greater breeding profits.