This year, for shrimp farmers, it is a "big year". The prices of production materials such as feed and pond rent have risen sharply, and the cost of breeding has risen. Farmers are suffering. Is there any good farming method that can help the farmers save the cost of farming without affecting the breeding effect? Recently, the reporter from the Southern Rural Newspaper asked the local farmers, technicians and experts about this issue. They suggested that the households should use intermittent hunger feeding or a small number of feeding methods to save the feed. At the same time, it is necessary to strengthen water quality management and cultivate natural biological bait for shrimp. He Liuqing, a technician at a farm in Wuchuan, said that if the farmer wants to save the feed, he can try the “ hungry feeding method â€. He introduced that after the shrimp began to feed the 2# feed, the adopter could adopt this method. After two or three days of normal feeding, the households can reduce the number of feedings on the next day. If the original feeding is three times a day, the households can only feed once in the evening or in the morning. The normal feeding resumed the next day. He said that the use of "hungry feeding method" does not affect the growth rate and culture effect of shrimp. Due to the small amount of feed used, the bait coefficient of the shrimp can also be reduced. He Liuqing also uses this method to raise shrimp in farms. “It is indeed possible to save some feed,†he said. It is understood that there has been a similar study in the academic world. This phenomenon is called " compensatory growth of organisms ". It means that after a period of hunger or food restriction, the animal will resume eating for a period of time, and its body weight is close to the same time (hunger time). + Restore feeding time) Individuals who continue to eat satiety. A number of scientific experiments have confirmed that many species of carp, carp and cichlid have this phenomenon. According to Professor Lin Xiaotao from the Institute of Hydrobiology, Jinan University, the growth rate of P. vannamei was significantly accelerated after a period of hunger and then resumed eating. At the end of the experiment, there was no significant difference in body weight and normal eating shrimp. However, He Liuqing stressed that the use of the "hungry feeding method" has a premise that must be maintained for a period of time. Otherwise, the weather changes, the water quality of the pond changes, the biological bait decreases, the shrimp does not feed, and the body becomes weak due to hunger, which is easy to cause stress. Professor Lin Xiaotao's research also confirmed that after the hungry shrimp resumes eating, the food conversion rate can be improved by changing the energy distribution. The proportion of energy allocated for growth is increased, and the energy used for metabolism is reduced. Regarding the feeding method of prawn, Wang Xiuxin, the manager of Daxie Town Branch of Xinhui District, Jiangmen City, Xiamen Liyang Aquatic Hospital also proposed that the households should change the bad habit of feeding only two or three times a day, and change to a small amount of meals. He said that most of the current shrimp farmers are saving money, feeding only two feeds a day in the morning and in the evening. Due to the small number of feedings, the amount of feed per feeding is large, and the time for the shrimp to feed the feed is more than one or two hours. He believes that the shrimp feed time is too long, the longer the feed is in the water, the more serious the nutrients in the feed are dissolved and lost. In this way, shrimp feeding may be a feed with low nutrient content, affecting growth, increasing the feed coefficient, and increasing the cost of breeding. Wang Xiuxin also told reporters that he had a customer who used shrimp to feed a small amount of meals, with a feed coefficient of 0.7. According to the schedule of the family members, he suggested that the farmers feed four times a day, in the morning, at noon, in the evening, and at night. He said that the prawns fed four times a day not only have a low feed coefficient, but also grow faster than shrimp that are fed two or three times a day, and can be marketed about 10 days earlier. Professor Lai Qiuming of Hainan University proposed that the farmers should have good water, cultivate zooplankton and cultivate natural bait for shrimp. Between the natural bait and the artificial compound feed, the shrimp prefer natural bait. He also stressed that the need to strengthen water quality management and create a good water environment. Only in a good water environment can prawns grow healthily. Breeding healthy shrimp is the most economical way to feed. Otherwise, the shrimp will die. 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Saving feed can make prawn grow faster.
Label: Feed