Whether it is a one-year polyculture mode or a tilapia insemination mode of three years and two years, each has its own strengths. However, with the increasing demand for quality of aquatic products, the latter two models will become more and more common.

Guangdong Province is a large tilapia aquaculture province in China, and its output accounts for about 50% of the total tilapia production in the country. Gaoyao City is an important base for the production, processing, and export of tilapia in Guangdong. Its tilapia cultivation scale, yield and benefits rank among the highest in the province. The initial formation includes tilapia seedling production, adult fish farming, processing and export, and feed. Supply system, fish drug management, technical support services, and other tilapia industry chain. In 2009, Gaoyao tilapia cultured an area of ​​102,000 mu, with a production volume of 82,000 tons, and an output value of 770 million yuan accounting for 52% of the total production of aquatic products in the city, of which the processing volume reached 55,000 tons, and the export value reached 46 million US dollars. The export value accounts for 12% of the country and 20% of Guangdong respectively.

Tilapia has now become a leading high-level aquatic product. Tilapia culture has become one of the most important ways for high-income farmers to increase their wealth. Pond culture of tilapia is the main mode of high-yield tilapia cultivation. The author summarized the model of tilapia pond culture typical of Gaoyao city and obtained three kinds of tilapia breeding models with Gaoyao characteristics. as follows:

1, a year of polyculture mode

The one-year-old polyculture model is the traditional breeding method of high-yield pond fish. Its main characteristic is that according to the biological characteristics of different fishes, such as inhabiting habits and feeding habits, fish of different species or different specifications (age) are stocked in the same pond to fully utilize the water space and the ecological habits of different fishes. Production potential, to increase production per unit area, reduce production costs. In April and May each year, polyculture fry stocks are launched. In October, the listed trout and grass carp are caught, and the fry are fed accordingly. When fed with compound feed, the daily feed amount is 2–4% of the total weight of the fish, and every 4 - 5 acres of water with 1.5kW impeller aerator. Table 1 shows an example of a year-old polyculture pattern of Gaoyao tilapia.

2. Two years

The tri-culture mode of tilapia in the second year is the intensive culture mode of tilapia, adopting the method of dense cultivation in the early stage and gradually adopting sparse breeding methods, requiring at least three or more ponds. Feeding compound feed throughout the breeding process is highly controllable and product quality is guaranteed. The daily feeding amount is 2-5% of the body weight of the fish, and 1.5 kw impeller aerator is used for every 4-5 mu of water. Table 2 shows an example of a one-year, one-year, polyculture pattern of high-yield tilapia.

3, two years

One year of raising fish is the breeding of large-size tilapia, with a small amount of four major fish. In the first half of April, the large-size tilapia species for winter, 50g/tail, was stocked with 800 tails/mu. Feeding compound feed, feeding for 4 months, each fish reached about 500g, all caught up for listing. The second salmon fry was then stocked with a seed size of 50g/tail and a stocking capacity of 1000 tails/mu. Feeding to March of the following year, the average weight of about 500g per tail was taken from the whole pond. Feeding compound feed throughout the breeding process, the daily feeding amount is 2-5% of the fish's body weight, regular adjustment of water quality, strong controllability, and relatively good product quality. Each 4-5 mu of water is equipped with 1.5kw impeller aerator. Table 3 shows an example of the year-on-year pattern of the high-yellow tilapia.

In summary, the three breeding modes of high-yield tilapia have their own strengths. The one-year-old breeding mode is a traditional three-dimensional breeding mode. Since the product quality is not guaranteed and the profit is low, it has gradually decreased in recent years. The two-year-old and three-year-old fish in the second-year and third-year are large-scale tilapia polyculture modes, free from poultry. Affected by livestock and feces, the disease in the breeding process is relatively reduced, and the quality of the product is improved. The total output and the total output value are high. At the same time, the input cost is high. It requires superior geographical conditions for breeding and the farmers have strong breeding techniques. Through the comparison and analysis of the three aquaculture models for three kinds of tilapia pond culture (see Table 4), as the quality requirements of aquatic products are getting higher and higher, and farmers’ aquaculture technology has been improved, the high-yielding tilapia farming model has gradually shifted to one. The two-year and two-year three-year patterns.