Using the free space on the roof of a building to raise soft-shelled turtle can not only increase economic income, but also enrich the retirement life of some retired elderly people who are in good health.

(1) The basic conditions for turtle farming on the roof of a building are as follows:

①The roof of a building should be solid: no matter what the roof of a building is, it must be very solid, and it is best to look for the relevant departments to carry out scientific measurements before building a pond on the roof of a building to avoid accidents in the breeding process in the future.

②Adequate water: Because turtle farming requires more water, it is important to consider whether the water source is reliable and stable, as well as the cost of water, before engaging in farming.

③Convenient injection and drainage: turtle farming is inseparable from the exchange of water, so injection and drainage facilities are very important. If it is a residential building, you should consider the impact of turtle farming on the residents' life, especially the impact on the residents' daily water use, or else there will be undue conflicts that will affect the breeding.

④Convenient access: In the process of aquaculture, there is a need for aquaculture-related materials, such as tools and feeds, etc., and people need to visit the site every day to manage the farm. Therefore, the up and down access must be convenient, otherwise it will affect the management of the breeding process.

⑤The climate can't be too cold: turtle farming on the roof of the building is generally required to have a non-freezing climate in winter, so it is not suitable for turtle farming on the roof of the building in the northern region where it is too cold. (2) turtle pool construction roof turtle pond, generally for the brick pool wall with cement surface structure. And according to the size of the roof and the plane of the organization is different, can be laid out for the double column type and single column type two kinds. The single pool is 6 meters long in parallelepiped and 5 meters wide in cross, with an area of 30 m 2. The depth of the pool is 50 centimeters, and the depth of water is 40 centimeters (Fig. 22 and Fig. 23).

Figure 22 Single-row and double-row plan A. Single-row B. Double-row

Figure 23 Single-row (A) and double-row (B) cross-section A: 1. drain 2. suction 3. waterline 4. pool wall 5. light shed roof 6. pool bottom 7. feed table 8. inlet pipe 9. roof B: 1. drain 2. pool bottom 3. waterline 4. pool wall 5. feed table 6. inlet pipe 7 Drainage 8. roof (3) stocking preparation roof turtle farming to a shorter period of spring release autumn catch type is better, so the stocking of the turtle species specifications to each not less than 300 grams is appropriate. Before stocking, the pond should be washed thoroughly, then exposed to sunlight for a few days, and set up the feed table, grass fence and oxygen pump in the pond, etc. After these breeding facilities are set up, water can be injected for stocking. (4) The breeding density of the roof pond is 4 turtles per square meter. Before stocking, soak the turtle body in 2% salt water for 5 minutes to disinfect it, and then pour the disinfected turtle seed into the water against the surface when stocking. (5)Management:

1) Baiting: Baiting is based on the principle of "four fixed". Quality: add 10% fresh feed (such as fish, snails, pig liver and some fruits, vegetables and grasses, etc.) to the commercially available feed for adult soft-shelled turtles, and mix the fresh feed with the commercial feed; Quantity: feed 2% of the body weight of the turtle, and then increase or decrease it by 5% after a few days, according to the eating situation of the meal.

②Regulation of water quality: water quality regulation of turtle farming on the roof, mainly in the high temperature season, the key measure is to raise good water plants, every 20 days should be appropriate water change, the amount of water change for the original pool water 1/2. When the temperature rises to 32 ℃ or more, should be covered with a shade net on the shed. When the pool water pH is lower than 7, it should be adjusted by splashing 25 grams of quicklime per cubic meter of water. (6) fishing roof turtle fishing is the simplest, generally can be sold as much as catch as much, do not have to be afraid of theft, after catching the bottom of the pool should be rinsed and dried before raising.