Astragalus Breeding Technology and Disease Control (4)
Trout Farming Mode 1. Paddy field farmed paddy fields can be used without drying or flooding. The area should not exceed 666.7 square meters (1 mu), and the water depth should be about 10 centimeters. It is best to use a brick or a piece of stone, 40 cm high, 30 cm wide, and 5 cm from the top of the wall to prevent it from running off with a tail wall or drill hole. It is also possible to use 70 cm 40 cm cement boards. Tian Hao and the ground into a 90-degree angle, the bottom buried in the bottom of 10 cm or so, add brick, stone, soil, etc. for the top. If it is a rough reform and extensive farming, as long as the elevation and widening of the Tian Hao can be avoided. Tian Tian central dug an area of ​​4 square meters deep about 0.5 meters of water. The trenches are to be excavated around the fields, and the fishes in the field are digging the well-shaped fishes. They are generally 30 cm wide and 30 cm deep. All ditch and ditch must be connected, and ditching can be done before and after transplanting. After transplanting, the seedlings can be transplanted to the sides of the ditch and the side of the plant. This will not reduce the number of seedlings. Inlet and outlet ports should be equipped with a solid bar fish equipment to prevent jaundice from escaping. 2. The cement pool is cultured in a place where the sun, ventilation and water sources are convenient. It is generally a cement and brick surface structure, and a semi-underground pool is built. The size of the pool is 6 to 20 square meters. The surface and the bottom of the pool should be polished smooth to avoid injury to the carcass. The pool corner bricks should be arc-shaped, the pool pods should be extended to the inside, and they should be set in the drainage outlets and overflow outlets. The inlets should generally be 30 cm to 40 cm above the water surface, and the drainage outlets should be installed under the pool. The overflow is generally located 20 cm above the mud surface. Drain outlets and overflow outlets should be located on the opposite side of the inlet, and all the outlets should be equipped with metal mesh to prevent escape. After the above work is done, take measures to remove alkali from the cement pool. Because acidity and alkalinity increase, the cultured jaundice will be damaged. The method is to dissolve 1 kg of superphosphate fertilizer or 20 g of acidic sodium phosphate per cubic meter of water. After immersing for 2 days, rinse with clean water to proceed to the next step. The cement ponds have two kinds of culture methods: soil and soilless. Both methods must be planted with water peanuts or water hyacinth to regulate the water temperature and provide summer heat for the squid during the hot season. Several feeding points (about 1/10 of the space). A. It is advisable to have 20 cm to 30 cm soil on the bottom of the ground culture, and the water level above the surface of the mud layer should be maintained at 20 cm to 25 cm. If the water is too deep, the carp consumes too much energy during the activity. If the water is too shallow, the water body may be turbid and the temperature of the water may vary greatly. B. The soilless culture water level is preferably maintained at 30 cm to 40 cm. Its superiority lies in the good disinfection effect of the water body and its easy operation. However, when it is cultivated in the soil, it is difficult for the drug strength to act on the soil in the bottom, and it is easy to breed various parasites and their intermediate hosts, such as grasshopper, flat leaf snail, framed Snails, bacteria, etc. (To be continued)