In September of each year, it is the critical period for rice-fish farming and other co-operative technologies. At this stage, the fish in the paddy fields are in a period of rapid growth, and whether the rice farmers have a good income is also at this time. Therefore, the question of water quality regulation in the paddy field, feed feeding, disease, and natural enemies is crucial to the success of this technology.
Water quality management
Similar to raising crabs, fish farming in rice fields must also have fish letters and fish ditch. Open wells, drain outlets, and install fishing grate bars: The water inlet and outlet openings should be excavated on the corresponding two corners of the rice paddy field, so that the water flow can be maintained. The size of the outlet. It should be based on the size of the field and the size of the influent water during the rainstorm. The safety should not escape the fish. The management of water level and quality of rice fields in fish farming must not only meet the growth needs of fish, but also be subject to the environment in which rice grows. Therefore, the following points must be made in water quality management:
The first is to adjust the water level according to the seasonal changes. In August and September, the water level can be raised to a maximum of 1 to 1.2 meters.
The second is to adjust the water level according to changes in the weather. During the high temperature season in July and September, the water was changed once a week for two times. The water was changed by 1/3 each time. After the temperature dropped, the number of water changes and the amount of water changed gradually.
The third is to regulate the water level according to the pest control requirements of rice baking fields. When rice needs to be cultivated in the field, the water level can be lowered to the surface to expose the water surface. The drying time should be short, and the water level should be added to the original water level immediately after the drying. If rice should be sprayed with pesticides, it should be sprayed as far as possible, and fresh water should be replaced according to the situation to maintain a good ecological environment.
Feeding of bait
The daily feeding amount should be changed depending on the water temperature, water quality, and season. Generally, the daily feeding amount accounts for 1-2% of the body weight of the field fish. Feeding should pay attention to the following requirements. 1, feed varieties, there are green feed such as duckweed, aquatic grass, dry grass, leaves, etc.; concentrate feed such as vegetables, rice bran, wheat bran, bean dregs, distiller's grains and other artificial feed. 2. Feed consumption: Green fodder is fully prepared according to planned production. Green fodder is generally equipped with 200 kg per kg of grass carp; fine material is available as 1:2 of planned output. 3, feeding methods, feed feeding sites to be fixed, green feed to be fed to the feed rack in the small pool, concentrate feeding on the bait in the small pool or hard bottom of the pool. The concentrate feed is fed once every morning and afternoon, and the green feed is fresh, so it is advisable to eat it on the same day.
Disease prevention and control
Prior to stocking fry, 200 g of quick lime or 20 g of bleach was sprayed on the water in a small pool for every cubic metre of water. During the breeding period, lime was used once a month for disinfection, and 40 g of lime was used for each cubic body of water. The main natural enemies of rice-fish farming are rodents and bird pests. One is forbidden to wash pesticide spraying equipment in the field to prevent fish poisoning, and the other is to constantly inspect the barriers at the outlet, especially during the rainy season. Prevent flooding running fish.
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