Water celery, vegetable pond, raising green shrimp, good ecological breeding

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Raising green scampi in the watercress vegetable pond is a season of water celery farming and a season of freshwater prawn. It does not affect the production of celery. It fully utilizes the food organisms in the pond, increases the yield of the prawn, and increases the annual economic benefits of the pond. Its technical points:

First, the cultivation of water celery

1. Deeply fertilize. In mid-August, deep fertilization began, with 50 kg of ammonium per acre, 50 kg of high-quality compound fertilizer, and 2,500 kg of organic fertilizer, evenly applied to the field.

2. Germination sowing. In early September, the seedlings were pulled, and the pulled cress was bundled and placed in a cool place covered with straw. The cress remained moist. Before September 10th, it can be planted, and the seeds are sprinkled in the celery pond. The spacing is usually 10 centimeters per cress, not too dense, about 150 kilograms of celery per acre. After about 20 days, the celery grows to 10 cm to 15 cm in size. When it is transplanted, 50 kg of compound fertilizer, 80 kg of bean cake and 1,000 kg of sheep ash are required. This is the most time-consuming process for the whole celery process. Process. Each spacing is 10 cm, which is very important. In the process of transplanting seedlings, thick and thick seedlings should be transplanted evenly.

3. Field management of celery pond. After the celery seedlings are planted for 15 days to 20 days after they are planted, they should be allowed to dry automatically. The criteria for drying out are the same as those for short-term rice field depotting, and then the water is applied and the seedling fertilizer is increased. The urea is 15 kg/mu. The depth of the water is increased according to the growth condition of the celery seedlings. Generally, the celery grows to about 15 centimeters on the surface of the water and is filled with water. Fill the celery with only one tip, let it grow, and slowly fill it. General early shallow water, medium-term water control, late flooding.

4. Pest control. The main pests of cress are aphids and rot. If it is a brick concrete pond, it will not be affected. Because there is not much dirt in the pond, the helium gas will not exceed the tolerance of the growth of the cress.

Second, shrimp culture

1. The whole pond is planted. After the sale of cress, the clear pond was renovated to plug the leak. Put 30,000 to 40,000 tail-shrimp seedlings per acre.

2. Transplant water plants. A line of 1-metre-wide weeds was placed around the pond to allow the shrimp to inhabit, hide and provide natural food. The young leaves and young shoots of aquatic plants can feed on the shrimps. The breeding of a large number of microorganisms in aquatic plants is a natural bait of the shrimp, which can make up for the incomplete nutrition of the artificial feed. Aquatic plants account for about 20% of the pond area.

3. Scientific feeding. When the water temperature rises above 8°C in March, feed is started and the feed is injected every 3 days. Generally, the feed is charged at the maximum temperature in the afternoon, and 0.5 kg each time. As the water temperature rises, the amount of feed is gradually increased and it is fed once a day in April. In the spring, shrimps are of large specifications and have a low density. They can use abundant feed in ponds, and only about 1 kilogram of refined material per kilogram of fresh shrimp.

4. Capture arrests. From the beginning of May, the cage nets used for catching shrimps were listed on the market, catching up to stay small, and getting listed on a balanced basis. It was possible to catch dry ponds until mid-August.

5. Pest control. The diseases of green prawns mainly include black spot disease, gill disease, ciliate disease, etc. The prevention and control should be based on prevention. Regularly use quicklime to disinfect the water body and adjust the pH of the pool water to maintain it at between 7.5 and 8.5, which can inhibit the proliferation of harmful microorganisms. Quicklime can also effectively increase calcium in water, reduce organic oxygen consumption, and prevent the occurrence of diseases. If it is found to be a disease, the right medicine will be cured completely.

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