The fish and crab farming mode in wetlands is an ecological and efficient fishery development model for wetlands based on the combination of available wetland resources and mature and suitable fishery technologies, without damaging the original functions, quality and area of ​​wetlands. .
Wetland repair work
Wetland renovations were carried out in mid-March and renovations were completed before mid-April. Paddy fields should be rehabilitated, reinforced and reinforced with plastic film, sloped 30 centimeters in the bottom and 40 centimeters above the normal surface. Stainless steel metal barriers should be provided at the entry and exit points to prevent crabs from escaping. During the refurbishment of the wetland, fish ditch and fish slipped within the pond, accounting for 10%-15% of the total pond area. Fish slip is located at the bottom of the pool, at the entrance to the outlet, the area of ​​1-3 square meters, a depth of 50 cm; fish ditch generally used "back" shape, "well" shape or "10" shape, width 30 cm, depth 30 cm .
Organic Fertilizers Applied in Wetlands
Organic manure can be used to decompose chicken manure, 80 kg per mu for paddy fields, and 100 kg per mu for loquat ponds.
Wetland culture of fish and crabs
(1) Crab in rice fields. Crabs should choose strong vitality, smooth appearance, rapid reversal, crawling agile, no attachments on the body; specifications should be neat, to prevent the clams from eating too much, kill each other; crab body robust, full body. The stocking crabs generally choose to have warm weather in late April. The water temperature is stable at about 10°C. At the same time, we must pay attention to allocating crab seedlings after returning green rice to prevent crabs from eating and destroy rice seedlings. Generally, about 8 kg of crabs will be released per acre of wetland.
(2) Hetang fish farming. To choose a strong, disease-free, non-injury, uniform size fish species. The amount of fish fry in the pond should not be too large, and fish species of about 7.5 kg per acre (300-400 g/tail) should be stocked. Fishing is generally conducted from the end of September to the beginning of October.
(3) Rice cultivation. Select high-quality rice seeds, about 8 kg of rice can be used per acre. Rice needs to be transplanted before and after the rainy season, that is, April 19-21.
(4) Planting. Choose high quality seedlings. After planting the earthworms, they should be planted as early as possible. The amount per mu is about 200 kilograms. Planting is done in mid-April each year. Note that the species should not be planted too densely.
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