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Rice field raising shrimp technology
First, field selection and preparation of shrimp farming rice fields require close to the water, adequate water, water quality, pollution, convenient drainage. Paddy field breeding area is best to be contiguous, with an area of ​​5-20 mu per area. The temporary holding pool is excavated at one end of the field. The length of the pool is limited to the width of the field, and the pool width is 8-10m, and the depth is 1.2-1. .5m; excavated around the field block ditch, width 3-5m, depth l-1.2m; larger fields open a few field ditch, width 2-3m, depth 0.8-lm. The excavation area accounts for about 15% of the total area of ​​the paddy fields. The excavated soil is used to raise the height of the field ridges and piles, and the sluice gates for drainage and drainage are built at the same time. Before the stocking, lime and tea seed cake were used to disinfect the pool and the ditch. Each loach was made of 75kg of lime and 25kg of tea seed cake, which was dissolved and soaked with water after soaking. Second, rice cultivation selection of strong stalk, surface fertility, not easy to lodging, less pests and diseases, large spikes and many grains, rice products of good quality and high quality, such as Xu You, Shu You, salt wolfberry, Wu Yu and other varieties. Generally after the "summer season", sowing, transplanting seedlings in early June, take the combination of strip planting and planting in close together, shallow water planting methods, and conditional mechanical casting can be implemented. The basic seedlings per acre are maintained at around 120,000. Prior to planting, the pesticide was used to prevent insecticides on the seedlings. Third, shrimp species stocked shrimp species stocking is carried out after live seedlings. Put 800-1000kg of livestock and poultry manure per acre in the ditch prior to release to fertilize the water quality. At the same time, transfer the aquatic plants such as Hydrilla, Malan, and Water Peanuts when transplanting them. The area of ​​shrimp ditch is required to be l/2-2/3. . There are three types of shrimp stocking: 1 Holding eggs. In the natural waters, collect more than 6cm of brooding broodstock, acre 0.5-lkg. 2 put shrimp species. Mainly in the past few years of breeding up to the listed specifications raised up young shrimp, specifications 2-3cm, acres put 15,000 - 20,000. 2 put shrimp seedlings. The shrimps that were bred in that year were of size l-1.5Cm, and the specifications were neat, and 20,000-30000 acres were put. Generally, it is selected to be carried out in the morning on sunny days or on rainy days. It is put in multiple positions along the holding tanks and around the ditch so that the shrimp species can be evenly distributed in the ditch. In order to make full use of the water space, it is also appropriate to put some squid, squid and summer flowers, and put 20 to 100 mus. Fourth, feeding and management 1. bait. According to the growth condition of shrimps, scientific feeds are promptly fed. Artificial diets account for 40% of animals (small fish, snails, etc.), and plant (bran, wheat flour, pancake, etc.) accounts for 60% of the total. Feed 1-2 times, mainly in the evening feeding, scattered along the shallow water around the shrimp ditch and fixed-point feeding, daily feeding amount of 5% to 8% of the body weight of shrimp in a flexible grasp. 2. water. In the early stage of stocking, the shrimp seedlings maintained a water depth of 5-10 cm, and gradually deepened. In August and September, the high-temperature season insists on changing the water every 5-10 days, each time changing the water l/3; when abnormal shrimp is found, it is necessary to add water or change the water in time. 3. Anti-escape. Do a good job of preventing floods and preventing typhoons, and guard against heavy rains rushing into fields or flooding fields. 4. Prevent disease. Into the water outlet should be sealed with a dense net, found that the enemy should be caught in time to remove. The temporary holding pool and ring ditch should be regularly sprinkled with lime, the amount of 20ppm, can prevent shrimp disease, increase the necessary calcium of shrimp. Pesticides for shrimp farming in rice fields should be given special caution and organic phosphorus drugs should be banned. 5. Fishing will be carried out by catching big fish and small fish. Starting from October, shrimps with cages, cages and shrimps will be trawled regularly to catch prawn with a size of 4 cm. The small-size raw shrimp ditch left will continue to be raised. Feeding on a regular basis, strengthening winter management, and starting intensive feeding in March of next year, all reaching more than 4cm by May-June, and then catching a listing.