1. The Tuobawan Bay of Tuoli Bay is actually a small reservoir. It is more convenient to clear the fields, and you can implement feeding and fertilization to obtain higher yields.
(1) The site selection Tuobu Bay requires a large belly and a small mouth, with a flat bottom and no water leakage at the base of the dam. The dry season can be drained in the dry season. The water level in the bay can be maintained at 2 to 10 meters. No pollution, water quality is fertile, and the light is adequate. Moderate rainfall, moderate floods. The area is less than 200 mu, preferably no more than 1000 mu.
(2) There are two types of earth dams for dam construction: homogeneous earth dams and clay core earth dams. Homogeneous earth dams are constructed using 5 to 70% of sand and 3 to 50% clay. Clay earth wall earth dams are made of earthen materials with high water permeability as the dam body, and clay is used as the heart wall. The height of the dam should be slightly higher than the normal water level of the reservoir. If the flood is too large and the water level exceeds the top of the dam, the dam can be installed with a low net to prevent it from escaping. The dam surface should have a sufficient width. When the dam height is 6 to 11 meters, the dam width should be 3 to 4 meters. The slope of the earth dam slope should be determined by the dam earth material and dam height. Sandy earth dams should be gentle slopes, clay dams can be slightly steep, and high dam slopes should be slow. Generally within 10 meters of the dam height, the inner slope takes 1:1.5 to 2, the outer slope takes 1:1.5, near the bottom of the dam should be 1:2 or 1:3 slope ratio. Slopes can be protected by block stones or gravel. In order to control the water level, culverts and opening and closing equipment must also be installed, and spillways should also be constructed.
3) Qingji's buildings, stumps, boulders, mounds, etc. in the bottom of the reservoir should be removed and leveled to facilitate fishing. The wild fish and fierce fish in the Kuwan Bay are also cleared. They can be dried, cleared by drugs, fished, electric shocked, and exploded.
(4) The fish breeding conditions of the soil blocking bay are better. In the full use of natural bait, it can also be used for fertilization and feeding. The water environment is also easy to control. Therefore, Tumen Bay is generally used for breeding. , squid species (with a small amount of other species). The main oysters can be used with 10% to 20% of squid; There are three ways in general: cultivate summer flowers: grow 3 to 5 centimeters of summer flowers from fry. It is required that the water in Kuwan is shallow and the area is within 30 mu. Stocking density of 80,000 to 120,000 per mu. Before the stocking, sufficient basal fertilizer and fertilizer submerged ponds were used, and the method of combining bait and fertilizer was used for breeding during the breeding process. Cultivate winter fish species: that is, from 3 to 5 centimeters of summer flowers to grow to 13 centimeters in body length of winter fish, and also to use enough base fertilizer, fertilizer and fish, top dressing and bait with the use of methods. Generally, there are 4000 tails per acre, which can grow to about 2500 fish tails 13 cm after 3 months. The stocking density can be higher if the conditions are good. Breeding 2nd-instar fish species: Up to 10-13 cm in length will be cultivated into large-sized species with a body length of 20 cm or more. A certain degree of polyculture can be carried out, and the stocking density is generally 1,500 to 2,000 tails/mu. Generally, a large area of ​​the bay is used.
2. Net blocking Kuwanwan block Kuwan fish farming and soil block Kuwan fish have certain similarities. The difference is: the area is generally larger, up to several thousand acres; the network is located at a low level and requires a water depth of about 2 meters during the dry season; the network is blocked by double-layers, and the installation method is the same as the fish-blocking facility. The water in the bay is in communication with the large water body, and the water level changes with the change of the reservoir water level. Generally, the fish feed is mainly based on natural food. Therefore, the stocking density is generally smaller than that of the Tuobuba Bay, and the larger size fish species or adult fish are mainly bred. With good technical conditions and adequate fertilizer, Kuwan Bay can also cultivate small-scale fish species, even from fry to summer flowers, and the stocking densities can be very high. For example, the Gaozhou Reservoir in Guangdong Province adopts the method of cultivating large grasses and puts in a large amount of green manure to improve the water quality. In a first-tier net bar area with an area of ​​10 mu and a water depth of 1.5 to 2 meters, stocking grass carp, praying mantis, pupae and pupa 50,000 to 100,000 pounds. Tail/acre, cultivated into 3~5cm summer flowers; then put into an area of ​​100 to 180 acres, with an average depth of 2 to 3 meters of secondary grid (density of 8000 to 15 thousand/mu), cultivated into 7 Centimetres of fingerlings; Finally, 7 cm of fish is placed in an area of ​​800-900 mu, with a depth of 8-12 m in a three-level bay (density of 2,000-3,000 tails per mu), which is cultivated to a size of 13 cm or more. Fish species. The first, second and third-level network barriers are directly linked together.
3. It is difficult to catch fish from the Kuwanu fishery in the Kuwan fish farm. The main reason is that the water is deep and the bottom is uneven. Xin'anjiang Reservoir uses Zhangnet trapping, and the rate of water recovery can reach 90%. The main method is to feed a large number of bait on the food platform to attract fish, and then gradually drag the table into the net to stabilize the fish in the net. Afterwards, Zhang net quickly floated. In the deep Kuwan Bay can be used to "catch, stop, Zhang" joint fishing method of fishing; in the small earth dam Bay can be arrested by pulling nets, the effect is also good.
Agrostis Stolonifera,Astragalus Sinicus,Vicia Villosa,Agropyron Cristatum
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