The lotus and fish rearing mode refers to the combination of both lotus and fish in the same body of water, and the long-term or short-term joint living of the fish lotus together is a kind of advanced combination of high yield and high yield. There are a large number of aquatic weeds, aquatic insects, benthic animals and pelicans fighting for water in Lintian, competing for fertilizer and contending in the light, affecting the growth of lotus, but they can be used as bait for fish. Fish farming in the lotus field can not only control weeds in lotus fields, and control pests and diseases in lotus fields. At the same time, fish have significant effects on reducing soil bulk density, increasing soil porosity, and improving soil fertility. Therefore, the fish breeding lotus field is more effective than the lotus root monocropping field.
First, the design of a symbiotic project. Using the "back" type project, that is to open ditch around the lotus field, the ditch 2.5 meters wide, ditch depth 1.5 meters, 1.5 meters high outside the leech, set aside about 3 meters wide road into the field, the entire project was "back" font . The ditch area accounts for about 10% of the total area of ​​Liantian. In this project, the average yield per mu of lotus plants (varieties: Suzhou slow load) can reach 103.57 kilograms, and the average output value per mu is about 2,700 yuan, which is an increase of more than 1,000 yuan per mu over paddy field cultivation under the same conditions. The advantage of this project is that the water level in the ditch does not change significantly due to changes in the water level of the lotus field, and it can satisfy the water environment required for fish growth and ensure the growth of fish. In addition, due to the ditching around, the embankment is higher, which can reduce the losses suffered by the lotus during the storm.
Second, species selection
1, the choice of fish species. Lotus seedlings are suitable for 35-45 kilograms per acre, generally 60% for carp, carp, 20% for carp, 15% for carp, grass carp, 5% for carp, and a small amount of other fish species , such as leather moustache, Umberine and so on. The number of stocks of herbivorous fish should be strictly controlled, otherwise it will affect the growth of lotus root.
2, the selection of lotus varieties. Lotus should choose the late-maturing varieties, such as "Bao Yingmei Red", "Suzhou Slow Charge" and so on.
Third, put the fry, planting and feeding, fertilization
1, fry put. The time for the release of fry should be carried out after the project is excavated and sterilized for half a month. It is generally from mid-March to mid-April of March. The size of the fry is generally 30-50 g/tail. For herbivorous fry, if sufficient green fodder can be guaranteed, the amount can be appropriately increased. For omnivorous fry, the amount can be increased according to the feed supply. The carp seedlings can be placed at 300-500 tails/mu and the leather beard can be released at 100-200 tails/mu. However, it is best not to exceed the total amount of 50 kg/mu.
2, lotus root planting. Lotus roots are planted from March to May. The amount used should be slightly less than conventional cultivation, generally about 200 kg/mu. When planting the pods at the inner ridge where they are connected with the surrounding fields of Putian, the top buds should be oriented toward Tianxin, more than 1 meter away from the pupa.
3, fish feeding. A large number of aquatic weeds, insects, benthic organisms, etc. in lotus root fields can be used for feeding fish fry. For example, the method of extensive breeding may not be used for feeding. To obtain high yields, a certain amount of feed should be started from the end of March upon request. The amount of feed should be 10-20% of the total amount of fish.
4, fertilization. The base fertilizer of lotus root should be applied early and reused. In general, 2500 kg of organic fertilizer and 30 kg of urea are used for land preparation. The top dressing of lotus root is mainly based on urea, and the amount of topdressing can be reduced by about 50% compared with general cultivation conditions. In order to prevent the influence of fertilization on fish, half-side first-serve and half-back-apply measures may be adopted, with intervals of 1-2 days to allow the fish to have room for maneuver.
Fourth, water level management. One week before transplanting lotus roots, 5 cm of water in Putian impoundment, and the water in the fish ditch is separated from the lotus seed field; after the lotus root is transplanted, the lotus paddy field water level is maintained at 3-6 cm until the lotus root grows and a large number of floating leaves emerge. Let the fish go to the lotus field for feeding activities. In the high-temperature season of August-September, the water level should be controlled at 40 cm or more, and water should be changed once every 3-4 days.
First, the design of a symbiotic project. Using the "back" type project, that is to open ditch around the lotus field, the ditch 2.5 meters wide, ditch depth 1.5 meters, 1.5 meters high outside the leech, set aside about 3 meters wide road into the field, the entire project was "back" font . The ditch area accounts for about 10% of the total area of ​​Liantian. In this project, the average yield per mu of lotus plants (varieties: Suzhou slow load) can reach 103.57 kilograms, and the average output value per mu is about 2,700 yuan, which is an increase of more than 1,000 yuan per mu over paddy field cultivation under the same conditions. The advantage of this project is that the water level in the ditch does not change significantly due to changes in the water level of the lotus field, and it can satisfy the water environment required for fish growth and ensure the growth of fish. In addition, due to the ditching around, the embankment is higher, which can reduce the losses suffered by the lotus during the storm.
Second, species selection
1, the choice of fish species. Lotus seedlings are suitable for 35-45 kilograms per acre, generally 60% for carp, carp, 20% for carp, 15% for carp, grass carp, 5% for carp, and a small amount of other fish species , such as leather moustache, Umberine and so on. The number of stocks of herbivorous fish should be strictly controlled, otherwise it will affect the growth of lotus root.
2, the selection of lotus varieties. Lotus should choose the late-maturing varieties, such as "Bao Yingmei Red", "Suzhou Slow Charge" and so on.
Third, put the fry, planting and feeding, fertilization
1, fry put. The time for the release of fry should be carried out after the project is excavated and sterilized for half a month. It is generally from mid-March to mid-April of March. The size of the fry is generally 30-50 g/tail. For herbivorous fry, if sufficient green fodder can be guaranteed, the amount can be appropriately increased. For omnivorous fry, the amount can be increased according to the feed supply. The carp seedlings can be placed at 300-500 tails/mu and the leather beard can be released at 100-200 tails/mu. However, it is best not to exceed the total amount of 50 kg/mu.
2, lotus root planting. Lotus roots are planted from March to May. The amount used should be slightly less than conventional cultivation, generally about 200 kg/mu. When planting the pods at the inner ridge where they are connected with the surrounding fields of Putian, the top buds should be oriented toward Tianxin, more than 1 meter away from the pupa.
3, fish feeding. A large number of aquatic weeds, insects, benthic organisms, etc. in lotus root fields can be used for feeding fish fry. For example, the method of extensive breeding may not be used for feeding. To obtain high yields, a certain amount of feed should be started from the end of March upon request. The amount of feed should be 10-20% of the total amount of fish.
4, fertilization. The base fertilizer of lotus root should be applied early and reused. In general, 2500 kg of organic fertilizer and 30 kg of urea are used for land preparation. The top dressing of lotus root is mainly based on urea, and the amount of topdressing can be reduced by about 50% compared with general cultivation conditions. In order to prevent the influence of fertilization on fish, half-side first-serve and half-back-apply measures may be adopted, with intervals of 1-2 days to allow the fish to have room for maneuver.
Fourth, water level management. One week before transplanting lotus roots, 5 cm of water in Putian impoundment, and the water in the fish ditch is separated from the lotus seed field; after the lotus root is transplanted, the lotus paddy field water level is maintained at 3-6 cm until the lotus root grows and a large number of floating leaves emerge. Let the fish go to the lotus field for feeding activities. In the high-temperature season of August-September, the water level should be controlled at 40 cm or more, and water should be changed once every 3-4 days.
Bicolor PE Film,Medical PE Film,Color PE Film,Bicolor PE Reinforced Film,Puncture Resistance PE Film
XINLE HUABAO MEDICAL PRODUCTS CO.,LTD. , https://www.golbaltravel.com