In order to reduce the cost of planting and breeding, the paddy crabs are cultivated in paddy fields using rice paddies and crabs and arbutin. The planting and breeding industries are skillfully combined in the same ecological environment. The symbiotic relationship between planting and breeding is fully utilized. Ping feeding crabs, crab fat fields, and improving land use efficiency. The crab farm rice produced is pollution-free green food and is very popular. In recent days, the planting mode of rice cultivating crabpea has become a high-yielding, high-quality, high-efficiency eco-agricultural model in the northern rice region. It has been developed to 10,000 hectares in Panjin City, Liaoning Province, and is calculated at a revenue of 7,500 yuan per cubic meter, only this one. The farmers in Panjin increased their income by 75 million yuan. After many years of experimentation, the three-dimensional planting technique of the crabpea crab in Panjin has matured. The main technologies are now described as follows:
I. Temporary rearing of crab seedlings At an end of sufficient water supply and good water quality, a temporary holding pond is to be provided for each lkg of crab seedlings in an area of ​​444 inches. The length and width are not limited, and the normal water level in the holding pond must be maintained at 30ms and 20em. Use a sieve to protect the slope and prevent it from forming a lazy crab. In the first 10 days of releasing the crabs, the temporary holding pool shall be disinfected with quicklime or boulders, transplanted with rice seedlings and aquatic plants, and appropriate amount of decomposing agricultural fertilizer shall be added to promote the reproduction of aquatic small animals for the consumption of crab seedlings. A semi-meter-high anti-stopping wall was set around the holding pool with plastic film and bamboo rods. In early June, the purchased crab (large-eyed flesh) will be stocked in a holding tank and cultivated to maintain a water level of 30-50cm. It is advisable to maintain micro-flowing water to ensure fresh water and adequate dissolved oxygen. The bait used for breeding is mainly small aquatic animals breeding in the pond, supplemented and fed with eggs, soya milk and other baits that have been filtered and diluted by the eyes. The daily feeding amount is twice the weight of the laying crabs, divided into 3 to 5 times. Quanchiposa. When the juvenile grows to two stages, the bait is changed to coarse material such as bean dregs, cornmeal, and bran, and the amount of feeding is 1 times the weight of the crab pond and is splashed twice. In late June, when the crabs are cultivated for about 20 days and reach 3-4 stages (about 3,000 per kilogram), they are released and put into the paddy field cultivation area.
Second, Honda's paddy field for raising crabs should choose paddy fields with flat terrain, convenient drainage and irrigation, and a certain water level. Paddy fields are as high as 50-60cm. About lm from the ridge, dig deep ditch 0.5m, width 1.5, for rice crabs inhabiting the sun. A semi-meter high plastic film escape prevention wall is erected around the field ridge and is fixed with short bamboo rods. In the field of potting, it is necessary to close the herb before cutting and to apply enough basic fertilizer. More fertilizer should be applied to the soil (rough fertilizer contains many enzymes, which can promote the growth and reproduction of plankton in the water, and provide abundant fresh bait for the crab). Apply or not apply fertilizer. Paddy rice transplants should be ultra-thin or transplanted. To control rice pests and diseases in crab farming rice fields, we must use high-safety pesticides for crabs and take the correct method of pesticide application. After rice was transplanted and before the crabs were planted, fine arborvitae was introduced into the paddy field (variety is fine German arborvitae), and the amount was 750 kg per hectare with a coverage of 30%. At the same time, 2 water hyacinths were planted at every lm in the crab ditch for degradation. For example, water hyacinth can affect the growth and development of rice and can be removed at any time. In addition to feeding a small amount of synthetic crab material and feeding it once a day, the amount of feeding will be flexibly controlled according to the food intake of the crabs. July and August are the golden seasons for growth and development of crabs. Food intake is very large. For example, fine green ash in paddy fields can not meet the needs of river crabs, and some fine green arbors can be manually collected and put into paddy fields.
Third, management and fishing management personnel should constantly inspect crab-raising paddy fields, observe the activities of crabs, detect and repair leaks in time, eliminate predators such as rats, birds, frogs and snakes, and prevent crabs from escaping and being harmed. Change the water frequently in the hot season, it is best to water once a day sooner or later, each water l0cm deep.
Rice field crabs can be harvested by traps and sleeves during drainage before or during harvesting, or they can be trapped at night by the pool and captured by burrowing.
I. Temporary rearing of crab seedlings At an end of sufficient water supply and good water quality, a temporary holding pond is to be provided for each lkg of crab seedlings in an area of ​​444 inches. The length and width are not limited, and the normal water level in the holding pond must be maintained at 30ms and 20em. Use a sieve to protect the slope and prevent it from forming a lazy crab. In the first 10 days of releasing the crabs, the temporary holding pool shall be disinfected with quicklime or boulders, transplanted with rice seedlings and aquatic plants, and appropriate amount of decomposing agricultural fertilizer shall be added to promote the reproduction of aquatic small animals for the consumption of crab seedlings. A semi-meter-high anti-stopping wall was set around the holding pool with plastic film and bamboo rods. In early June, the purchased crab (large-eyed flesh) will be stocked in a holding tank and cultivated to maintain a water level of 30-50cm. It is advisable to maintain micro-flowing water to ensure fresh water and adequate dissolved oxygen. The bait used for breeding is mainly small aquatic animals breeding in the pond, supplemented and fed with eggs, soya milk and other baits that have been filtered and diluted by the eyes. The daily feeding amount is twice the weight of the laying crabs, divided into 3 to 5 times. Quanchiposa. When the juvenile grows to two stages, the bait is changed to coarse material such as bean dregs, cornmeal, and bran, and the amount of feeding is 1 times the weight of the crab pond and is splashed twice. In late June, when the crabs are cultivated for about 20 days and reach 3-4 stages (about 3,000 per kilogram), they are released and put into the paddy field cultivation area.
Second, Honda's paddy field for raising crabs should choose paddy fields with flat terrain, convenient drainage and irrigation, and a certain water level. Paddy fields are as high as 50-60cm. About lm from the ridge, dig deep ditch 0.5m, width 1.5, for rice crabs inhabiting the sun. A semi-meter high plastic film escape prevention wall is erected around the field ridge and is fixed with short bamboo rods. In the field of potting, it is necessary to close the herb before cutting and to apply enough basic fertilizer. More fertilizer should be applied to the soil (rough fertilizer contains many enzymes, which can promote the growth and reproduction of plankton in the water, and provide abundant fresh bait for the crab). Apply or not apply fertilizer. Paddy rice transplants should be ultra-thin or transplanted. To control rice pests and diseases in crab farming rice fields, we must use high-safety pesticides for crabs and take the correct method of pesticide application. After rice was transplanted and before the crabs were planted, fine arborvitae was introduced into the paddy field (variety is fine German arborvitae), and the amount was 750 kg per hectare with a coverage of 30%. At the same time, 2 water hyacinths were planted at every lm in the crab ditch for degradation. For example, water hyacinth can affect the growth and development of rice and can be removed at any time. In addition to feeding a small amount of synthetic crab material and feeding it once a day, the amount of feeding will be flexibly controlled according to the food intake of the crabs. July and August are the golden seasons for growth and development of crabs. Food intake is very large. For example, fine green ash in paddy fields can not meet the needs of river crabs, and some fine green arbors can be manually collected and put into paddy fields.
Third, management and fishing management personnel should constantly inspect crab-raising paddy fields, observe the activities of crabs, detect and repair leaks in time, eliminate predators such as rats, birds, frogs and snakes, and prevent crabs from escaping and being harmed. Change the water frequently in the hot season, it is best to water once a day sooner or later, each water l0cm deep.
Rice field crabs can be harvested by traps and sleeves during drainage before or during harvesting, or they can be trapped at night by the pool and captured by burrowing.
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