According to the suitable living environment and growth characteristics of crabs, using the growth characteristics of crabs to develop polyculture of fish and crab ditch is undoubtedly an effective way to improve the economic benefits of crab breeding.
1. River ditch conditions. In order to select clean and unpolluted river channels, the average annual water depth is maintained at about 1 to 2 meters. The best soil quality is clay or sandy loam with good ventilation performance, which is conducive to the growth of aquatic weeds and reproduction of benthic animals. The silt thickness in the trench should not exceed 0.2 meters. .
2. Seed feeding. Under normal circumstances, in April-May each year to buy back the artificial breeding of v young crab, the size of the specification is about 1 kg 2000, the crab species of 150 to 300 per mu water surface.
3. Feeding management. Under normal conditions, there are abundant aquatic plants and benthic animals in the river ditch, which can meet the growth and feeding requirements of the river crab and do not need to be fed artificial diet. Due to the large surface area of ​​the river and the small stocking density of the fish, the dissolved oxygen in the water can meet the growth needs of the river crab. The ph value of the water body should be maintained at 7-9. If the ph value of the water body is low, quicklime can be used to prevent the death of the clam shell from occurring during crab growth. The patrols of the boundary water surface are frequently inspected. The first is to require that the blockage between the blockade and the outside world must be tight and free of loopholes to prevent the river crabs from escaping from the water's edge or the bottom of the trench. It is best to add barriers between the two layers of reversed networks. The second is to require surface mesh. The attached film must be undamaged to prevent crabs from flanging and fleeing.
4. Crab fishing. The time to market for crabs is mainly after mid-September of each year, and a large number of fixed nets (such as cage nets, shrimp nets, etc.) are generally used for fishing. After mid-September, the gonads of crabs mature and begin to migrate. Since the river ditch cannot be surrounded by the river, it is imperative to increase the fishing intensity of river crabs in the river ditch, and to set more fishing nets for shrimps, cage nets and other crabs.
1. River ditch conditions. In order to select clean and unpolluted river channels, the average annual water depth is maintained at about 1 to 2 meters. The best soil quality is clay or sandy loam with good ventilation performance, which is conducive to the growth of aquatic weeds and reproduction of benthic animals. The silt thickness in the trench should not exceed 0.2 meters. .
2. Seed feeding. Under normal circumstances, in April-May each year to buy back the artificial breeding of v young crab, the size of the specification is about 1 kg 2000, the crab species of 150 to 300 per mu water surface.
3. Feeding management. Under normal conditions, there are abundant aquatic plants and benthic animals in the river ditch, which can meet the growth and feeding requirements of the river crab and do not need to be fed artificial diet. Due to the large surface area of ​​the river and the small stocking density of the fish, the dissolved oxygen in the water can meet the growth needs of the river crab. The ph value of the water body should be maintained at 7-9. If the ph value of the water body is low, quicklime can be used to prevent the death of the clam shell from occurring during crab growth. The patrols of the boundary water surface are frequently inspected. The first is to require that the blockage between the blockade and the outside world must be tight and free of loopholes to prevent the river crabs from escaping from the water's edge or the bottom of the trench. It is best to add barriers between the two layers of reversed networks. The second is to require surface mesh. The attached film must be undamaged to prevent crabs from flanging and fleeing.
4. Crab fishing. The time to market for crabs is mainly after mid-September of each year, and a large number of fixed nets (such as cage nets, shrimp nets, etc.) are generally used for fishing. After mid-September, the gonads of crabs mature and begin to migrate. Since the river ditch cannot be surrounded by the river, it is imperative to increase the fishing intensity of river crabs in the river ditch, and to set more fishing nets for shrimps, cage nets and other crabs.
To increase Animal Nutrition; mainly used to supple the body needs such as a variety of vitamins, minerals, increase the body disease resistance and immunity.;Mainly including injection .powder.tablet.solution,stc.Usually used in the form of injection or oral,ntravenous injection, intramuscular injection, subcutaneous injection, etc.used in Horse, cattle, sheep, pig, dog, cat and rabbit.
For veterinary use only.
Keep out of the reach of chlidren. the package generally bottled Then pretend to box packing,then the carton
Animal Nutrition Medicine,Animal Nutrition,Nutritional Supplements,Chicken Nutrition
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