Biogas fertilizer is an organic substance that uses farm man's livestock and manure, various straws and garbage, and is sealed in a biogas digester and fermented at high temperature. It can not only provide people with methane (methane) for lighting and fuel, but also provide for fish farming. Feed source. The biogas fertilizer technology will be introduced as follows.
1. The pond has sufficient water sources, good water quality, convenient water injection and drainage, good surrounding environment, good ventilation, convenient transportation, an area of ​​0.333-0.666 hectares, water depth of 1.5-2 meters, and inlet and outlet installations. Fish facilities to prevent fish from escaping.
Second, fish stocking (a) the choice of fish species. To select the fish body is fat, disease-free, injury-free, clear and bright body surface, complete scales, swimming lively fish species. The size of the fish species to be placed is larger, and the large-size species of fish have strong disease resistance, high survival rate, and rapid growth. The stocking season is early, and early stocking, early eating, and early growth are required.
(b) Stocking species and density. The stocking species must be dominated by filter-feeding fish such as cockroaches and cockroaches, together with appropriate amount of omnivorous fish. The general population accounted for 65% of the total population, the population accounted for 15%, and the omnivorous species such as cockroach, clam and tilapia each accounted for about 7%. Each 0.067 ha stocking body length of 16 cm fish species 700-1000 tail.
(c) disinfection of clear ponds. In front of the fish ponds and ponds, the ponds are to be disinfected. Each 0.067 hectare uses quick-calming 70-100 kilograms, and it is best to spread the entire pond on sunny days to kill the enemy and pathogens.
(d) Fish stocking. Due to the different degrees of scratches and infections that occur during fishing and transportation, unsterilized fingerlings can easily bring new pathogens into a fish pond that has been sterilized. Therefore, before stocking, fish should be soaked with 2.5% salt solution for 10-15 minutes.
Third, the requirements of biogas fertilizer fish (A) fish ponds and biogas tanks supporting. Generally, a 100 square meter fish pond is equipped with a 0.2-0.3 cubic meter digester, and several biogas digesters are to be used for rotation.
(b) The time of fermentation in the digester. Generally speaking, after the fertilizer is put into the biogas digester, after 1 month, the available nitrogen and phosphorous contained in the biogas fertilizer reach the peak. At this time, the biogas fertilizer is applied to the fish pond, and the fertilizer effect is the best.
(C) the amount of biogas fertilizer. Biogas manure is a quick-acting fertilizer and should be applied to the principle of "less time and more time". Generally, one-time daily fertilization is performed, and each kilogram of fish will be fertilized with 5 kilograms each time. If the weather is hot and the transparency of the water color is below 25 cm, it can be applied once a day or several days. In the process of use, the transparency of the water color should not be less than 20 centimeters, and it should be controlled under 25 centimeters in the summer and early autumn, and 25 centimeters in the late fall. The use of biogas fertilizer should be carried out at 8-9 o'clock in the morning on sunny days. Do not fertilize it on rainy days or when the fish floats. Fish should be given less fertilizer.
Fourth, the advantages of marsh fish aquaculture (a) stable and appropriate pH. Water pools that use biogas can often be in a neutral state. The pH of the biogas fertilizer is 7.2-7.8, which is the same as the PH value of the high-yielding fish pond. The continuous injection of biogas fertilizer can stabilize the PH value of pool pond water in a neutral state, which is suitable for fish growth and development.
(b) The incidence of pond fish is low. After the biogas fertilizer is sealed, high temperature, and fermented, the pathogens and parasites in the feces are killed. Moreover, due to the low oxygen consumption of marsh, the incidence of pond fish can also be greatly reduced, and the survival rate is greatly improved.
Biogas fertilizer is rich in nutrients, containing nitrogen, phosphorus, potassium and inorganic salts. After the application of biogas fertilizer, the water color of the pool water will turn green after 3-5 days, and the plankton breeding will be faster. The received sunlight and calories will increase, and the oxygen content and water temperature will also increase, which will be beneficial to the growth of fish.
(3) Comprehensive utilization of livestock waste. The use of biogas fertilizers provides a wide range of inputs, low cost, and high profitability. At the same time, due to the full use of fertilizers, it can replace a large amount of concentrate feed and reduce environmental pollution. Economic, social and ecological benefits are significant.
1. The pond has sufficient water sources, good water quality, convenient water injection and drainage, good surrounding environment, good ventilation, convenient transportation, an area of ​​0.333-0.666 hectares, water depth of 1.5-2 meters, and inlet and outlet installations. Fish facilities to prevent fish from escaping.
Second, fish stocking (a) the choice of fish species. To select the fish body is fat, disease-free, injury-free, clear and bright body surface, complete scales, swimming lively fish species. The size of the fish species to be placed is larger, and the large-size species of fish have strong disease resistance, high survival rate, and rapid growth. The stocking season is early, and early stocking, early eating, and early growth are required.
(b) Stocking species and density. The stocking species must be dominated by filter-feeding fish such as cockroaches and cockroaches, together with appropriate amount of omnivorous fish. The general population accounted for 65% of the total population, the population accounted for 15%, and the omnivorous species such as cockroach, clam and tilapia each accounted for about 7%. Each 0.067 ha stocking body length of 16 cm fish species 700-1000 tail.
(c) disinfection of clear ponds. In front of the fish ponds and ponds, the ponds are to be disinfected. Each 0.067 hectare uses quick-calming 70-100 kilograms, and it is best to spread the entire pond on sunny days to kill the enemy and pathogens.
(d) Fish stocking. Due to the different degrees of scratches and infections that occur during fishing and transportation, unsterilized fingerlings can easily bring new pathogens into a fish pond that has been sterilized. Therefore, before stocking, fish should be soaked with 2.5% salt solution for 10-15 minutes.
Third, the requirements of biogas fertilizer fish (A) fish ponds and biogas tanks supporting. Generally, a 100 square meter fish pond is equipped with a 0.2-0.3 cubic meter digester, and several biogas digesters are to be used for rotation.
(b) The time of fermentation in the digester. Generally speaking, after the fertilizer is put into the biogas digester, after 1 month, the available nitrogen and phosphorous contained in the biogas fertilizer reach the peak. At this time, the biogas fertilizer is applied to the fish pond, and the fertilizer effect is the best.
(C) the amount of biogas fertilizer. Biogas manure is a quick-acting fertilizer and should be applied to the principle of "less time and more time". Generally, one-time daily fertilization is performed, and each kilogram of fish will be fertilized with 5 kilograms each time. If the weather is hot and the transparency of the water color is below 25 cm, it can be applied once a day or several days. In the process of use, the transparency of the water color should not be less than 20 centimeters, and it should be controlled under 25 centimeters in the summer and early autumn, and 25 centimeters in the late fall. The use of biogas fertilizer should be carried out at 8-9 o'clock in the morning on sunny days. Do not fertilize it on rainy days or when the fish floats. Fish should be given less fertilizer.
Fourth, the advantages of marsh fish aquaculture (a) stable and appropriate pH. Water pools that use biogas can often be in a neutral state. The pH of the biogas fertilizer is 7.2-7.8, which is the same as the PH value of the high-yielding fish pond. The continuous injection of biogas fertilizer can stabilize the PH value of pool pond water in a neutral state, which is suitable for fish growth and development.
(b) The incidence of pond fish is low. After the biogas fertilizer is sealed, high temperature, and fermented, the pathogens and parasites in the feces are killed. Moreover, due to the low oxygen consumption of marsh, the incidence of pond fish can also be greatly reduced, and the survival rate is greatly improved.
Biogas fertilizer is rich in nutrients, containing nitrogen, phosphorus, potassium and inorganic salts. After the application of biogas fertilizer, the water color of the pool water will turn green after 3-5 days, and the plankton breeding will be faster. The received sunlight and calories will increase, and the oxygen content and water temperature will also increase, which will be beneficial to the growth of fish.
(3) Comprehensive utilization of livestock waste. The use of biogas fertilizers provides a wide range of inputs, low cost, and high profitability. At the same time, due to the full use of fertilizers, it can replace a large amount of concentrate feed and reduce environmental pollution. Economic, social and ecological benefits are significant.
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