Hexi breeding technology series (3)
---- Breeding Technology
1, to master the season: the river raft at the peak of reproduction gonad fullness. High fertilization rates, high hatching rates, and high rates of larval metamorphosis can yield high yields; otherwise it will affect yield.
2, choose a good pro 蚬 . Physically strong, disease-free and injury-free. The complete shell is intimacy.
3, artificial oxytocin: The selected pro 蚬 washed after Sheng in the pot or pool. Using dry stimulation, flowing water stimulation, and proper combination of chemical stimuli can induce spawning and spawning.
4, improve the fertilization rate of operation technology.
4.1 Necessary glands with well-developed selective glands, such that the excreted sperm are active and fertile.
4.2 When the urine production is properly increased, the fertility of the inbreeding stock is increased, and the sperm and eggs are arranged in a row, which increases the fertilization rate of the sperm and eggs.
4.3 After excretion of sperm and eggs, use your hands to gently stir to help the eggs and eggs more contact.
4.4 If there is too much sperm, it will affect the normal development of fertilization and embryos can use egg washing liquid to kill part of the sperm and increase the fertilization rate. See Table 1
Table 1: Effects of egg washing liquid on fertilization rate Number of developmental examinations Number of developmental normal necrosis and fertilization (post-sac)
Add egg washing liquid 100 78 22 78%
Without washing liquid 100 60 40 60%
5 Operational techniques to increase hatching rate Eggs begin to split after fertilization and are split into two cells by one cell. Four-cell, eight-cell, multi-cell, mulberry, blastocyst, primitive gut, and early turf-working worms, larvae reptiles, hatch a membrane. In this process of embryonic development, it is necessary to create a suitable ecological environment for it, otherwise it will be deformed, or it will fail to develop normally. Oxygen in running water, suitable temperature control, and proper application of hatching agent can significantly increase the hatching rate. See Table 2
Table 2: Influence of hatching agent on hatching rate by group sampling Counting the number of membranes Decomposition number Hatching rate (%)
2 hours after fertilization, add 80 49 31 61.48
5 hours after fertilization 80 61 19 76.25
Not added 80 31 49 38.75
(control group)
6 Raise the metamorphosis rate of the larvae up to the breeding technique of the seedlings The flannel larvae will be able to make rolling movements after they are filmed. After gradually removing body contaminants, they will start eating. Afterwards, it gradually turns into a double-shelled larvae, and then disappears from the basin and grows axe, cockroach, mantle, heart and intestine. It takes about 5 to 7 days to complete metamorphosis, which is a very complicated life activity. In particular, during the larval stage of replenishing larvae, the egg membrane was originally protected within the egg membrane. When the bivalves did not grow after the membrane was formed, the embryo body was completely exposed in the water, and the carelessness of the larvae was disregarded. We did a few hundred trials before we tried to make it live and become metamorphosed into basin larvae. The technical measures for cultivation were:
6.1 The water needs to be precipitated and filtered with a dense mesh sieve to filter out predator organisms and contaminants such as large animals, fish and shrimp eggs.
6.2 Frequent use of lime to kill bacteria in water;
6.3, using running water to supplement the oxygen in the cultivation pool, pay attention to the temperature difference is not greater than 2 °C;
6.4. Adhere to feeding three times a day for the growth of larvae, see Table 3.
Table 3: Effect of bait on the metamorphosis of larvae to seedlings Metamorphosis of larvae Temperature (°C)
After the film is not fed 18 disintegration 22 ~ 24
After the film is cast, the plant sap 28 is disassembled 22 to 24
After the film is taken, the artificial live bait 5 to 7 is transformed and transformed into a seedling 22 to 24
6.5 Drain the bottom of the pool every day. The tank bottom is gently stirred by hand. Use micro-flowing water to flush away any contaminants floating in the water so as not to oversink the larvae and seedlings.
6.6 Timely replenishment of river mud, when the basin larvae metamorphose up to the bottom of the seedling camp, it is necessary to add some mud to the bottom of the seedlings when they change from the swimming life to the benthic crawling life. The need to supplement minerals can also avoid enemy damage.
1, to master the season: the river raft at the peak of reproduction gonad fullness. High fertilization rates, high hatching rates, and high rates of larval metamorphosis can yield high yields; otherwise it will affect yield.
2, choose a good pro 蚬 . Physically strong, disease-free and injury-free. The complete shell is intimacy.
3, artificial oxytocin: The selected pro 蚬 washed after Sheng in the pot or pool. Using dry stimulation, flowing water stimulation, and proper combination of chemical stimuli can induce spawning and spawning.
4, improve the fertilization rate of operation technology.
4.1 Necessary glands with well-developed selective glands, such that the excreted sperm are active and fertile.
4.2 When the urine production is properly increased, the fertility of the inbreeding stock is increased, and the sperm and eggs are arranged in a row, which increases the fertilization rate of the sperm and eggs.
4.3 After excretion of sperm and eggs, use your hands to gently stir to help the eggs and eggs more contact.
4.4 If there is too much sperm, it will affect the normal development of fertilization and embryos can use egg washing liquid to kill part of the sperm and increase the fertilization rate. See Table 1
Table 1: Effects of egg washing liquid on fertilization rate Number of developmental examinations Number of developmental normal necrosis and fertilization (post-sac)
Add egg washing liquid 100 78 22 78%
Without washing liquid 100 60 40 60%
5 Operational techniques to increase hatching rate Eggs begin to split after fertilization and are split into two cells by one cell. Four-cell, eight-cell, multi-cell, mulberry, blastocyst, primitive gut, and early turf-working worms, larvae reptiles, hatch a membrane. In this process of embryonic development, it is necessary to create a suitable ecological environment for it, otherwise it will be deformed, or it will fail to develop normally. Oxygen in running water, suitable temperature control, and proper application of hatching agent can significantly increase the hatching rate. See Table 2
Table 2: Influence of hatching agent on hatching rate by group sampling Counting the number of membranes Decomposition number Hatching rate (%)
2 hours after fertilization, add 80 49 31 61.48
5 hours after fertilization 80 61 19 76.25
Not added 80 31 49 38.75
(control group)
6 Raise the metamorphosis rate of the larvae up to the breeding technique of the seedlings The flannel larvae will be able to make rolling movements after they are filmed. After gradually removing body contaminants, they will start eating. Afterwards, it gradually turns into a double-shelled larvae, and then disappears from the basin and grows axe, cockroach, mantle, heart and intestine. It takes about 5 to 7 days to complete metamorphosis, which is a very complicated life activity. In particular, during the larval stage of replenishing larvae, the egg membrane was originally protected within the egg membrane. When the bivalves did not grow after the membrane was formed, the embryo body was completely exposed in the water, and the carelessness of the larvae was disregarded. We did a few hundred trials before we tried to make it live and become metamorphosed into basin larvae. The technical measures for cultivation were:
6.1 The water needs to be precipitated and filtered with a dense mesh sieve to filter out predator organisms and contaminants such as large animals, fish and shrimp eggs.
6.2 Frequent use of lime to kill bacteria in water;
6.3, using running water to supplement the oxygen in the cultivation pool, pay attention to the temperature difference is not greater than 2 °C;
6.4. Adhere to feeding three times a day for the growth of larvae, see Table 3.
Table 3: Effect of bait on the metamorphosis of larvae to seedlings Metamorphosis of larvae Temperature (°C)
After the film is not fed 18 disintegration 22 ~ 24
After the film is cast, the plant sap 28 is disassembled 22 to 24
After the film is taken, the artificial live bait 5 to 7 is transformed and transformed into a seedling 22 to 24
6.5 Drain the bottom of the pool every day. The tank bottom is gently stirred by hand. Use micro-flowing water to flush away any contaminants floating in the water so as not to oversink the larvae and seedlings.
6.6 Timely replenishment of river mud, when the basin larvae metamorphose up to the bottom of the seedling camp, it is necessary to add some mud to the bottom of the seedlings when they change from the swimming life to the benthic crawling life. The need to supplement minerals can also avoid enemy damage.
This system controls climate conditions,fresh air,humidity and temperature in poultry shed,it's vital for growing birds. This system include poultry house fan, Air Inlet window.
Fan depend on the input mechanical energy, improve the pressure side by side to send gas machinery, it is a kind of driven fluid machinery.Exhaust pressure below 1.5 x 10 mpa, the working principle of the ventilator and turbine compressor basic same, according to the direction of the gas flow, the ventilator can be divided into centrifugal, axial flow, oblique flow and cross flow type.
Hen House Special Cooling Fan,Hen House Cooling Fan,Cooling System Exhaust Fan,Animal Husbandry And Fan
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