First, artificial breeding
1. Broodstock breeding ponds are cultivated. Starting in March each year, females are selected for 2-3 years of age, males are 1-2 years old, and the ratio of male to female is 1:1.2.
The top of the red genuine sarcoma sarcoma is selected, other irregularities such as yellow and white are generally not selected. The stocking density is smaller than that of commercial fish, and the amount of feeding increases gradually with the warming of the weather. It usually takes 1 month for the gonads to mature.
2, the choice of broodstock
In the first half of April, the gonads can be selected from the cultivating pool. The abdomen is soft and elastic, and the body is oval. The genital micro-infrared females are used as female parents. The bodybuilder, the cover-covered fins are full of star-chasing males as male parents.
3, artificial oxytocin artificial oxytocin is generally selected in mid-April, the water temperature of 25 degrees is appropriate, using a disposable pectoral fin injection method. For every 100g of females, the luteinizing hormone-releasing hormone analogue (LRH-A2) is 1-2ug and the male fish is halved. The injection time was chosen around midnight, and the squatting time was 18-20 hours.
4. Artificial insemination and hatching At the same time in the evening, observe and observe that when male fish are found in the intense pursuit of the female fish, the male and female fish are immediately caught in a pot filled with water, and the milk is gently squeezed and the abdomen has milky white mucous or yellow eggs. Artificial insemination. One person's left hand grasps the female's head and trunk, and the right thumb and index finger gently squeeze the abdomen, and the extruded fish eggs are evenly discharged into a sterile magnetic basin (the basin is pre-added with a little 25 degrees of normal saline). Squeezing males quickly. One person dipped in physiological saline with a cotton ball to disinfect the broodstock, and at the same time dried water droplets on the operator's hand. Stir with feathers for 1 minute. Sprinkle the fertilized eggs evenly in the hatchery with the ovary.
During incubation, it requires the use of clean, non-polluting water, adequate dissolved oxygen, a pH of 7.5-8.0, and a membrane that can be incubated within 3-4 days at a water temperature of 25 degrees. During this period, it was mainly to prevent watery mildew, splashing 10ppm of malachite green solution into the pool every day and paying attention to the fresh water.
Second, seedlings and bred freshly hatched larvae rely on their own yolk to live. After 4 days, use two layers of 25# plankton nets to pour the cooked eggs and pat them gently on the water so that the egg yolks are uniformly suspended in water. . Feed once a day, the amount of feeding for 1 to 1.5 hours to eat, 8 days later, larvae grow to 1CM or more, swimming enhanced, small plankton to eat, to grow to 3CM, change the water once a week Can feed some larvae bait.
Third, discuss the advantages of artificial insemination Artificial insemination can greatly reduce the broodstock 8-10 hours chasing physical energy consumption, reduce the death of broodstock, practice has proved that the survival rate of postpartum broodstock by natural mating from 50% -75% to 95% Above, and the natural fertilization rate is generally not more than 40%, and artificial insemination can reach more than 80%, and at the same time, it can also ensure that the variety is pure.
Note: The fish nest should be suspended in the middle and upper layers of the water, and the weights can be attached to both sides. The upper layer is lifted and fixed in the hatching pool. If the fish nest emerges from the water, the fertilized eggs will be exposed to the sun and they will sink to the bottom. Excessive pressure suffocates. Eggs during the incubation process, especially during the period of 1-3, must not turn the eggs at will, otherwise it will reduce the hatching rate, and easy to generate freaks.
(Southwest Agricultural University Department of Fisheries Yu Xiaodong)
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Appearance
1) Color: Orange or orange red.
2) Taste & Odor: Fresh Goji Berry juice taste and smell after sterilization, no peculiar smell.
3) Histomorphology: The product is turbid, allowing precipitation stratification after standing.
4) Impurity: No visible foreign impurities.
Physics & Chemical Specification
1) Brix(%): ≥13.0
2) Total Acid(g/100mLas Citric Acid): ≥0.5
3) pH: 3.5-4.5
Microorganism Specification
1) TPC (CFU/mL): ≤20
2) Yeast (CFU/mL): ≤20
3) Mould (CFU/mL): ≤1
4) Coliform (CFU/mL): ≤1
Additive
Citric acid and Vitamin C
Country of Origin
ZHONGNING, NINGXIA, CHINA
Package
1) Inner package is 200kgs aseptic bag, outer package is opening steel drum.
2) Inner package is 25kgs aseptic bag, outer package is opening steel drum.
Storage
Should be stored at room temperature in clean, cool, dry warehouse, prevent sun, rain, and not be stored with corrosive, toxic, and smelly item. With these conditions, product shelf life is 18 months. (suggestion: 5-8℃).
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