In 2004, the Jiangyin Aquatic Technology Guidance Station in Jiangsu Province introduced 20,000 fry yearlings. After more than two years of experimentation, all the indicators have reached the expected target. After summing up, I feel that in the trial of fish rearing, the preparatory work for Xiatang is not sloppy. The preparations for Ding Shuiyu Xia Tang are described below: 1. Dredging and trimming: after years of cultivation in the pond, sediments such as residual baits, feces, and bio-mortems, as well as large amounts of silt and organic matter at the bottom of the pond, and a large number of eggs, will affect the survival rate of the fry. Therefore, before the fry in the pond, it is necessary to dry the pond, dredging, freezing, or sun exposure for more than 1 week, and then perform the formation of the bottom of the pond, the repair of dikes, and the dredging of the drainage channels. 2. Substrate Disinfection: After the pond has been retouched and exposed, put a small amount of water (water depth: 20 cm). Use 150 kg of quicklime per mu to spray the whole pond evenly. (The key is to use fast lime. The operation must be done quickly. , get clean, splash fast, splash evenly. Wait 2 days to push the mud in the bottom of the pond with a pusher, and mix the surface lime into the pool mud. When the quicklime comes into contact with water, calcium hydroxide is generated, so that the pH value of the pool water is increased, which is beneficial to the reproduction of plankton and the growth of the fish, and also releases nitrogen, phosphorus, and potassium ions adsorbed by the sludge to make the water quality become fat. 3, water: calcium carbonate in contact with the air after the formation of calcium carbonate is a very good water quality regulator. Therefore, do not splash lime immediately into the water, generally stay in water after 1 week. Filter the water into a depth of 70-80 cm with a 60-mesh sieve. 4. Fertilization of water: There are data that the genus Cladocera is the most basic ration of the wild fish. When there are various Cladocera species in the water, the juvenile fish will grow faster. Therefore, the fertilizer submerged pond is the key. One week before the release of fish fry, 170 kg/mu of organic fertilizer fermented and fermented is applied. After dilution, the whole pool is splashed, and the water is filtered with a 60-mesh sieve to a depth of about 1.3 meters. After 1 week, the reproduction of plankton species such as cladocera, copepods, etc. in ponds reached a peak, and it was most suitable for seedlings to bloom at this time. 5. Disinfection of water bodies: Organic fertilizers are fast, but they are also prone to diseases. Therefore, after 5 days of culture, the water body should be disinfected with bleach 500 g/mu. 6. Test the water: Put a few dozen healthy and disease-free fry into the net cage for half a day before the seedlings are released. Observe whether the fry is normal to determine whether or not the young fish will be placed on the second day. 7, slow Miao: After the fry are shipped, do not rush to the next pond. Remove the fry bag and let it float for at least 10-15 minutes on the surface of the pond to eliminate excessive temperature differences. After opening the fish bag in a sheltered area, add a part of the pond water and let it rest for 1-2 minutes to perform gentle seedling treatment so that the fry can better adapt to the new environment. 8, fish disinfection under the pond. After the fish fry were treated with “slow seedlingsâ€, they were put into 2% concentration of salt water (diluted with fish seedlings pond water) and disinfected for 6-8 minutes before being placed in seedlings. When the pond is under the pond, place the container of the fry in a sheltered place and tilt it in the water to allow the fry to swim out automatically. Foot of ningxia hong xingda incense Organic Apple fruit suborbicular, fruit surface color yellow green, most with orange chardonnay fruit surface, covered with bright red stripes, pulp yellow-white, succulent crisp, sweet, rich fragrance, quality first-class; The fruit has a sugar content of over 15%, more than 4% of the national average, and the flesh is tight and crisp and sweet, which is widely loved by consumers all over the world. There is a longer optimal consumption date than any other apple, not even refrigerated. It can be kept for 4 months at normal temperature. If refrigerated, Fuji can be kept for 5--7 months. Red Fuji Apple,Red Fuji Selenium Apple,Thin Skin Apple,Fresh Red Fuji Fruit Ningxia hongxingda fruit industry , https://www.hxdfruit.com
Altitude: high altitude area light, clean air, environment close to original condition, no industrial pollution. With an average elevation of 1160-2900m, the central health center has a strong uv light, which produces the natural pollution-free apple, which conforms to the concept of a modern green diet.
Temperature: moderate temperature can avoid the chance of fruit tree encountering disease. The average temperature in ningxia is 8.4 degrees Celsius, which has an important influence on the growth, development, yield and quality of apple. The piedmont apple is thriving in such a good environment.
Humidity environment: moderate amount of rainfall provides necessary conditions for apple's growth. The annual rainfall in the central health region is 186 millimeters. The fruit is slow to grow and the fruit is hard and hard, which fully guarantees the fruit's sugar content and the relatively average size of apples.
Sunshine condition: apple is the fruit tree, the central health area of the whole year is nearly 3,800 hours, is beneficial to the Apple Fruit coloring. The piedmont apples are red and bright.
Temperature difference factors: ambassador apple nighttime respiration weak temperature gap between day and night, consume less organic matter, the accumulation of organic matter during the day more, that apple store down a large number of glucose sugar candy, etc have better taste. The average diurnal temperature difference between apple and apple is 14 degrees centigrade, and the larger diurnal temperature difference ensures the sweet and delicious characteristics of the apple.
Other factors: frost can make apple blossom and fruit, which can cause frozen flower jelly, which is bad for apple's production. The piedmont apple has been kept at least 167 days without frost for the whole year, which minimizes the influence of apple on yield and quality.