First, stocking of high-quality shrimp is an important guarantee for raising the survival rate and high yield of shrimp. When purchasing seedlings, you should choose healthy and lively, slender body, uniform size, clean surface, full muscles, full bowel, sensitive to external stimuli, obvious directional when swimming, body transparency, no body The diseased shrimp should be tested for viruses if possible to ensure it is free of viruses. At the same time assisted with the water resistance test method to identify high quality shrimp seedlings.
The second is timely release of seedlings, the use of Tangkou scattered gradually dilute the crude technology. In the aquaculture ponds, 3%~5% of the small water area was sealed with a plastic film, and 3 to 4 ‰ low-salt water bodies were prepared. The saplings were desalted and the desalinated density was 1200 to 1500 per square meter. After approximately half a month of gradual dilution, the crude shrimp was grown to a length of about 2 cm and gradually put into a pond for breeding. The pond culture density was about 70,000 tails per mu.
Third, the regulation of water quality, we must first control the color, the ideal color of the breeding of South American white shrimp is formed by green algae or diatoms, yellow-green or yellow-brown, in the cultivation process must be consciously controlled to achieve this ideal color. Such as thin water ponds early release of organic fertilizer, top dressing depending on the pond water transparency, pH, water and other flexible grasp, top dressing once a week. Due to the increase of fecal matter in the bait and shrimp during aquaculture, the color of the water becomes darker, and water can be controlled by changing the amount of water or applying a certain amount of quicklime. At the same time, microecological preparations such as photosynthetic bacteria, EM biologically active bacteria, and water can be used in shrimp ponds to degrade organic substances, such as residual baits, in the water in a timely manner, reducing oxygen consumption and stabilizing pond water color. Followed by the regulation of pH and dissolved oxygen in the pool water, the suitable pH value of P. vannamei is 7.8-8.5, which can be adjusted by regular quicklime. The amount of dissolved oxygen was adjusted by turning on the aerator to ensure that the dissolved oxygen in the pool was above 5 mg/l and the dissolved oxygen in the bottom of the pond was above 3 ml/l.
The fourth is scientific feeding. In the production, the feed is generally fed with the full-price compound of South American white shrimp. The amount of feed depends on the combination of shrimp size, survival rate, water quality, weather, etc., and the medium to medium-term (shrimp body length is 3 cm to 8 cm). The amount of bait is 6% to 8% of the shrimp weight, and the rearing period (length of the shrimp is more than 8 cm). The daily feeding amount is 4% to 5% of the shrimp weight. Feeding twice a day, the feeding period was 7 points and 19 points respectively; the night feeding amount accounted for 50% of the total amount of daily feeding. The feeding method is even feeding along the edge of the pool.
The fifth is to strengthen the prevention and treatment of diseases. In the production, we insist on prevention as the main thing. First, we must do a good job in the regulation of pond water quality. This is the key to preventing and controlling shrimp disease. Secondly, water disinfection and insecticide were performed. In June and August, dibromohydantoin and avermectin were used to sterilize and kill insects respectively, which effectively controlled the occurrence of diseases.
Sixth, strengthen management and establish Tangkou archives. The production personnel in the production must record the water temperature, feeding, medication and shrimp growth in time, collect relevant technical data and materials, and establish a breeding pond archive so that the feeding and management can be timely adjusted according to specific conditions, and also provide experience for the next year's breeding.
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.
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.
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Ningxia hongxingda fruit industry , https://www.hxdfruit.com