People concerned have suggested that farmers should try tender seedlings. How can we judge the emergence of "old" and "soft"?
In the case of common homes, for instance, when the incubation water temperature is maintained at 22°C to 25°C, fertilization from mature eggs to the waterflood takes about 20 hours to 24 hours. Before the intestine is fully penetrated, the spray depends on the yolk sac to provide the energy needed for development. This stage is called the “endogenous growth phaseâ€. This process lasts for about 72 hours, and the fry enters the “exogenous growth period†of active feeding. ".
If the "endogenous vegetative period" and "exogenous growth period" of the fry respectively correspond to the "old" and "tender", the fry should undoubtedly be "tender" before entering the "exogenous growth period". . Therefore, if you want to put “soft†seedlings, the time spent on the pond should be strictly controlled within 3 days or 3 and a half days after the film is released. Can this node move forward without restrictions? For example, when the film came out of the pond, the answer is no. Strictly speaking, "endogenous trophic period" and "exogenous growth period" are actually a relatively general division of the early life history of fry. Between the period of "endogenous vegetative period" and "exogenous growth period", there should be a time when the fry can both digest and assimilate the yolk sac and try to ingest it, so it is called "mixed nutrition". period".
According to some practical experiences, the batch with the highest survival rate in Xiatang is often in the “mixed nutrition periodâ€. If divided by time, it will be about 2.5 days to 3 days after the film is sprayed. If this conclusion is applied to actual production, the most suitable packing time for hairy ponds in nearby ponds should be from the 2.5th day to the 3rd day after the film is out; if short-distance transportation (≤ 5 hours) is required, the packing time should be selected. In the 2nd to 2.5th days after the film is out; if it needs long-distance transportation (≥10 hours), then the packing time should be advanced again to prevent the fry from passing the “irreversible point†during the transit of oxygen bags.
Shandong Chunyu Water-saving Irrigation Equipment Co., Ltd., founded in 2011, is located in Laiwu High-tech Zone, Jinan City. It is a high-tech enterprise focusing on innovative and efficient emitter mold manufacturing and emitter product research and development and production. After nearly ten years of innovation and development, it is the invisible champion enterprise in Shandong Province, and now it is in a leading position in this field in China.
Spring rain people-oriented, build talent highland. At present, the company has 16 high, fine and advanced technical personnel, and cooperates with a number of scientific research institutes, forming a mold design, emitter testing, flow testing and other professional technical personnel team. In recent years, it has obtained 3 invention patents, 33 utility model patents and 3 patent awards. In 2019, it was identified as an intellectual property advantage enterprise in Jinan. It has undertaken 4 provincial science and technology innovation projects and won 2 second prizes of Shandong Science and Technology Progress Award. The company has built Jinan drip emitter mold engineering technology research center, the company has a slow wire cutting, CNC machining center, precision EDM machine, 3D projection measuring instrument, CNC engraving, laser engraving and other advanced processing equipment. Mature technology and rich experience support the excellent quality of Chunyu. Spring Rain pays attention to every link of production, implements 8S management, strictly controls the quality of products at the beginning, the middle and the end, and forms the seamless link of production management. The company has independently researched and developed flat emitter molds with full hot runner, cylindrical emitter molds with full hot runner and other products. With excellent quality, competitive price and good after-sales service, the company is well known at home and abroad, and has been sold well in Egypt, India, Iran, Turkey, Saudi Arabia, the United States and other countries.
With the vision of "building a global professional emitter mold supplier" and the mission of "providing solutions for efficient and innovative production of global water-saving irrigation enterprises", the company takes "scientific and technological innovation to scale new heights; Keep improving, the pursuit of excellence; Honesty and trustworthiness, win-win cooperation "for the values of the enterprise. For the construction of water - saving and resource-saving society to make a positive contribution.
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