A seedbed or seedling bed is the local soil environment in which seeds are planted. Often it comprises not only the soil but also a specially prepared cold frame, hotbed or raised bed used to grow the seedlings in a controlled environment into larger young plants before transplanting them into a garden or field. A seedling bed is used to increase the number of seeds that germinate. Greenhouse Seedling Bed,Stainless Greenhouse Seedling Bed,Greenhouse Seedling Nursery Bed JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , http://www.spgreenhouse.com
In 2005, we had 30 mu of fry cultivation pool. Through multi-season cultivation, 15.5 million fish fry were propagated throughout the year, 5.3 million fish were cultivated, and 176,000 fish were cultivated per mu, which was more than double the number of previous years.
Second, the combination of pond and cage cultivation
Under normal conditions, 1,500 kg of 9-10 cm fingerling species will be cultivated per acre of ponds, that is, fry stocking volume will be 40,150 to 50 thousand fish per acre. The combination of ponds and cage cultivation can effectively increase the stocking of fry in ponds, that is, the fry stage. In pond cultivation, 200,125 thousand watercress can be released per acre pond. When it is cultivated to 4-5 centimeters, it can be timely moved into the reservoir net cage to carry out the breeding stage. The 5 meters X5 meters cage can put about 10,000 fry. When the fingerlings grow to 9-10 cm in size, they can be sold in time or divided into boxes for adult rearing. Each box can produce 2500 kg of fish. This will not only reduce the load on ponds, increase the turnover rate of ponds, but also increase the number of fry in ponds. .
III. Combination of Pond Cultivation and Fostering of Winter Fields
According to statistics, the annual average of 10,000 hectares of soaked winter fields in our state is left. In October, rice harvesting is idle until May of the following year. Most of the winter-free fields are ecological fishery rice fields. Digging fish melons and turtle ditch is very beneficial to the cultivation of fry. In combination with the season of rice harvest, the ponds will be breeding in autumn at the end of August and early September. After 30-45 days of cultivation in ponds, the fry will grow to 3-4 inches. After the rice is harvested, the field will be raised in time and the base fertilizer will be applied to the paddy field. - 4-30 cm fry 3000-3500, from October to the end of November with the full price pellet feed for intensive cultivation, making it safe to overwintering 6-7 cm specifications, in March next year to strengthen cultivation, in May reached 10 cm specifications, Available for stocking needs in the coming year. In 2005, our field used the autumn fish fry to test fish seedlings cultivated in winter fields, and cultivated an area of ​​20 mu. On October 8, 2005, a total of 63,000 fish were reared in autumn (3-4 centimeters), and the average breeding stock was 3,150 fish. 2006 Harvested on May 24th of the year, the test production was 4.7 acres: acceptance, 13316 fish species were collected, 2833 fish were harvested per mu, average individual 31.3 g, and yield per mu was 88.67 kg.
To sum up, a reasonable arrangement of ponds and cornices, to take full advantage of China's natural climatic conditions, organically combine ponds with cages and winter-free fields, to breed multi-season fry, effectively increase the number of fry in ponds, increase the income of ponds, and at the same time It can meet the needs of the fishery production for the seedlings.
How to increase the yield of pond trout fry
I. Reasonably arrange the ponds to evacuate and use the natural conditions to cultivate multi-season fry. Because the temperature in the early spring of our province slowly rises, the temperature of the water in the middle and late April is stable above 16°C. Therefore, the fry reproduction in our province can only proceed normally in the middle and late April. The time spent on ponds is wasted, and at the same time, due to the short incubation time, the specifications required for the corpses are often not reached. According to this actual situation, our field makes full use of modern traffic conditions and China's climate resources: sources, and reasonably arranges the cultivation of fish fry in ponds. In the early spring season (ie early March), we introduce southern winter (Guangdong, Guangxi) winter or fingerlings. Intensive cultivation. In March 2005, my field withdrew 3 million fish fry from Guangxi and used Tongwei feed to carry out intensive cultivation. In May, we can provide 8884 kg of fish species for the paddy field ecological fishery project. In late April, we will raise some ponds from the concentrated fish fry. When the fish is sold outside, the ponds will be fortified and cultivated in a timely manner. In June, 6-8 cm can be sold. July-September is the off-season sales of fry. During this period, the crayfish fry are intensively cultivated as fish sales, while the rest of the ponds are bred in the summer. After 2 months, 6-8 cm is available for cage or reservoir turtles. In the beginning of September, the young fishes will be bred again in autumn and the winter turtles will be cultivated to prepare for the next year's production. In this way, more seasoned fry species can be cultivated, which will effectively increase the yield of fry in ponds.