Frozen John Dory,Delicious John Dory,Fresh John Dory Skinless,Fresh Frozen John Dory Skinless Zhoushan Junwei Aquatic Products Co., Ltd. , https://www.junweiaquatic-intl.com
Rice-field shrimp farming in winter is a model for winter shrimp farming using paddy fields to cultivate harvested winter fish ditch. The breeding technology summarized by Xu Chengxu, the author of Jinhu County, Jiangsu Province, is introduced as follows:
I. Timely rearing of paddy fields After harvesting, immediately select some paddy fields with deeper water depths and better conditions, excavate excess silt in the fish ditch, renovate and reinforce the field ridges, and inject fresh river water. For example, if rape or wheat is to be planted in the paddy fields, the water level in the fish cans can be maintained at 1.2m; if no rapeseeds or wheat are grown, the whole paddy field can be used to grow the shrimp. Each canal with 2 to 25 thousand tails can be stocked on the water level of the fish ditch, and the specification is 1.5-2.5cm. The stocking time is better in mid-late December.
Second, the full amount of bait shrimp can feed throughout the winter growth, in the bait, to grasp two, with the middle. That is to say, 15-20 days after stocking of shrimps should be seized, mainly concentrates should be casted. The daily feed amount can be calculated as 5% of the body weight of shrimps, and in January-February, it should be fed in the sunny and warm weather at noon. Some foods are available; starting in March, the ingestion intensity of the shrimp gradually increased, and the daily feeding amount was 3%-5%; in April, it increased to 6%; in May, it was the price of green shrimp spawning and was also blue. In the fastest season of shrimp growth, the amount of daily feeding can be increased to 8%, and it can be fed 3-4 times a day, striving to make the size of the shrimp reach 5cm or more in late May.