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Method for improving overwintering survival rate of limnodrilus hoffmeisteri

A technology of water silkworm and survival rate, which is applied in the direction of animal husbandry and the like, can solve the problem that the wintering survival rate of water silkworm is less than 80%, and achieves the effects of improving the wintering survival rate, low cost and convenient operation.

Inactive Publication Date: 2017-05-10
SHANGHAI ACAD OF AGRI SCI
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AI Technical Summary

Problems solved by technology

In the middle and lower reaches of the Yangtze River, water worms begin to overwinter in December every year until the end of February of the following year. The safe and smooth wintering of water worms is very important for the high yield of the next year. However, due to the inconsistent winter temperature conditions in various places, no improvement has been seen so far. An effective method for the overwintering survival rate of waterworms, resulting in the survival rate of waterworms in production is often less than 80%

Method used

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Experimental program
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Embodiment 1

[0014] Implementation location: Changshu City, Jiangsu Province

[0015] 1) Sprinkle pig manure: At the beginning of December, the water in the breeding pond was drained, and fresh pig manure (from the ecological pig farm of Zhongjing Village, Yushan Town, Changshu City) that had been separated from dryness and wetness was selected as feed. Dilute the manure with water (pig manure: water = 1:2, weight ratio) and evenly sprinkle it on the surface of the Limnodrilus hoffmeisteri breeding pond. The amount of pig manure is 400kg / 667m 2 ;

[0016] 2) Regular filling of river water: when there are 1-2 cm cracks in the surface soil of the breeding pond, add non-polluting river water, and then refill every 7-10 days after the 1-2 cm cracks appear in the surface soil of the breeding pond Clean river water without pollution, keep the water level at 2-5 cm, the river water meets the national fishery water quality standard (GB11607), and the water flow rate is every 667m 2 The breeding ...

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Abstract

The invention discloses a method for improving the overwintering survival rate of limnodrilus hoffmeisteri. The method includes the following steps: at the beginning of December, draining a limnodrilus hoffmeisteri breeding pond completely, pouring a layer of pig manure on the breeding pond, and according to the dry condition of the surface soil of the breeding pond, injecting pollution-free river water every 7-10 days. The nutrition requirement, water quality requirement and wetting-and-drying alternation condition of the limnodrilus hoffmeisteri in the overwintering period is considered, and the method has the advantages of being convenient to operate, low in labor intensity and cost and the like.

Description

technical field [0001] The invention belongs to the technical field of aquatic animal breeding, and in particular relates to a method for improving the overwintering survival rate of water silk worms. Background technique [0002] Water earthworms (also known as silk earthworms, red nematodes, ditch worms, etc.) are the most common benthic animals in fresh water, belonging to the phylum Annelids, Oligochaeta, Periporooligochaeta, Tubificidae, and Water Worms. The genus (Limnodrilus) is an important part of the freshwater benthic fauna. Waterworm has high nutritional value, and it is the open bait that many aquatic animals like to eat during the seedling stage. It is also the main food for bottom-dwelling fish such as sturgeon, carp, crucian carp, loach, giant salamander and rice field eel, and can provide long-term and stable food for aquaculture aquatic products. High-quality animal feed reduces breeding costs, improves breeding efficiency and grows quality. Therefore, th...

Claims

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Application Information

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IPC IPC(8): A01K67/033
CPCA01K67/0332
Inventor 周文宗黄伟伟姚春霞
Owner SHANGHAI ACAD OF AGRI SCI
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