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Freshwater rotifer organic detritus bait and preparation method thereof

An organic and detritus technology, applied in the field of freshwater aquaculture, can solve problems such as difficulty in meeting the nutritional needs of fish and shrimp larvae, difficulty in ensuring the supply of unicellular algae, affecting the normal growth of freshwater rotifers, etc. Feeding cost, effect of promoting fish growth

Inactive Publication Date: 2016-04-20
武汉中博水产生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, single-celled algae or yeast are mostly used for large-scale cultivation of rotifers. Since freshwater rotifers have a large demand for single-celled algae, and it is difficult to ensure a sufficient supply of single-celled algae, single-celled algae are used to cultivate Rotifers are more difficult
The nutritional components of rotifers cultured with yeast are single, and it is difficult to meet the nutritional needs of fish and shrimp larvae, and the NH in the water body where yeast is used as bait 3 The concentration is unstable, which can easily affect the normal growth of freshwater rotifers

Method used

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  • Freshwater rotifer organic detritus bait and preparation method thereof
  • Freshwater rotifer organic detritus bait and preparation method thereof
  • Freshwater rotifer organic detritus bait and preparation method thereof

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preparation example Construction

[0031] The embodiment of the present invention provides a method for preparing freshwater rotifer organic debris bait, comprising the following steps:

[0032] S1. According to mass percentage, mix 60-80% (optimally 70%) of fresh chicken manure, 20-40% (optimally 30%) of auxiliary materials and 1-2‰ (optimally 1.5‰) of the first A fermentation agent is mixed evenly to obtain a first mixture, and water is added to the first mixture until the water content is 50% to 60% (optimally 55%), and then fermented. Fermentation is carried out under the condition of ambient temperature>15°C. The fermentation temperature is detected in real time, and after the fermentation temperature rises to ≥70°C, the first mixture added with water is stirred, and the fermentation temperature is controlled at 70-75°C, and the fermentation is continued for 5-10 days to obtain the first fermentation product.

[0033] In this embodiment, the auxiliary materials are agricultural wastes with crude fiber con...

Embodiment 1

[0043]Example 1, using organic debris bait with different fermented rapeseed meal content to feed rotifers

[0044] The organic debris bait prepared by the method in this example is used to feed Brachionus calyxae, as shown in Table 1. According to the percentage by mass, fermented chicken manure is mainly used, and the added content is 0%, 10%, and 20% respectively. , 30%, 40%, 50%, 100% fermented rapeseed meal, and raised 7 groups of rotifers, the initial density of each group of rotifers was 15ind / ml, and the feeding amount of each group of rotifers was 80mg / L·d, Feed continuously for 6 days, and measure the number of rotifers every day.

[0045] Referring to Table 1, it can be seen that when the content of fermented rapeseed meal is 20%, the number of rotifers is the largest, that is, the cultivation amount of rotifers is the largest. It can be seen that, by mass percentage, the ratio of organic debris bait is: fermented chicken manure 80% , 20% of fermented rapeseed meal...

Embodiment 2

[0050] Embodiment 2, respectively using Scenedesmus obliques and the organic debris bait of the present invention to raise rotifers

[0051] In the present embodiment, the density of Scenedesmus obliquus is 4×10 6 cells / ml, the mass of organic debris bait is equivalent to 4×10 6 cells / ml dry weight of Scenedesmus obliquus (80mg / L).

[0052] The experiment was divided into two groups: organic detritus group and Scenedesmus obliquus group, with 3 parallels in each group. The number of rotifers in all beakers was determined daily and the experiment was continued until the rotifer population stopped increasing. After the experiment, the nutritional components such as protein and fat of each group of rotifers were determined.

[0053] The total nitrogen content of the bait and rotifers was measured with a Kjeldahl nitrogen analyzer of the model KND-660D, and the measurement result was N × 6.25, which was the crude protein content. Determination of crude fat percentage content o...

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Abstract

The invention discloses freshwater rotifer organic detritus bait and a preparation method thereof, and relates to the field of freshwater aquaculture. The preparation method comprises the following steps: uniformly mixing 60 to 80 percent of chicken manure, 20 to 40 percent of auxiliary materials and 0.1 to 0.2 percent of first fermentation bacteria agent, adding water until the water content is 50 to 60 percent, and fermenting at the ambient temperature of higher than 15 DEG C; after the fermenting temperature is higher than or equal to 70 DEG C, controlling the fermenting temperature to be between 70 and 75 DEG C and continuously fermenting for 5 to 10 days to obtain a first fermenting product; adding 0.2 to 0.3 percent of second fermentation bacteria agent into rapeseed meal, mixing uniformly, and adding water until the water content is 20 to 25 percent; after fermenting for 5 to 10 days at the fermenting temperature of 35 to 55 DEG C to obtain a second fermenting product; drying, crushing and mixing the first fermenting product and the second fermenting product to obtain the organic detritus bait. The freshwater rotifer organic detritus bait is low in cost and rich in nutrients and the feeding difficulty can be reduced.

Description

technical field [0001] The invention relates to the field of freshwater aquaculture, in particular to a freshwater rotifer organic detritus bait and a preparation method thereof. Background technique [0002] Freshwater rotifers are high-quality opening bait for freshwater fish larvae, shrimps and crabs, etc., and also excellent bait for adult fish that feed on zooplankton, such as bighead carp and carp. [0003] Brachionus rugosa in seawater has been widely used as open bait for larvae in mariculture, and has been cultivated on a large scale; while the cultivation of freshwater rotifers mainly relies on traditional cultivation methods, which are easy to cause problems in actual production. The hair pond rate is unstable. [0004] Freshwater rotifers have a wide range of feeding habits. In natural water bodies, they mainly feed on small substances in water, such as single-celled algae, bacteria, and even organic debris such as soybean milk, fermented chicken manure slurry, ...

Claims

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Application Information

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IPC IPC(8): A23K50/80A23K10/12
CPCY02A40/818
Inventor 邓平艾桃山张生元喻运珍张立强周伟东余姣龙高祥林余少梅李勤
Owner 武汉中博水产生物技术有限公司