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Feed additive for inhibiting neoteny of young crab

A feed additive and additive technology, which is applied in the field of feed additives in aquaculture industry, can solve the problems of the loss of river crab breeding and the unsatisfactory effect of measures to inhibit the precocious puberty of juvenile crabs, so as to reduce the breeding cost, improve the feeding effect, and inhibit the precocious puberty of juvenile crabs. Effect

Inactive Publication Date: 2008-08-13
NANJING SHUAIFENG FEED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is: the precocious juvenile crabs appearing in the culture of river crabs cause great losses to the culture of river crabs, and the existing measures for inhibiting the precocious puberty of juvenile crabs are not ideal enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] VC phosphate 3kg; taurine 3kg; sodium humate 4kg; cholesterol 3kg; crab premix 22kg; secondary powder 15kg. Put 3kg of secondary powder into the mixer first, then add the above-mentioned feed additive ingredients except the secondary powder one by one according to the dosage from large to small, and finally put in the remaining secondary powder, start the mixer, mix for 15min, and the mixing uniformity CV≤5% To prepare a feed additive for inhibiting precocious puberty of juvenile crabs, and the error of component measurement accuracy during preparation is less than ±0.5%.

Embodiment 2

[0014] VC phosphate 2kg; taurine 2kg; sodium humate 3kg; cholesterol 2kg; crab premix 18kg; secondary powder 5kg. First put 2kg of secondary powder into the mixer, and then add the above-mentioned feed additive ingredients except the secondary powder one by one according to the dosage from large to small, and finally put in the remaining secondary powder, start the mixer, mix for 15 minutes, and the mixing uniformity CV≤5 %, the feed additive for inhibiting the precocious puberty of juvenile crabs is prepared, and the error of component measurement accuracy is less than ±0.5% during preparation.

Embodiment 3

[0016] VC phosphate 2kg; taurine 2kg; sodium humate 3kg; cholesterol 2kg; crab premix 20kg; secondary powder 11kg; total 40kg. Put 7kg of secondary powder into the mixer first, then add the above-mentioned feed additive ingredients except the secondary powder one by one according to the dosage, and finally put in the rest of the secondary powder, start the mixer, mix for 15min, and the mixing uniformity CV≤5% To prepare a feed additive for inhibiting precocious puberty of juvenile crabs, and the error of component measurement accuracy during preparation is less than ±0.5%.

[0017] In the cultivation of juvenile crabs, the additive of the present invention is mixed with compound bait to prepare the feed for juvenile crabs. The mixing method is a known method and will not be described in detail. Different growth stages have different baits, mainly because the proportion of animal and plant baits has changed. Generally, in the feed to be put in, there are 1-2 parts of the addit...

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Abstract

The invention provides an additive for suppressing juvenile crab early maturity, including: VC phosphate, taurine, humic acid sodium, cholesterol, premix for crab, wheat-middlings, the components are as follows: 2-3 parts by weight of VC phosphate; 2-3 parts by weight of taurine; 3-4 parts by weight of humic acid sodium; 2-3 parts by weight of cholesterol; 18-22 parts by weight of premix for crab; 5-15 parts by weight of wheat-middlings. The invention optimizes feeding of suppressing juvenile crab from the point of improving the juvenile crab physiology, and is a feed additive containing juvenile crab early maturity suppressing factor, and has the functions of improving growth and suppressing juvenile crab early maturity, the good effects are as follows: 1) juvenile crab early maturity rate is reduced significantly, from the 18-25% before treatment to 5-8% after treatment; 2) the survival rate of the juvenile crab is improved from 12% to 15-20%; 3) the feed usage amount is reduced, the feed coefficient is reduced from 3.2 before adding to 2.4-2.6 after adding, the cultivation cost is reduced; 4) because the juvenile crab early maturity rate is reduced, the elimination rate is reduced, the average output of juvenile crab per mu is increased from 90-100kg to 125-140kg.

Description

technical field [0001] The invention belongs to the technical field of feed additives for aquaculture, and relates to a feed additive for crabs, in particular to a feed additive for inhibiting premature puberty of juvenile crabs. Background technique [0002] Pond cultivation of river crabs will take two years to develop. In the first year, the crab seedlings will be developed into young crabs, i.e. crab species, and in the second year, the young crabs will be developed into crabs, i.e. commercial crabs are listed. During the cultivation of juvenile crabs, a considerable proportion of sexually precocious individuals will appear, resulting in large differences in the size of juvenile crabs. Precocious juvenile crabs will also die in large numbers during the breeding process of adult crabs in the next year. Therefore, precocious juvenile crabs must not be used as The use of crab species is ruthlessly eliminated, causing significant economic losses and waste of resources. Unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K1/16A23K1/18A23K20/137A23K20/142A23K20/168A23K20/174A23K50/80
CPCY02A40/818
Inventor 孙建国张德华刘家驹
Owner NANJING SHUAIFENG FEED
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