Summary of the invention
The objective of the invention is to overcome the deficiency of the existing application technology of hexadienoic acid, a kind of new application of hexadienoic acid is provided, widen the range of application of hexadienoic acid.The present invention has excavated its multiple effect in the health pig body, and hexadienoic acid is added in the pig feed, can improve growth performance and the meat quality of pig.
Another object of the present invention provides a kind of new pig feed.
A further object of the invention provides the preparation method of described new pig feed.
Above-mentioned purpose of the present invention is achieved by the following technical programs:
The present invention sums up by a large amount of research experiments and obtains the application of hexadienoic acid in the preparation pig feed additive, is used to prepare pig feed additive.Described pig feed additive can be brought into play multiple effect in the health pig body, effectively improve the growth performance of pig and improve the meat matter of pig.
The present invention is by animal feeding test, slaughter experiment and cell culture test, and research is summed up and obtained the new application of hexadienoic acid as feed addictive.In the basal diet of pig, add hexadienoic acid, can significantly improve growth performance and the meat matter of pig, as the average daily gain and the average daily ingestion amount that improve pig, increase the marble grain scoring, improve yellowish pink and be waterpower, improve the level of circulation IGF-I etc.; On the other hand, by to the isolated liver cell culture experiment,, the secretion that obtains hexadienoic acid and can promote IGF-I, the effect of raising IGF-I, IGF-II and IGF-IR expression of gene aspect are summed up in research.Result of study of the present invention shows that hexadienoic acid influences growth performance and the meat matter of pig by the IGF-I approach.
The invention provides a kind of new pig feed, comprise hexadienoic acid and conventional feedstuff.
Preferably, the amount that contains hexadienoic acid in the new pig feed of the present invention is: 0.5-4kg/ ton feed, preferred 4kg hexadienoic acid/ton feed.Hexadienoic acid is the white powder material, and use amount is less, should use the packaged preservation of sealing bag after using.
The present invention provides the preparation method of described pig feed simultaneously, may further comprise the steps:
(1) weighing hexadienoic acid;
(2) hexadienoic acid is mixed with feed premix raw material obtain premix; Or be mixed and made into pre-mixing agent with carrier;
(3) step (2) is mixed premix or the pre-mixing agent obtain and is mixed with the complete feed raw material, makes complete feed.
The described hexadienoic acid of step (2) mixes with feed premix raw material can adopt conventional small-sized mixing apparatus, and described feed premix raw material is with reference to routine, but preferred vitamin or mineral substance premix;
The described carrier of step (3) is wheat bran or corn flour or stone flour etc.; Premix or pre-mixing agent mix with the complete feed raw material can adopt conventional large-scale mixing disintegrating apparatus, and described complete feed raw material comprises corn, dregs of beans, fish meal or other assorted dregs of rice type daily ration etc. with reference to routine.
Compared with prior art, the present invention has following beneficial effect:
(1) the invention provides a kind of important new application of hexadienoic acid.Hexadienoic acid was used and livestock and poultry cultivation production mainly as anticorrisive agent and acidulant in the past, but the present invention provides release that hexadienoic acid can also promote porcine hepatocyte IGF-I first, improve average daily gain, reduce the feed consumption weightening finish than, improve the effect of meat quality, significant to the development swine rearing.
(2) the invention provides a kind of new pig feed, the pig feed that has added hexadienoic acid is a kind of safe feed, and it does not contain swinery growth and the healthy poisonous and hazardous material of swinery.Generally, the oxidative metabolism approach of hexadienoic acid in animal body is identical with other aliphatic acid, can enter cell mitochondrial and carry out beta-oxidation, for body provides energy, can not produce adverse effect to people and surrounding environment, compare with general feed addictive, it also can play the effect that improves meat matter when improving the swinery growth performance.
(3) pig feed of interpolation hexadienoic acid of the present invention can be accelerated the speed of growth of pig, improves the feed palatability, improves local flavor, mouthfeel and the quality etc. of pork, thus the speed that quickening is delivered for sale, and the class of raising meat product makes it have higher market value.After hexadienoic acid in the feed enters in the pig body, raise the expression of IGF-I, promote the raising of the synthetic and growth performance of body protein, on the other hand, what improve pork product is waterpower, tender degree and acidity, thereby cause the mouthfeel of pork and local flavor to be greatly improved, finally reach the purpose of improving meat matter, make pork product on market, have certain advantage.
(4) hexadienoic acid addition of the present invention is less, can directly add in the premix, and the interpolation process is convenient and swift, and the preparation method is simple, does not have especial equipment requirements, has good popularization and application prospect.
The specific embodiment
Further describe the present invention below in conjunction with the drawings and specific embodiments.Employed test method and equipment are conventional method if no special instructions among the following embodiment; Employed raw material if no special instructions, is the raw material that can obtain from commercial channels.
Embodiment 1
(1) weighing hexadienoic acid (present embodiment adopts the hexadienoic acid of C6 medium chain conjugation, also can adopt commercial other to be used to produce the hexadienoic acid of additive);
(2) according to the amount of 0.5~4kg hexadienoic acid/ton feed hexadienoic acid is mixed with feed premix raw material and obtain premix; Or be mixed and made into pre-mixing agent with carrier; Described hexadienoic acid mixes with feed premix raw material can adopt conventional small-sized mixing apparatus, and the selection of described feed premix raw material and carrier and consumption be with reference to routine, selected vitamin or mineral substance premix; Described carrier is wheat bran, corn flour or stone flour etc.;
(3) step (2) is mixed the premix or the pre-mixing agent that obtain and mix, make complete feed with the complete feed raw material.Premix or pre-mixing agent mix with the complete feed raw material can adopt conventional large-scale mixing disintegrating apparatus, and described complete feed raw material is with reference to routine, the corn of optional pulverizing, dregs of beans, fish meal or other assorted dregs of rice type daily ration.
Hexadienoic acid is the white powder material, and use amount is less, should use the packaged preservation of sealing bag after using.Weigh with scale before hexadienoic acid uses, add according to a certain percentage, at first mix with premix after weighing is intact, or direct and carrier is mixed and made into pre-mixing agent with small-sized mixing apparatus.Just enter after premix is made in the large-scale mixing disintegrating apparatus and mix, make complete feed with the primary raw material of complete diet pellets such as the corn of pulverizing, dregs of beans.
Embodiment 2 hexadienoic acids are to the influence of piglet growth performance
In order to study the effect of hexadienoic acid, carried out feeding experiment Guangzhou power intelligence agricultural Co., Ltd pig farm and 2008 twice in the Hubei EmilZatopek boar Co., Ltd sound field of raising pigs respectively at 2006 as feed addictive.Testing for the first time swinery is ternary assorted (Du grows up), and initial average weight is 6.8 kilograms, and it is raised stage definitions is weanling pig; For the second time testing swinery is purebred big York, and initial average weight is 30 kilograms, and it is raised stage definitions for fattening early stage.
The test phase of raising is in advance adjusted swinery, and ratio approaching according to body weight, male and female half and half is divided into 4 groups at random, every group of 3 repetitions, and each repeats 20.Control group, the basal diet of feeding; Test group is added 4kg hexadienoic acid/ton feed in basal diet.The record swinery search for food and the serum biochemistry index of swinery is measured in weightening finish situation and blood sampling.Swinery search for food and the weightening finish situation the results are shown in following table 1~2.
Table 1 hexadienoic acid is to the weanling pig (influence of 6~16kg) growth performances
Table 2 hexadienoic acid is to the growing and fattening pigs (influence of 30~50kg) growth performances in early stage
Annotate: data are represented with Mean ± SE.The data shoulder is marked between same column does not have letter or identical lowercase alphabet differential different not remarkable (P>0.05) is arranged, and no same letter is represented significant difference (P<0.05), down together.
1, to the influence of average daily gain
For the first time test the average daily gain test group and all be significantly higher than control group (P<0.05); The average daily gain of testing for the second time test group is higher than control group, and difference is remarkable (P>0.05) not.The result shows that hexadienoic acid significantly improves weanling pig average daily gain 34g/d, improves growing and fattening pigs average daily gain in early stage 19g/d.
2, to the influence of average daily ingestion amount
The first time tests average daily ingestion amount test group and control group is more or less the same; For the second time test average daily ingestion amount test group and be higher than control group, difference is remarkable (P>0.05) not.The result shows that hexadienoic acid can improve the average daily ingestion amount 90g/d of fattening pig in early stage, but does not influence the average daily ingestion amount of weanling pig.
3, to the influence of feed conversion rate
Test for the first time the feed consumption weightening finish and all significantly be lower than control group (P<0.05), under the relevant little situation of feed intake, significantly improved the conversion ratio of feed than test group; Test for the second time the feed consumption weightening finish and be higher than control group than test group, difference is remarkable (P>0.05) not.The result shows, adds hexadiene in the feed for reducing the weaning pigs anharmonic ratio, and it is very resultful reducing feed cost.Though expect that anharmonic ratio has improved early stage, also improve average daily gain simultaneously, thereby promote the growth of pig in fattening.
Test shows, adds hexadienoic acid in the feed and can improve the growth performance of pig.
Embodiment 3 hexadienoic acids are to the influence of piglet blood biochemical indicator and hormonal readiness
Test swinery and test method are with embodiment 2.
In order to observe the influence of hexadienoic acid to the metabolism of serum fat, protein metabolism and the hormonal readiness of pig, choose the approaching pig individuality of body weight after the test for the first time, each repeats to select 2, carry out the vena cava anterior blood drawing, centrifugation serum, every serum index is measured, comprised triglycerides, T-CHOL, total protein, urea nitrogen, IGF-I and cortisol, the results are shown in Table 3.
Table 3 hexadienoic acid is to the influence of piglet blood biochemical indicator and hormonal readiness
Annotate: IGF-I refers to type-1 insulin like growth factor
1, to lipometabolic influence
As shown in Table 3, the serum triglyceride of test group significantly all is higher than control group (P<0.05); The T-CHOL of same test group also is higher than control group, and difference is remarkable (P>0.05) not.Presentation of results, daily ration adds the fat metabolism status that hexadienoic acid can influence piglet lipids contents and body.
2, to proteometabolic influence
The total serum protein of test group is significantly higher than control group (P<0.05), and the urea nitrogen of test group then is lower than control group, and difference is remarkable (P>0.05) not.The result shows that hexadienoic acid has produced certain influence to the metabolism of protein, and the descension theory of urea nitrogen understands that protein utilization rate improves, and this is consistent with the raising of growth performance.
3, to the influence of hormonal readiness
The IGF-I level of test group has improved 31% with respect to control group, and cortisol levels has then reduced.The result shows that hexadienoic acid has significant effects to the blood hormonal readiness, because IGF-I can promote the synthetic and growth performance of protein in body to improve, infers that hexadienoic acid has certain relation to the secretion of IGF-I.
Embodiment 4 hexadienoic acids are to the influence of former generation piglet liver cell IGF-I secretion
In order further to study the relation of hexadienoic acid and IGF-I, adopt three step of improvement original position perfusion method, separate piglet liver cell (porcine hepatocyte of this experimental example cultivation derives from the same swinery of the foregoing description), purifying is also cultivated, observe dosage and the time effect of hexadienoic acid to liver cell secretion IGF-I, and the influence of growth axis mRNA expression, experimental result is seen shown in accompanying drawing 1~accompanying drawing 9.
The time of accompanying drawing 1 former generation piglet liver cell IGF-I secretion for hexadienoic acid influences and dosage effect be figure as a result, and accompanying drawing 2~accompanying drawing 9 is respectively the influence of hexadienoic acid to IGFs gene expression.From accompanying drawing 1~accompanying drawing 9 as can be known, 100 μ M hexadienoic acids processing 6h, 24h and 48h all can significantly improve the secretion (P<0.05) of liver cell IGF-I; Simultaneously, hexadienoic acid can raise the expression of IGF-I, IGF-II and IGF-IR mRNA, in conjunction with protein I GFBP1-6 mRNA differential expression not significantly (P>0.05).The result shows that hexadienoic acid can promote the secretion of liver cell IGF-I and the expression of mRNA.By this research as can be known: hexadienoic acid all shows the facilitation to IGF-I on integral animal level, cellular level and molecular level.
Embodiment 4 hexadienoic acids are to the influence of fattening meat quality
Test swinery and test method are with embodiment 2.
Add the influence of hexadienoic acid in order further to observe feed to meat quality.When the second time, feeding experiment finished, select to be in 12 of pigs about average weight, each repeats one (each 6 of test group and control groups), carries out slaughter experiment in slaughterhouse, Wen Shi Ruichang, Heyuan City, Guangdong Province, measures its carcass trait and meat matter proterties.The results are shown in Table shown in 4.
Table 4 hexadienoic acid is to the influence of fattening meat quality
1, hexadienoic acid is to the influence of growing and fattening pigs carcass trait
As known from Table 4, test group and control group are relatively, carcass weight, body are directly long, body is tiltedly long and eye muscle area has improved 3.00%, 3.31%, 4.65% and 6.13% respectively, and the thickness of backfat that shoulder thickness, aft rib place and waist are recommended the junction has reduced by 18.3%, 18.3% and 20.2% respectively.The result shows that hexadienoic acid has improved the build and reduction its thickness of backfat (relevant with lean meat percentage) of pig, and this may increase relevant with the IGF-I secretion of test group.
2, hexadienoic acid is to fattening the improvement of meat quality
In several indexs of definition meat matter, the drip loss of test group meat sample, yellowish pink scoring and marble grain scoring all are better than control group, and the drip loss test group is than control group low 24.31%.All within normal yellowish pink scope, it is little to be correlated with for yellowish pink scoring test group and control group; With chromascope to yellowish pink L a the b value measure, the a value is represented yellowish pink scarlet degree, is also representing intramuscular pigment content, and a value is directly proportional with the scarlet degree of yellowish pink, the a value of test group is higher by 6.18% than control group, and this explanation test group meat sample color has scarlet trend.What the marble grain scoring was showed is the content of fat between intramuscular fat and flesh, the marbled degree of depth and intramuscular fat are proportionate, kind is careful more, the ratio of invisible intramuscular fat is big more in the high-grade more pork of meat, and is higher by 12.50% than control group through the marble grain scoring of qualification test group; The tender degree of test group is littler by 22.62% than control group, and tender degree is relevant with the texture and the hydrophilic power of meat, and texture is thinner, and the meat that hydrophilic power is stronger is tenderer.PH of experimental groups lacks 21.81% than control group decline in 24 hours, the muscle glycogen that pig kills in the muscle of back generates lactic acid, descends with the pH (acidity) of the accumulation muscle of lactic acid in the muscle by the glycolysis of anaerobic metabolism approach, the degree that pH descends to yellowish pink, be that waterpower, soluble protein concentration, shelf life length all have a significant effect.These data show that test group meat sample matter is better than control group.Comprehensive drip loss, yellowish pink, marble grain, tender degree and acidity etc. influence the index of meat merit, add hexadienoic acid in the feed meat tool is improved significantly.