CN103583468B - Method for rapidly evaluating corn DDGS fowl metabolic energy through physicochemical indexes - Google Patents
Method for rapidly evaluating corn DDGS fowl metabolic energy through physicochemical indexes Download PDFInfo
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Abstract
The invention discloses a method for rapidly evaluating corn DDGS fowl metabolic energy through the physicochemical indexes. The method includes the steps of carrying out tests to determine CFs, EE, GE and actual measurement metabolic energy values of a plurality of corn DDGS samples, carrying out regression analysis on the determined data, and building an optimal regression model for rapidly evaluating the fowl metabolic energy. According to the method, the corn DDGS fowl metabolic energy can be accurately predicted through the built mathematic model, the model can be updated in real time along with the newly increased DDGS samples, and therefore the fowl feed matching accuracy can be better guaranteed.
Description
Technical field
The present invention relates to a kind of method by its poultry metabolic energy of corn DDGS physical and chemical index rapid evaluation, belong to field of feed.
Background technology
In recent years, international energy outstanding problem, crude oil price constantly rises, and finds and utilizes renewable resources just to become the inevitable choice solving world oil crisis problem.Therefore the research and development of alcohol fuel launch rapidly in developed countries such as America and Europes and have obtained good effect.Meanwhile, aquaculture runs into an another world difficult problem-protein resource shortage, probes into unconventional protein feeds raw material extremely urgent.Corn DDGS is that corn produces the accessory substance of ethanol through fermentation, and have high protein, high effective phosphorus, low phytic acid phosphorus, homovitamin and the feature without antinutritional factor, the protein feeds raw material as a kind of high-quality is widely used in feed industry.The metabolic energy of corn DDGS has larger range of variation because of the difference of corn grade, planting area, processing technology etc., according to fixed numbers component design in database in production practices, often cause joined fodder energy too high or not enough, affect the nutritive value of feed.
The patent of invention that existing notification number is " CN 102742745 B ", denomination of invention is " a kind of method by physical and chemical index rapid evaluation corn poultry metabolic energy ", it is by measuring corn neutral detergent fiber value (NDF), Maize Test Weight (VW
1) and the rear unit weight (VW of corn kernel pulverizing
2) calculate corn metabolic energy AEM value.Its test subject is corn, and predicted value differs larger with measured value.
Therefore, in view of the defect that the computational methods of above-mentioned existing corn poultry metabolic energy exist, the present inventor's actively in addition research and innovation, to developing a kind of method of quick, easy, the accurate evaluation corn DDGS poultry metabolic energy that can apply aborning newly, precisely cultivating be significant with feedstuff efficiency utilization for realizing animal.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of method by physical and chemical index rapid evaluation corn DDGS poultry metabolic energy; The present invention is intended to evaluate corn DDGS poultry metabolic energy by measuring simple physical and chemical index, improves the accuracy of feed formulation.
The present invention is achieved in that by measuring raw fiber (CF) in some corn DDGS samples, crude fat (EE), total energy (GE) and actual measurement metabolizable energy value, data are carried out regression analysis, and the mathematical model building its poultry metabolic energy of rapid evaluation is as follows:
AME(MJ/Kg)＝-0.5621CF+0.2420EE+0.8014GE-4.2342(R
2＝0.896)
A kind of method by physical and chemical index rapid evaluation corn DDGS poultry metabolic energy: measure corn DDGS crude fiber content according to GB/T6432, its crude fat content is measured by GB/T6433, utilize energy instrument to measure total energy value, will mathematical model AME (MJ/Kg)=-0.5621CF+0.2420EE+0.8014GE-4.2342 (R of CF value, EE value, GE value substitution structure be recorded
2=0.896), corn DDGS metabolizable energy value (AME).
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme, result of use of the present invention is: as a kind of method of rapid evaluation corn DDGS poultry metabolic energy, be applicable to the rapid evaluation of corn DDGS poultry metabolic energy in production practices, the accuracy of feed formula preparation can be improved, provide safeguard for animal precisely cultivates.
Mensuration main body of the present invention is corn DDGS, the accessory substance namely after corn fermentation.The optimum regression model predicting corn DDGS poultry Apparent metabolizable energy is determined by principal component analysis, stepwise regression analysis and path analysis, predicted value and measured value differ little than existing patent (CN 102742745 B), and the determination coefficient of equation is higher.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification, and in order to above and other object of the present invention, feature and advantage can be become apparent, describe in detail especially exemplified by preferred embodiment below.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, come, to a kind of its embodiment of method by physical and chemical index rapid evaluation corn DDGS poultry metabolic energy proposed according to the present invention, step, feature and effect thereof, to be described in detail as follows with preferred embodiment below.
Embodiment 1
1, five kinds of corn DDGS samples are gathered, measure wherein raw fiber (CF), crude fat (EE), total energy (GE) respectively, measured result is substituted in model AME (MJ/Kg)=-0.5621CF+0.2420EE+0.8014GE-4.2342, the predicted value (see table 1) of corn DDGS metabolic energy can be obtained.
For evaluating the degree of agreement of predicted value and corn DDGS metabolic energy actual value, measure the metabolizable energy value of five kinds of corn DDGSs by the following method: select the blue brown shell egg stock cock in the sea in more than 18 week age of 2.5 (± 0.2) Kg, be placed in the indoor single cage list of ring control metabolic determination only to raise, indoor temperature 18 DEG C ~ 27 DEG C, humidity 40% ~ 60%, intensity of illumination 10lx ~ 20lx, natural lighting or artificial lighting; Light application time is 16h/d.The non-test phase feeds laying hen full price ration formulation, and freely drink water, Control experiment chicken body weight is in prescribed limit.Employing random experiment designs, and test chicken is divided into 5 groups at random, often organizes 12 repetitions, each repetition 1 chicken.Chicken adapts to fasting after 7 days, freely drinks water, continuous emptying 48h, raises by force the DDGS sample that 30g pulverizes afterwards, collects 48h excreta continuously.Analytical unit quality corn DDGS sample and corresponding excremental energy value respectively, the difference of the two is the measured value of corn DDGS metabolic energy.
2. result of the test
Result of the test shows, corn DDGS metabolic energy predicted value and measured value difference less, predict the outcome accurately (table 1) of forecast model.
Table 1 corn DDGS sample metabolic energy measured value and predicted value contrast (MJ/Kg)
Embodiment 2
1, three kinds of corn DDGS samples are gathered, measure wherein raw fiber (CF), crude fat (EE), total energy (GE) respectively, measured result is substituted in model AME (MJ/Kg)=-0.5621CF+0.2420EE+0.8014GE-4.2342, the predicted value of corn DDGS metabolic energy can be obtained.(see table 2).
Table 2 corn DDGS sample metabolic energy measured value and predicted value contrast (MJ/Kg)
For evaluating the degree of agreement of predicted value and corn DDGS metabolic energy actual value, measure the metabolizable energy value of five kinds of corn DDGSs by the following method: select the healthy AA Broiler chicks that 28 age in days body weight are close, layer cage is raised, in house, temperature controls to perform in strict accordance with " love pulls out commercial broiler flocks feeding and management handbook increasingly ", examination chicken free choice feeding and drinking-water, 24h illumination.Examination chicken is divided at random 1 basic ration group and 3 separate sources corn DDGS alternate sets, basic ration composition and trophic level are in table 3, alternate sets is fed 20% corn DDGS+80% basic ration, all daily rations all make external source indicator in the ratio interpolation TiO2 of 0.4%, fully cold rolling granulation after mixing.Every experimental group arranges 8 repetitions, each repetition 8 chickens.Metabolic test is in 28 ages in days, and 28-30 age in days, for raise the phase in advance, makes examination chicken adequacy test environment and daily ration, after the 12h that goes on a hunger strike, enters and just try the phase, collects the whole excreta of 32-35 age in days in units of repeating.The measured value of corn DDGS Apparent metabolizable energy is obtained by following formula.
Formula: feedstuff metabolisable energy (AME)=feed total energy × feed total energy metabolic rate
Corn DDGS metabolizable energy value (MJ/Kg)=A-100 × (A-B)/K;
Daily ration Apparent metabolizable energy value based on A;
B is mixed ration Apparent metabolizable energy value;
K is the percentage that corn DDGS substitutes basic ration.
Table 3 28-35 daily ration basic ration composition and trophic level (air bells dry basis)
2. result of the test
Result of the test shows, corn DDGS metabolic energy predicted value and measured value difference less, predict the outcome accurately (table 2) of forecast model.
In sum, Domestic Scientific Research institutes and enterprise laboratory all can measure CF, EE, GE accurately, the present invention only need measure raw fiber (CF), crude fat (EE) and total energy (GE) and can predict fast corn DDGS poultry Apparent metabolizable energy, avoid Animal experiment, reduce costs, the shortening cycle, significant to the fast detecting of critical in poultry feed formulation, feed.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (1)
1. the method by physical and chemical index rapid evaluation corn DDGS poultry metabolic energy, it is characterized in that it is realized by following steps: measure crude fiber content in corn DDGS according to standard GB/T/T6432, crude fat content in corn DDGS is measured by standard GB/T/T6433, energy instrument is utilized to measure total energy value, by crude fiber content CF value in the corn DDGS that records, crude fat content EE value, total energy GE value substitutes into the mathematical model built, metabolizable energy value AME (MJ/Kg)=-0.5621CF+0.2420EE+0.8014GE-4.2342, its determination coefficient R2=0.896, corn DDGS metabolizable energy value AME can be drawn.
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| CN104792927A (en) * | 2015-04-13 | 2015-07-22 | 广东温氏食品集团股份有限公司 | Method for evaluating effective energy value of yellow-feathered broilers fast by utilizing chemical constituents of soybean meal |
| CN111763710B (en) * | 2020-07-20 | 2021-08-06 | 华南农业大学 | Method for evaluating goose feed metabolism energy by using enzymatic hydrolysis energy method |
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