Background technology
Nutrition and the research of intestinal health relation are one of key content of traditional nutrition and the research of modern clinical nutriology always.For piglet; The growth of GI structure and immunologic function and imperfection; Weanling pig be faced with many factors stress, stress cause the disorder of weanling pig function of intestinal canal, particularly the change of the variation of enteron aisle morphosis, intestinal microflora and intestinal growth are obstructed; Thereby influence the intestinal health of weanling pig, cause the rising of production performance reduction, diarrhoea and the death rate.Therefore, in today of back antibiotic era development, how passing through the intestinal health of nutrition regulation weanling pig, guarantee the performance of its level of production and efficient, is a very interested research topic for the Animal nutrition scholar.
Starch is the main carbohydrate source of grain trough, also is the important source of livestock and poultry institute energy requirement.Starch mainly contains two kinds of existence forms: amylose and amylopectin.The nutritive value of starch mainly depends in size and the starch of starch granules the different and difference to some extent of the ratio of amylose and amylopectin.Deng (2010) report, amylose can cause that with the difference of amylopectin ratios starch digestion rate in alimentary canal is different in the starch, thereby causes the nutrition physiology effect in the animal body there are differences.Some starch is is digested and assimilated at the preceding intestinal segment of animal; Yet some non-digestible starches (as: resistant starch) can be resisted the hydrolysis of digestive ferment in small intestine; Rely on the enteric microorganism fermentation to produce SCFA (SCFA) and arrive the alimentary canal back segment; Simultaneously can obviously influence distribution, composition and the quantity of enteron aisle morphosis and enteric microorganism, and it is dangerous to reduce potential disease, helps animal intestinal health.There are some researches show that there are notable difference in its chemical composition of the starch of separate sources and physical arrangement, amylose is a kind of digestible starch at a slow speed, and amylose content is high more in the starch, starch enzyme degraded difficult to digest more.Research for starch at present mainly concentrates on resistant starch to people and other colon in mammals functions, enteric microorganism and lipometabolic influence.Yet, whether cause the influence of weanling pig intestinal health for different starch sources in the diet, do not appear in the newspapers at present, need further research owing to amylose in the starch and amylopectin ratios difference.
Summary of the invention
Based on above reason; The present invention as the influence of the different starch source combinations of Research of Animal Model for Study daily ration to weanling pig production performance and intestinal health, provides scientific basis for exploring through adjustment diet starch source regulation and control weanling pig intestinal health and holistic health with the 5-10Kg weanling pig.
Technical scheme of the present invention is following:
Can improve the healthy diet starch source combination of intestine of young pigs, the ratio of amylose and amylopectin is 0.48.
The ratio of amylose and amylopectin is 0.48 can improve the concentration and the mol ratio of the concentration, particularly butyric acid of piglet caecum and the total SCFA of colonic contents, thereby helps keeping the integrality and the function of piglet hindgut enterocyte.And the ratio of feed for a long time amylose and amylopectin is that 0.48 diet can improve the enteron aisle form and the enteron aisle enzyme is lived, and improves the intestinal villi height, increases the crypts degree of depth, thereby can promote growing of piglet small intestine, improves the enteron aisle morphosis.To be 0.48 starch source possibly more help the intestinal health of weanling pig as the dietary digestibility of energy source to the ratio of amylose and amylopectin, helps the performance of piglet later stage production performance.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
The objective of the invention is reasonably combined feed starch source and improve the piglet production performance, improve intestinal microflora, improve the absorption and the transhipment of enteral nutrition material, reduce ablactation stress and diarrhoea, improve intestine of young pigs health.
In order to achieve the above object, the present invention is an experimental animal with the weanling pig, the different starch source of feeding combination diets, and healthy protective effect waits and realizes the object of the invention to intestine of young pigs to verify the starch source combination.
The present invention adopts single factor experiment design, selects 28 of the wean DLY pigs that term is close, parity is similar, equivalent environment body weight 6.5-7kg is healthy, weans in 21 ages in days; Be divided into 4 processing after the wean at random; Each handles 7 repetitions, and each repeats 1 pig, carries out 21 days feeding experiment by a definite date.
4 kinds of different starch source are: the ratio of amylose and amylopectin is 0.12,0.48,0.21 and 0.24.
The result:
The different daily ration starch source of table 1 are to weanling pig (0~21d) production performance, enteron aisle form (height of naps, the crypts degree of depth and ratio) and the enzyme influence of power while still alive
Annotate: the alphabetical different table registration value difference of going together different significantly (P<0.05).
The different starch source of table 2 are to the influence of weanling pig small intestine different parts starch digestion rate
The different starch source of table 3 are to the influence of weanling pig caecum and colon volatile fat acid concentration (μ mol/g fresh matter)
The present invention finds, the ratio of amylose and amylopectin is 0.48 can improve the concentration and the mol ratio of the concentration, particularly butyric acid of piglet caecum and the total SCFA of colonic contents, thereby helps keeping the integrality and the function of piglet hindgut enterocyte.And the ratio of feed for a long time amylose and amylopectin is that 0.48 diet can improve the enteron aisle form and the enteron aisle enzyme is lived, and improves the intestinal villi height, increases the crypts degree of depth, thereby can promote growing of piglet small intestine, improves the enteron aisle morphosis.Therefore the ratio of amylose and amylopectin is that 0.48 starch source is originated as dietary digestibility of energy and possibly more helped the intestinal health of weanling pig, helps the performance of piglet later stage production performance.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.