The Effects Of Different Processing Methods And Kinds Of Diet On The Performance Of Early-weaned Piglets After Weaning

In order to prevent the growth retardation and diarrhea of early-weaned piglets afterweaned, two trails were conducted to investigate the effects of different processing methodsand kinds of diet on the performance, diarrhea indexes, digestibility of nutrients of early-weanedpiglets after weaning. Additionally, an investigation was conducted to find that whether thephysical and chemical properties of the diet are changed by different processing methods andkinds of diet.Trial one was conducted to study the effects of different processing methods and kinds ofdiet on the performance, diarrhea indexes, digestibility of nutrients of piglets after weaning.DLY piglets(n=60,21±1d) were divided into 6 treatment in a 2×3 factorial arrangement, andthere were five replicates with two piglets per replicate in one treatment. Two kinds of dietwhich at the same nutritional level were one based on high content of animal material (HAD)and the other one based on low content of animal material (LAD), and three processingmethods of diets were fermentation, cooked and water-mixed. The results showed that thedifferent processing methods of diet had great effects on the average daily food intake (ADFI).The average daily gain (ADG) of the cooked treatment was significantly higher than that ofother treatments (P＜0.05). But the fermentation depressed the feed/gain (F/G) 12.82%comparing with the water-mixed treatment. Also, HAD was better than LAD in ADG, ADFI,F/G and diarrhea indexes. Fermented LAD improved more than HAD in performance yet. Thedifferent processing methods and kinds of diet had no effects on the crude protein% (CP%)and digestibility of dry matter(DM), CP, Organic matter (OM) and energy (p＞0.05).But thedifferent processing methods and kinds of diet varieties all had terribly significant effects onthe pH of diets and feces (p＜0.01),by the way, the processing methods and kinds of diet hadterribly significant effects on their relationship (p＜0.01).The pH of fermented diets declinedto subter-5, and the number of Lactobacillus superiority to E.coli which was 0 in diet. It wasconcluded that the effects of different processing methods and kinds of diets had on the performance of early-weaned piglets may be correlated with their influence on the pH andmicroorganism.In Trial two, to study the effects of different processing methods and kinds of diet on theperformance and diarrhea indexes on early-weaned piglets and the physical and chemicalproperties,144 DLY piglets weaned at 28±2d old were chosen and divided into 6 treatmentswhich designed the same as Trial one. There were four replicates with six piglets per replicatein one treatment. The result showed that the fermented treatment had significant effects on theelevation of ADG and the degression of F/G. The piglet fed HAD were raised ADGsignificant (p＜0.05) and ADFI extremely significant (p=0.01), and were cut down diarrheaindexes significant (p＜0.05) compared with the piglet fed LAD. The effects of differentprocessing methods and kinds of diets on the physical and chemical properties were allextremely significant (p＜0.01), especially on pH and Starch gelatinized degree (p＜0.01).Thefermented diet get more lower pH, UA and PS than the water-mixed diet, and the cooked diethad higher Starch gelatinized degree and pH, at the same time it get more lower UA and PSthan the water-mixed diet.Based on this study, it was concluded that the different processing methods and kinds ofdiets had different effects on the performance, digestibility of nutrients of early-weanedpiglets after weaning. In this study, the ferment diet was propitious to increase theperformance, especially of ADG and F/G. different methods of cooked diet had differenteffects on the performance of piglets after weaning, which lied on cooking degree and impact.HAD had better effects on performance of early-weaned piglets after weaning than LAD, butthe performance of piglets which fed LAD improved more comparatively.