Extratos vegetais para porcas e leitões na creche

Abstract

The objective of the present document was carried an experiment and a metaanalysis, involving the use of vegetal extract for sows in gestation, lactation and piglets at nursery phase. The study with sows was carried with thirty genetically homogeneous sows were distributed in two treatments: one control diet (CD) and a CD plus 160ppm of saponins. The experimental design was a completely randomized block. The studied variables in sows were feed supply, fecal characteristics (color and consistency) and corporal score. In the piglets the studied variables were mummified fetuses, stillborn, born alive and total born, birth and weaning weights. Were not found differences in color for sows feces. The fecal consistency for sows that received diets with saponins was more solid. In the end nursing the sows fed with saponins presented a corporal score higher compared to the control females. The piglets of sows that received diets with saponins presented higher weights on birth (1.2 x 1.4kg) and at weaning (5.5 x 5.9kg) weights, both at P<0.05. Sows fed in the last 15 days of gestation and during the nursing period with diets containing 160ppm of saponins, had better corporal score in the end of nursing and their piglets had higher birth and weaning weights. In meta-analyses study were utilized eleven publications containing 48 treatments and 2752 piglets. The treatments were separated in two groups: synthesis antimicrobial (AS) and vegetal extracts (EV). Were analyzed the experimental variables and piglet s performance. For experimental variables no differences (P>0.05) were found. The average piglets number for each treatment was 57, the average experimental period was 35 days and average initial age was 25 days. The average initial weight (7.4kg) was 16% greater (P<0.05) for piglets that received vegetal extracts. The average final weight was 25kg. The average nutritional values (P<0.05) were: 3345 kcal of EM/kg, 0.39% of methionine, 1.42% of 9 lysine and 21.8% of crude protein. Were no differences (P>0.05) among piglet groups for average feed intake (818g/d), average daily gain (480g/d) and gain ratio (1.70) (P>0.05) Post weaning piglets feeding with diets containing vegetal extracts and synthesis antimicrobials don t change: feed intake, daily gain, gain ratio, ingestion of metabolizable energy, crude protein, lysine, methionine, calcium and phosphorus. The live weight is not the best predictor to estimate performance variables for post weaning piglets feed with diets containing vegetal extracts and synthesis antimicrobials, being the meta-analysis better to analyses these variables.