Effect Of Detoxified Jatropha Curcas Kernel Meal On Growth Performance And Digestive Function Of Growing Pigs

The objective of the study was to investigate the effect of detoxified Jatropha curcas kernel meal (DJKM) added in growing pig diets on performance and organ development, and then search for an optimum inclusion level of replacing soybean meal (SBM) protein in the actual pig production. A total of 126 pigs, with average weight of (20.47±1.44) kg initially, were randomly allocated by weight to six dietary treatments with seven replications per treatment in a 79-d study. The levels of DJKM was 0%,2.5%.5%,7.5%,10%,12.5%, respectively. At the weight of 50 kg, four piglets in each group were chosen to metabolism test, at last, all the faecal samples, urinesamples as well as feed samples were store in refrigerator at -20℃ until they were further analyzed the apparent digestibility for nutrient. Performance of pigs was recorded, and four pigs in each group was slaughter On 79 d. The results showed:1) with the inceasing levels of DJKM, average feed intake and average daily gain was decreased and feed converse ratio was incerased (P<0.05). In particular, compare with pigs fed diets containing 0%,2.5%,5% NDJKM, the average feed intake and average daily gain was decreased, the feed converse ratio was increased in pigs fed diets containing 7.5%,10%,12.5%NDJKM (P<0.05).2) Dietary DJKM levels significantly alter energy digestibility (P<0.05), compared with control group, energy digestibility was lower in 2.5%,7.5%,10% and 12.5% group, with the inceasing levels of DJKM, nitrogen digestibility and nitrogen utilization efficiency was decreased (P<0.05). In particular, compare with pigs fed diets containing 0%,2.5%,5% NDJKM, nitrogen digestibility and nitrogen utilization efficiency was decreased in pigs fed diets containing 7.5%,10%, 12.5% NDJKM (P<0.05). The biological value of protein did not influnced by Dietary DJKM levels.3) Dietary DJKM levels significantly alter stomach or duodenum weight/body weight, the highest stomach weight/body weight was observed in in pigs fed fed diets containing 12.5% NDJKM.4) Compared with control group, the crypt depth of duodenum and jejunum in pigs fed fed diets containing 7.5%,10.0% and 12.5% NDJKM was significantly higher. The ratio of crypt depth/villus height of jejunum in pigs fed fed diets containing 7.5%,10.0% and 12.5% NDJKM was significantly higher than control group.5) With the inceasing levels of DJKM, we found a serious histological damage in gastrointestinal tract.Conclusion(1) When the addition level of NDJKM was lower than 5%, pigs performance was not affected by dietary NDJKM; However, when addition level of NDJKM was higher than 5%, average feed intake and average daily gain was decreased and feed converse ratio was incerased with the increasing levels of NDJKM.(2) The toleration of PEs concentration of growing pigs was 5.50 mg/kg diet considering the pig production cost and healthy growth.