Nutritional Evaluation Of New Reduced-Oligosaccharide Soybean Meal And Canola Meals Produced From New Varieties Of Canola Seeds For Poultry

soybean meal;oligosaccharides;canola meal;amino acid digestibility;metabolizable energy;growth performance

Chen, Xi ; Parsons ; Carl M.

关键词: soybean meal;    oligosaccharides;    canola meal;    amino acid digestibility;    metabolizable energy;    growth performance;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/31219/Chen_Xi.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Reduced-Oligosaccharide Soybean MealThere is currently much interest in developing new genetically modified soybean meal (SBM) that contains reduced oligosaccharide carbohydrates to improve its digestibility in poultry. The nutritional value of a new reduced-oligosaccharide soybean meal (SBM-RO) and conventional SBM (SBM-CV) were evaluated and compared in four experiments. The first experiment was a true metabolizable energy (TMEn) assay with conventional roosters. The second experiment was a precision-fed cecectomized rooster assay that was conducted to determine TMEn and amino acid digestibility. The third experiment was a standardized ileal amino acid digestibility (SIAAD) assay, in which broiler chicks were fed semi-purified diets containing 20% protein (from only the test ingredient) for 17–21 d of age and ileal digesta were collected on Day 21. The fourth experiment was a growth performance trial (8 to 21 d of age) where broiler chicks were fed corn-SBM diets (3.068 MEn/g DM, adequate in all AA) containing 38.84% SBM-RO or SBM-CV. The protein content (100% DM basis) of the SBM-CV and SBM-RO was 51.85% and 54.75%, respectively. The gross energy of the two SBM was similar. The TMEn values in both conventional roosters and cecectomized roosters were significantly higher (P < 0.05) for SBM-RO than for SBM-CV (difference was approximately 200 kcal/kg DM). Amino acid digestibility in cecectomized roosters was not different between SBM-CV and SBM-RO, with the exception of Trp, Ala, Asp and Cys (SBM-RO > SBM-CV, P < 0.05). No significant differences between the SBMs were found for AA digestibility in the SIAAD assay. In the growth performance trial (Experiment 4), the corn-SBM diet containing SBM-RO yielded significantly higher feed efficiency than the diet containing SBM-CV (P < 0.0001). The results indicated that the SBM-RO contains higher ME than the SBM-CV and that digestibility of AA in SBM-RO is similar or slightly higher than SBM-CV.Canola meals produced from new varieties of canola seeds The development of the double low (low erucic acid and low glucosinolates) cultivars of canola has resulted in increased usages of canola meal (CM) in poultry diets. If the CM had more digestible energy, more protein and less glucosinolates, it would likely be more competitive in the world market. This current study evaluated the nutritional value of 7 new genetically modified CM (Test CM), and compared them with conventional CM samples (Conv CM) and soybean meals (SBM). Three experiments were conducted. The first included Conv CM1, Test CM1 (laboratory-processed) and SBM1. The second experiment included Test CM 2 to 6 (laboratory-processed), Conv CM2 and SBM2. The third experiment included Conv CM3-HT, Conv CM4-LT and Test CM7, which were commercially-processed. For each experiment, a precision-fed rooster assay with conventional or cecectomized roosters was conducted to determine TMEn or amino acid (AA) digestibility. Analyzed nutritional composition of the CM samples indicated increases in CP and AA for all Test CMs (49.41 to 50.58% on a dry matter basis) compared to Conv CMs (40.73 to 43.01%). All the Test CMs also contained lower amounts of neutral detergent fiber and acid detergent fiber. When the TMEn values of Test CMs were compared to conventional CM, 6 of the 7 Test CMs had significantly higher values than the conventional CM samples (P < 0.05), but all were lower than SBMs (P < 0.05).¬ For AA digestibility, the Test CMs had higher digestibility coefficients than Conv CM in Experiment 1 and 2 (P < 0.05), and higher concentrations of digestible AA in all 3 experiments. The results of this study indicated that nutritional value of the genetically modified CMs was greater than Conv CM for poultry.