影响棉籽饼生产单细胞蛋白饲料因素分析

对四种影响棉籽饼生产单细胞蛋白饲料因素作了分析.这四种因素是基础发酵料中棉籽饼的不同配比,发酵料含水率,PH值及发酵过程中对发酵料的翻动次数,结果表明,基础料中棉籽饼占80%,含水率为60%PH值为5.2时对饲料生产及产品粗蛋白质含量影响最大,发酵中翻动次数对产品质量及饲料生产影响不大.     

Effects of microwave irradiation on ruminal protein degradation and intestinal digestibility of cottonseed meal

The objectives of this study were to determine the effects of microwave irradiation on ruminal degradability and intestinal digestibility of crude protein (CP) and to monitor the fate of true proteins of cottonseed meal (CSM) in the rumen. Duplicate nylon bags of untreated or irradiated CSM (microwave power of 800 W for 2, 4 and 6 min) were suspended in the rumen of four non-lactating Holstein cows for up to 48 h, and resulting data were fitted to non-linear degradation model to calculate degradation parameters of CP. Proteins of untreated and treated CSM bag residues were fractionated by gel electrophoresis. Intestinal digestibility of CP was measured using the mobile nylon bag technique. From in situ results, microwave irradiation decreased (P < 0.05) the water soluble fraction and degradation rate, but increased the potentially degradable fraction of CP. The effective degradability of CP decreased (P < 0.05) as processing period increased. Irradiation for 2 and 4 min increased (P < 0.05) intestinal digestibility of ruminally undegraded CP, but extending to 6 min lowered (P < 0.05) the beneficial effect that 4 min had on intestinal CP digestibility. Electrophoretic results indicated that globulin 9S in untreated CSM (whereas globulin 9S, globulin 5S and albumin 2S in microwave irradiated CSM) make the bulk of escaped protein. Based upon these results, microwave irradiation at a power of 800 W for 4 min had the greatest potential to increase digestible undegraded protein.     

CTP-5消毒剂对食用菌种植基质的灭菌效果

研究了不同浓度新型环保消毒剂CTP-51和CTP-52对食用菌培养料之一的棉籽壳的灭菌效果。试验结果表明,随着CTP-5消毒剂浓度的增加,培养基上棉籽壳周围的菌落数减少,灭菌效果增强;CTP-52消毒剂的灭菌效果整体优于CTP-51消毒剂,当CTP-52消毒剂浓度为16 mg/L时,培养物周围无杂菌生长,与高压蒸汽灭菌对照组一样,达到了彻底灭菌的效果。     

2种棉副产品脱毒剂应用猪生长育肥的研究

分别比较2种棉副产品脱毒剂对猪生长肥育性能和胴体品质的影响,并进行经济效益的分析。结果表明:2种脱毒剂对生长育肥猪生长肥育性能影响与对照组相比差异显著(P<0.05);饲料成本与对照组相比降低,提高了经济效益。