蒸汽爆破技术对棉籽粕中游离棉酚脱毒效果研究

发布时间：2018-06-04 04:22

本文选题：蒸汽爆破 + 棉籽粕　；参考：《动物营养学报》2016年02期

【摘要】：本试验旨在研究蒸汽爆破技术对棉籽粕中游离棉酚的脱毒效果。采用市售棉籽粕,对其进行7种不同的蒸汽爆破处理,蒸汽压强均固定为2.0 MPa,以水料比为0时进行维压30 s的蒸汽爆破处理为对照,水料比为30%、50%时分别进行维压10、20、30 s的爆破处理,每处理重复3次,以游离棉酚含量、蛋白质溶解度为指标,筛选出较佳的处理测定氨基酸含量和营养物质猪仿生消化率数据。结果表明:固定蒸汽压强时,游离棉酚的脱毒率与蛋白质溶解度随着蒸汽维压时间延长而增加,随着水料比的增加先增大后减少。以游离棉酚的脱毒效果与蛋白质溶解度为指标,筛选出的适宜蒸汽爆破处理为蒸汽压强2.0 MPa,水料比30%,维压时间30 s。此时棉籽粕中游离棉酚含量达85.0 mg/kg,脱毒率达87.0%,蛋白质溶解度为42.3%。与对照组相比,蒸汽爆破可极显著降低棉籽粕中赖氨酸含量和精氨酸含量(P0.01),对体外干物质消化率和总能消化率无显著影响(P0.05),极显著降低体外粗蛋白质消化率和赖氨酸消化率(P0.01)。由此可见,蒸汽爆破处理可降低棉籽粕游离棉酚含量、蛋白质溶解度、赖氨酸含量、精氨酸含量、体外粗蛋白质消化率和赖氨酸消化率。筛选出的适宜蒸汽爆破处理为蒸汽压强2.0 MPa,水料比30%,维压时间30 s。
[Abstract]:The purpose of this experiment was to study the detoxification effect of free gossypol in cottonseed meal by steam blasting. Seven different steam blasting treatments were carried out for cottonseed meal, and the steam pressure was fixed at 2.0 MPa, compared with 30 s steam blasting with water / material ratio of 0. The ratio of water to material was 30 and the water to material ratio was 30 and 50. The blasting treatment was carried out for 10 ~ 20 ~ 30 s respectively, and the treatment was repeated three times. With the content of free gossypol and the solubility of protein as the index, the best treatment was selected to determine the amino acid content and the bionic digestibility of the nutrient. The results showed that the detoxification rate and protein solubility of free gossypol increased with the increase of vapor pressure time, and then decreased with the increase of water-material ratio. According to the detoxification effect and protein solubility of free gossypol, the suitable steam blasting treatment was steam pressure 2.0 MPa, water / material ratio 30, maintenance pressure time 30 s. The content of free gossypol in cottonseed meal was 85.0 mg / kg, the detoxification rate was 87.0 and the solubility of protein was 42.3%. Compared with the control group, the content of lysine and arginine in cottonseed meal was significantly decreased by steam blasting, and the dry matter digestibility and total energy digestibility in vitro were not significantly affected by steam blasting, and the in vitro crude protein digestibility and lysine digestibility were significantly decreased by steam blasting. It can be seen that the free gossypol content, protein solubility, lysine content, arginine content, in vitro crude protein digestibility and lysine digestibility of cottonseed meal can be reduced by steam blasting. The suitable steam blasting treatment is steam pressure 2.0 MPa, water to material ratio 30 and maintenance pressure time 30 s.
【作者单位】：河南科技学院动物科学学院畜禽智能化清洁生产河南省工程实验室;
【基金】：河南省现代农业产业体系——生猪产业体系(S2012-06-02) 国家级大学生创新训练项目(201310467024)
【分类号】：S816.4

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