Acta Agrestia Sinica ›› 2020, Vol. 28 ›› Issue (3): 835-843.DOI: 10.11733/j.issn.1007-0435.2020.03.031

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Comprehensive Evaluation on Corn Stalk Nutrient Quality under Different Steam Explosion Treatments

RAN Fu1, JIAO Ting1, LEI Zhao-min2, ZHAO Sheng-guo2, GAO Xue-mei1, LI Chang-ning1, QIN Wei-na1, LI Xiong-xiong1   

  1. 1. College of Pratacultural Science, Gansu Agricultural University/Key Laboratory of Grassland Ecology System, Ministry of Education, Sino-U. S. Centers for Grazing land Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China;
    2. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China
  • Received:2020-02-21 Revised:2020-03-20 Online:2020-06-15 Published:2020-05-30

不同汽爆处理下玉米秸秆品质综合评价

冉福1, 焦婷1, 雷赵民2, 赵生国2, 高雪梅1, 李昌宁1, 秦伟娜1, 李雄雄1   

  1. 1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心, 甘肃 兰州 730070;
    2. 甘肃农业大学动物科学技术学院, 甘肃 兰州 730070
  • 通讯作者: 焦婷
  • 作者简介:冉福(1994-),男,甘肃会宁人,硕士研究生,主要从事反刍动物营养研究,E-mail:1721236283@qq.com;
  • 基金资助:
    玉米秸秆饲用化汽爆破壁发酵关键技术研究示范项目(20180408);甘肃省现代草食畜产业技术体系(GARS-CS-4)农业部公益性行业(农业)科研专项(项目编号:201003019,201503134和201303059);现代农业产业技术体系(CARS-40-09B);青年导师扶持基金(034-052003)共同资助

Abstract: To solve problem of forage shortage and keep grass-animal balance in animal feeding practice,corn straw was treated by different steam explosion chamber pressures and different moisture levels. The corn straw nutrients after explosion were analyzed. The results showed that,CP,EE and monosaccharides of explored corn straw were significantly increased while NDF,ADF and ADL decreased significantly compared with those with no explosion (P<0.05). The results of CNCPS showed that steam explosion could convert slow-degradation components into fast degradation components The cluster analysis also showed that chamber pressure at 1.25 MPa with 50%~60% moisture has better performance,which is consistent with the CNCPS results. In conclusion,1.25 MPa pressure with 50%~60% is the best parameter for corn straw steam explosion.

Key words: Corn stalk, Steam explosion, Chamber pressure, Raw material moisture, CNCPS system

摘要: 为缓解农牧交错地因天然草原破坏引起的饲草短缺、草畜平衡等问题,保证牛羊粗饲料的充足供给及畜牧业健康发展,本试验以玉米秸秆为原料,采用蒸汽爆破技术,通过调控汽爆腔压力和原料水分,对玉米秸秆进行汽爆处理。结果表明:蒸汽爆破处理后玉米秸秆粗蛋白质(Crude protein,CP)、粗脂肪(Crude fat,EE)和单糖(Monosaccharide)等养分相对含量与未汽爆秸秆相比均明显增加;中性洗涤纤维(Neutral detergent fiber,NDF)、酸性洗涤纤维(Acid detergent fiber,ADF)和酸性洗涤木质素(Acid detergent lignin,ADL)相对含量显著下降(P<0.05),康奈尔净碳水化合物-蛋白质体系(Cornell Net Carbohydrate and Protein System,CNCPS)评价结果表明,蒸汽爆破处理能将玉米秸秆中慢速降解成分转化为快速降解成分;聚类分析结果表明,汽爆处理秸秆与原样营养相对含量之间差异显著,汽爆腔压力1.25 MPa,原料水分50%~60%最优;且与CNCPS体系评价基本一致。在汽爆腔压力1.25 MPa和原料水分50%~60%条件下,营养成分相对含量增加最为显著,为汽爆玉米秸秆预处理最佳条件。

关键词: 玉米秸秆, 蒸汽爆破, 汽爆腔压力, 原料水分, CNCPS体系

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