Preliminary evaluation of five elephant grass cultivars harvested at different time for sugar production  

收获于三个不同时期的五种象草产糖能力的初步评价（英文）

作　　者：李媛媛 张叶龙 郑洪波 杜健 张红漫 吴娟子 黄和 

机构地区：[1]College of Science, Nanjing Tech University [2]China State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University [3]Institute of Animal Science, Jiangsu Academy of Agricultural Sciences

出　　处：《Chinese Journal of Chemical Engineering》2015年第7期1188-1193,共6页中国化学工程学报（英文版）

基　　金：Supported by Jiangsu Agriculture Science and Technology Innovation Fund(CX(11)4048)

摘　　要：Five elephant grass cultivars, Pennisetum purpureum, cv. Huanan （Huanan）, P. purpureum, cv. N51 （N51）, P. purpureum, cv. Sumu No. 2 （Sumu-2）, （ Penniseturn americanum x P. purpureum ） x P. purpureum cv. Guimu No. 1 （Guimu-1） and P. americanum cv. Tift23A x P. purpureum cv. Tilt NS1 （Hybrid Pennisetum）, at three harvest stages were studied. With dilute sulfuric acid pretreatment followed by enzymatic hydrolysis, it is found that cel- lulose conversion of the five elephant grass cultivars harvested in August and September is higher than that har- vested in October. The cellulose conversion for elephant grass cultivars harvested in August and September follows an order of Hybrid Pennisetum 〉 Sumu-2 〉 Huanan 〉 Guimu-1 〉 N51. This may be explained by the fact that lignification is gradually strengthened with time, inhibiting degradation of cellulose and hemicellulose. Moreover, cellulose conversions of Hybrid Pennisetum, Sumu-2 and Huanan harvested in August and September are higher based on hierarchical clustering results.Five elephant grass cultivars, Pennisetum purpureum. cv. Huanan(Huanan), P. purpureum. cv. N51(N51),P. purpureum. cv. Sumu No. 2(Sumu-2),(Pennisetum americanum × P. purpureum) × P. purpureum cv. Guimu No. 1(Guimu-1) and P. americanum cv. Tift23 A × P. purpureum cv. Tift N51(Hybrid Pennisetum), at three harvest stages were studied. With dilute sulfuric acid pretreatment followed by enzymatic hydrolysis, it is found that cellulose conversion of the five elephant grass cultivars harvested in August and September is higher than that harvested in October. The cellulose conversion for elephant grass cultivars harvested in August and September follows an order of Hybrid Pennisetum N Sumu-2 N Huanan N Guimu-1 N N51. This may be explained by the fact that ligni fication is gradually strengthened with time, inhibiting degradation of cellulose and hemicellulose.Moreover, cellulose conversions of Hybrid Pennisetum, Sumu-2 and Huanan harvested in August and September are higher based on hierarchical clustering results.

关 键 词：Energy crop Elephant grass Dilute sulfuric acid pretreatment Enzymatic hydrolysis Glucose 

分 类 号：TQ353[化学工程]