2个苜蓿品种(系)茎秆力学性能与纤维成分研究  

Mechanical properties and fiber composition of two alfalfa strains

作　　者：吕文坤[1] 沈静[1] 曹致中[1] 赵春花[1,2] 

机构地区：[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研究中心,甘肃兰州730070 [2]甘肃农业大学工学院,甘肃兰州730070

出　　处：《草原与草坪》2011年第2期69-73,共5页Grassland and Turf

基　　金：国家科技支撑计划"奶牛优质饲草生产技术研究及开发"(2006BAD04A04)资助

摘　　要：通过对2种苜蓿(Medicago sativa)品种(系)茎秆进行拉伸、剪切、弯曲试验,并分析其纤维成分含量,对苜蓿茎秆抗倒伏性能进行了评价。结果表明,低纤维苜蓿新品种(系)茎秆抗拉强度、抗剪切强度、抗弯曲刚度分别较甘农3号降低7.09 MPa,5.11 Mpa和0.21 MPa,茎秆拉伸弹性模量、剪切弹性模量、弯曲弹性模量,分别比甘农3号降低347.72 MPa,15.49 MPa、22.59 MPa,初花期茎秆NDF和ADF分别比甘农3号降低4.07%,6.18%,新品种(系)茎秆纤维含量低是其抗倒伏能力弱于甘农3号的原因之一。The tensile strength,shear strength and bending strength of two alfalfa strains（Low Fiber Content and Gannong No.3）,which are relating to the lodging resistance properties,were studied.The results showed that the tensile strength,shear strength and bending strength of Low Fiber Content strain were 7.09 MPa,5.11 MPa and 0.21 MPa lower than Gannong No.3,and the elastic modulus of tensile,elastic modulus of shear strength and elastic modulus of bending strength were 347.72 MPa,15.49 MPa and 22.59 MPa lower.For the contents of NDF and ADF in early flowering stage,they were 4.07% and 6.18% lower respectively.This might be caused by the lower fiber content of Low Fiber Content strain.

关 键 词：苜蓿 茎秆 力学性能 比较 

分 类 号：S54[农业科学—作物学]