中文摘要：

以北方典型多年生豆科牧草小冠花的匍匐型和直立型两个新品系以及原始亲本绿宝石小冠花（半匍匐型,为对照品种）的收割期茎秆为研究对象,采用微机控制电子万能试验机和波钦诺克方法,测试了茎秆的主要生物力学特性。结果表明：直立型小冠花茎秆的抗拉强度最大（14.88~26.80 MPa）;匍匐型、半匍匐型、直立型小冠花茎秆平均最大载荷力分别为88.88 N、152.70 N和187.10 N,鲜样纤维素平均质量分数分别为13.59%、13.87%、15.52%,木质素平均质量分数分别为4.47%、4.18%、3.95%,蛋白质平均质量分数分别为3.83%、4.55%、2.74%,并随含水率的降低（或生育期增长）,纤维素、木质素、蛋白质的质量分数均增大。匍匐缠结牧草茎秆强度和刚度主要取决于纤维素、木质素的质量分数及其链接形式和排列方式。新品系直立型小冠花木质素/纤维素质量分数比值较匍匐、半匍匐型低,较易机械化收获。

英文摘要：

Three kinds of stems in harvesting period,creeping type,erect crownvetch strain and half crawl type（Coronilla varial.） were chosen to perform the biomechanical nature of forage stems by the electronic testing machine CMT2502 and Х.Н.Починок method.Results showed that the tensile strength of erect crownvetch strain stems were maximum（14.88～26.80MPa）.The average largest load of creeping type,half crawl type and erect crownvetch strain were 88.88N,152.70N and 187.10N,respectively;the cellulose contents of above stems were 13.59%,13.87% and 15.52%,respectively;the lignin contents of above stems were 4.47%,4.18% and 3.95%,respectively;the protein contents of above stems were 3.83%,4.55% and 2.74%,respectively.The cellulose contents,lignin contents and protein contents increased with the reduction of moisture content.The strength and stiffness of creeping tangled forage stems mainly depended on the content,connection mode and alignment of cellulose and lignin.Erect crownvetch strain were easier to mechanized harvest than others because of its low ratio of lignin to cellulose.