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タイトル: Tensile and shearing properties of leaves in festulolium and perennial ryegrass
その他のタイトル: フェストロリウムとペレニアルライグラスの葉身の引張りとせん断特性
著者: Hongo, Akio
Enkhee, Devee
本江, 昭夫
エンヒェー, デヴィ
キーワード: Festulolium
Grass leaves
Perennial ryegrass
Shearing
Tensile
発行日: Oct-2006
出版者: 帯広畜産大学
引用: 帯大研報
誌名: 帯広畜産大学学術研究報告
巻: 27
開始ページ: 1-7
抄録: The study was carried out to determine tensile and shearing properties of leaves in cultivars (Ba11356 and Ba11358) of festulolium (Festulolium loliaceum), compared with those of diploid (Ba11353 and Aurora) and tetraploid (Ba10855 and Prospero) cultivars of perennial ryegrass (Lolium perenne). Four successive samples of grass leaves were taken from pure stands of third-year swards during July to September, 2004 in Obihiro, Japan. Tensile strength was measured using a 100 N load cell of the breaking test machine. Shear strength was measured about 5 mm apart from a broken point in the tensile test using a pair of the scissors. Cross-sectional area, DM weight and width of leaves were significantly higher in tetraploid perennial and festulolium than in diploid perennial. Shearing strength reached a peak at the central deflection, coinciding with shearing point of main vein. In shearing fracture pattern, a multi-ridged outline of leaf cross section at the adaxial side corresponded to each small peak. Tensile strength, shearing strength and work of fracture were significantly higher in tetraploid perennial and festulolium than in diploid perennial, but tensile stress and stiffness were significantly lower in tetraploid perennial and festulolium than in diploid perennial. Narrower or thinner leaves with lower cross-sectional area tend to have higher longitudinal stiffness. Thus, the morphology and biomechanical behaviour of festulolium leaves were quite similar to those of tetraploid perennial ryegrass.
URI: http://ir.obihiro.ac.jp/dspace/handle/10322/91
ISSN: 1348-5261
権利情報: 帯広畜産大学
出現コレクション:02003学術研究報告(紀要)

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