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Tensile and shearing properties of leaves in festulolium and perennial ryegrass OAK
Hongo, Akio; Enkhee, Devee; 本江, 昭夫; エンヒェー, デヴィ.
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...
Palavras-chave: Festulolium; Grass leaves; Perennial ryegrass; Shearing; Tensile.
Ano: 2006 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/91
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採食時のヒツジが使うバイト強度におよぼすオーチャードグラス葉身の曲げ強度とせん断強度の影響 OAK
HONGO, Akio; DEVEE, Enkhee; TOUKURA, Yuji; ARO ARO, Juan Marcos; HIRATA, Masahiro.
The biting force used by sheep was investigated in order to clarify the effect of bending and shearing properties of leaf blade sections of orchardgrass (Dactylis glomerata). Five, 10, 15, 20 or 25 leaf blade sections per loadcell from basal and middle parts were offered to sheep. The three-dimensional biting forces were digitally recorded at 0.006-second intervals using the threedimensional loadcell. DM weight per mean biting force (benefit/cost ratio) was not significantly different among any treatments, and its grand mean was 16.7±1.1 mg-DM/N. There was a significant correlation between bending strength and shearing strength, strongly suggesting that sheep may recognize chewing ease of leaf blade sections through sensing bending strength prior to...
Palavras-chave: Bending; Biting force; Orchardgrass; Shearing; Sheep; 曲げ; バイト強度; オーチャードグラス; せん断; ヒツジ.
Ano: 2009 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2646
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