Stem Petiole node Internode Internode F■RAGE Petiole L0g影 College of animal science,Northwest Agriculture Forestry University 西北农林科技大学动物科技学院草业科学系__________________________________________________________________ College of animal science, Northwest Agriculture & Forestry University 西北农林科技大学动物科技学院草业科学系 Copyright reseved by Long Mingxiu