Studies of population characteristic affecting senescence of Elymus sibiricus

摘要

Plant senescence is an internally regulated and orderly degenerative process leading to the death of single cells, organs or even whole plants during their life cycle (Deborah, 1993 ).Senescence may occur in annual plants and monocarpic perennials abruptly and in iteroparous plants gradually (Silvertown et al.,2001).Elymus sibiricus is a perennial bunchgrass.The objective of this study was to explore the effects of population characteristics on senescence of Elymus sibiricus by researching tillering ability, biomass, modular structures and propagation in Elymus sibiricus at different ages, in order to supply some evidences and material for forage production and also establishing a basis for more detailed research on perennial senescence.