生态学杂志2025，Vol.44Issue(3)：755-762,8.DOI:10.13292/j.1000-4890.202503.051
施肥时间对退化草甸草原地下芽库及其与地上植被关系的影响
Effects of fertilization timing on belowground bud bank and its relationship with vegetation of degraded meadow steppe
摘要
Abstract
Climate change and human disturbance have resulted in the continuous increase of degraded grassland area in China.Nutrient addition is considered as one of the effective measures for grassland restoration.We conduc-ted a nitrogen(N)and phosphorus(P)addition experiment in a degraded grassland in the semi-arid meadow steppe of Inner Mongolia.We investigated the responses of belowground bud banks and their relationships with veg-etation to nutrient additions at different times(early-spring or middle-summer).Results showed that summer nutri-ent addition significantly increased bud density and aboveground shoot density,while early-spring nutrient addition had no significant influences.Nutrient additions at different times significantly decreased meristem limitation index.Plant functional groups showed specific responses to nutrient addition.Nutrient addition significantly reduced shoot density of forbs.Summer nutrient addition significantly increased bud density and shoot density of bunchgrasses,meristem limitation index,of which was significantly decreased under nutrient addition at different times.Nutrient addition significantly increased both bud density and shoot density of rhizomatous grasses.Our results indicate that summer nutrient addition greatly increases vegetation regeneration potential,and different responses of plant func-tional groups to nutrient addition determine vegetation restoration and succession dynamics in degraded meadow steppe.关键词
芽库/退化草地/养分添加/植物功能群/植被恢复Key words
bud bank/degraded grassland/nutrient addition/plant functional group/vegetation restoration引用本文复制引用
陶金,田家泰,李冬梅,马群,张志铭,刘伟,潘庆民,钱建强..施肥时间对退化草甸草原地下芽库及其与地上植被关系的影响[J].生态学杂志,2025,44(3):755-762,8.基金项目
国家自然科学基金项目(41877542)资助. （41877542）
