刈割对克氏针茅草原群落优势与亚优势植物的影响

应用生态学报 ›› 2012, Vol. 23 ›› Issue (10): 2648-2654.

刈割对克氏针茅草原群落优势与亚优势植物的影响

李鑫^1,2,3,石凤翎^1**,高艳²,赵明旭³,李凌浩²

(¹内蒙古农业大学生态环境学院, 呼和浩特 010019; ²中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093; ³内蒙古多伦县草原工作站, 内蒙古多伦 027300)

出版日期:2012-10-18 发布日期:2012-10-18

Effects of cutting on the dominant and subdominant plant species in a Stipa krylovii steppe of Inner Mongolia.

LI Xin^1,2,3, SHI Feng-ling¹, GAO Yan², ZHAO Ming-xu³, LI Ling-hao²

(¹College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010019, China; ²State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; ³Duolun Grassland Management Station, Duolun 027300, Inner Mongolia, China)

Online:2012-10-18 Published:2012-10-18

摘要/Abstract

摘要： 基于内蒙古中部克氏针茅草原长期刈割试验，分析了不同留茬高度下克氏针茅草原植物群落中5个优势及亚优势种地上生物量和群落稳定性的变化.结果表明：留茬高度在10 cm以上时对5种植物地上生物量的影响较小.留茬高度为10 cm适于冷蒿生长，而不利于克氏针茅的生长.糙隐子草在留茬高度为2 cm时表现最佳.黄囊苔草对群落的贡献在留茬高度为5 cm时最大，此时其生物量与刈割年限呈正相关.留茬高度为2和15 cm不利于星毛委陵菜生长.植株较高、竞争力强的多年生植物对干扰的耐受能力较强，刈割的留茬高度不低于10 cm时，有益于维持草原生态系统的稳定性.

Abstract: Based on the long-term cutting experiment, this paper analyzed the responses of the aboveground biomass of five dominant and subdominant plant species and the community stability in a Stipa krylovii steppe of Inner Mongolia to various cutting height. Cutting with a stubble height of >10 cm had slight effects on the aboveground biomass of the five species. Cutting with a stubble height of 10 cm benefited the growth of Artemisia frigida but made against the growth of Stipa krylovii. Cleistogenes squarrosa at the stubble height of 2 cm performed best, and Carex korshinskyi at the stubble height of 5 cm contributed most to the community, with the biomass positively correlated with the cutting years. Potentilla acaulis growth was detrimentally affected at the stubble heights of 2 and 15 cm. Overall, perennial species with higher plant height and stronger competitive ability were more tolerant to disturbances, and a minimum cutting height of 10 cm should be applied to maintain a high stability of the steppe ecosystem.

李鑫1,2,3,石凤翎1**,高艳2,赵明旭3,李凌浩2. 刈割对克氏针茅草原群落优势与亚优势植物的影响[J]. 应用生态学报, 2012, 23(10): 2648-2654.

LI Xin1,2,3, SHI Feng-ling1, GAO Yan2, ZHAO Ming-xu3, LI Ling-hao2. Effects of cutting on the dominant and subdominant plant species in a Stipa krylovii steppe of Inner Mongolia.[J]. Chinese Journal of Applied Ecology, 2012, 23(10): 2648-2654.