1、 28 2 Vol.28, No.2 2008 M 3 TROPICAL GEOGRAPHY Mar.,2008 l 2007 ?f r s MSS 1996 24& 41 8 Z T1 3 3 1 J 3 19967 3 22& 27 9 S 2 | 3 “d# 3 r J 3 19951 4 403& 414 10 Andel JAronson JRestoration ecologyMOxford Blackwell Publishing2005 11 Tf m 3 s J 3 199216 1 1& 10 12 f 2| M S 1994127& 151 13 Falk D APalm
2、er M AZedler J BFoundations of Restoration EcologyMLondon Island Press2006 14 Hobbs R JThe future of restoration ecology challenges and opportunitiesJRestoration Ecology200513 239& 241 15 Temperton V MHobbs R JNuttle Tet alAssembly rules and restoration ecologyMLondon Island Press2004 The Changes of
3、 Ecological Characteristics of Degraded Hilly Grassland during the Transformation from Herb Dominance to Shrub Dominance in Heshan, Guangdong BAN Jia-wei1,2YIN Zuo-yun1,3ZHANG Qian-mei1WEI Ming-si4(1South China Botanical GardenCASGuangzhou 510650China 2Graduate School, CASBeijing 100049China 3Guangd
4、ong Forest Research InstituteGuangzhou 510520China 4Guangxi Botanical Garden of Medicinal PlantNanning530023China) Abstract By the fieldwork and indoor experimentthe changes of the community structure and function of degraded hilly grassland such as plant diversitybiomassand soil nutritionduring the
5、 vegetation restoration from herb dominance to shrub dominance in south subtropical HeshanGuangdongwere examinedThe results showed that during the restorationthe plant diversity and soil moisture capacity of the community increasedthe soil organic matter and total N content were doubled or even more
6、and the biomass also increasedWith the development of vegetation coverthe environmental factors such as radiation conditionsoil moisture and nutrition of early degraded hilly land were amelioratedSuch improvement created suitable microenvironment for the colonization of shrubs and influenced gradual
7、ly the community structurein turn increased the plant diversity and biomassHoweverthe plant diversity and soil moisture capacity of the community dominated by shrubs were still at a low levelas compared with the zonal communityThe natural restoration of the vegetation in the degraded hilly grassland
8、 will be a long runThe alternative methods such as artificial forestation can reestablish the arboreal tree layer in the community firstlyand then increase the diversity under storied vegetation to speed up the vegetation restoration on the degraded hilly land Key words degraded hilly grassland community characters natural restoration Heshan
