应用生态学报2017，Vol.28Issue(4)：1087-1093,7.DOI:10.13287/j.1001-9332.201704.030
不同养分环境下木荷种源生长和根系发育对邻株竞争响应的差异
Different responses of growth and root development of Schima superba provenance to the adjacent plant competition in different nutrient conditions
摘要
Abstract
Growth and root development of three Schima superba seedling provenances were influenced by adjacent plant competition in the homogeneous and heterogeneous nutrient environment,which revealed the reasons of S.superba competition differences in the different genotypes.The results indicated that,compared with homogeneous nutrient environment,all three S.superba provenances showed higher seedling height,more dry matter accumulation,and significant root proliferation in heterogeneous nutrient environment.Under heterogeneous nutrient environment,the seedlings of S.superba from Jian'ou of Fujian exhibited higher competitive advantage in growth than that of S.superba from Longquan of Zhejiang and Xinfeng of Jiangxi,especially standing out under mixed cultivation with seedlings of Cunninghamia lanceolata.Under mixed cultivation,the root growth parameters of S.superba such as root length,root surface area and volume increased by 20.4％-69.0％ compared with the single plant,which enhanced the foraging ability and growth advantage.To some extent,however,the root development in Longquan of Zhejiang and Xinfeng of Jiangxi was suppressed when subjected to the pattern of mixed cultivation.Besides,the root growth and development of all three S.superba provenances were suppressed,which might be due to their root self-recognition in the pattern of mono cultivation.Therefore,the seedling growth in Jian'ou of Fujian decreased significantly,but seedling growth in Longquan of Zhejiang and Xinfeng of Jiangxi was not suppressed,even increased evidently,as their root physiological plasticity might play the crucial role in seedling growth.Hence the S.superba from Jian'ou of Fujian with high foraging efficiency and competition ability was suggested with the method of mixed forestation to improve the S.superba forest plantation productivity.关键词
木荷/种源/邻株竞争/生长/根系可塑性Key words
Schima superba/provenance/neighbor competition/growth/root plasticity引用本文复制引用
姚甲宝,楚秀丽,周志春,童建设,王晖,余家中..不同养分环境下木荷种源生长和根系发育对邻株竞争响应的差异[J].应用生态学报,2017,28(4):1087-1093,7.基金项目
本文由‘十三五’国家重点研发专项重点课题项目(2016YFD0600606)和国家级林业科学技术推广项目([2014]06)资助 This work was supported by the 13th Five Years Key Scientific Research Project (2016YFD0600606) and the National Forestry Science and Technology Popularization Projects ([2014]06). （2016YFD0600606）
