文献类型：期刊文献

英文题名：Effects of allelopathy and availability of nutrients and water resources on the survival and growth of plant species in a natural Dacrydium forest

作者：Wu, Chunyan[1,2] Chen, Yongfu[2] Grenier-Heon, David[3]

第一作者：吴春燕

通信作者：Chen, YF[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat,State Key Lab Tr, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[3]Univ Quebec Montreal, Inst Environm Sci, Dept Biol Sci, Montreal, PQ, Canada

年份：2022

卷号：52

期号：1

起止页码：100-108

外文期刊名：CANADIAN JOURNAL OF FOREST RESEARCH

收录：;EI(收录号：20220311474879);Scopus(收录号：2-s2.0-85122141895);WOS:【SCI-EXPANDED(收录号:WOS:000743876000009)】；

基金：We thank all the researchers who made their data available for this study. This research was funded by National Natural Science Foundation of China (32001308) , Fundamental Research Funds of CAF (CAFYBB2020SY004) , and National Natural Science Foundation of China (General Program) (31971652) .

语种：英文

外文关键词：aqueous extracts; nutrient irrigation; resource availability; survival rate; growth rate; rare and endangered species

摘要：A comprehensive understanding of mechanisms of allelopathy and resource availability is critical for protecting rare and endangered species, biodiversity, and ecosystems. We treated 20 major plant species with three concentrations of an aqueous extract of Dacrydium pierrei Hickel litter and different irrigation and nutrients to compare the relative importance of allelopathy and resource availability on roots, stem growth, and seed germination, using bioassays. The results showed that the height, ground diameter, and aboveground biomass of individuals increased more quickly in the early stage, and the rate of increase tended to slow down in the later stages. The allelopathy was species specific (inhibitory, neutral, or promotive), and the survival rate and growth rate of saplings changed significantly along a resource treatment gradient (P < 0.05), indicating that the native species diversity was reduced by lower or higher resource availability in natural forests. The effect of allelopathy on trees was relatively weak during the treatments, and that of resource availability was relatively strong. Resource availability is relatively more important than allelopathy in mediating the reduction in plant biodiversity. Therefore, water and nutrient availability and the species and number of allelochemicals released by plants have substantial influences on the survival and growth of plant species in a natural Dacrydium forest.