文献类型：期刊文献

中文题名：板根对海南岛吊罗山热带低地雨林土壤理化性质的影响

英文题名：Effects of buttressed roots on soil physical and chemical properties of soil in lowland rainforests of Diaoluoshan,Hainan,China

作者：王旭[1] 韩天宇[2] 阮璐坪[3] 孟京辉[3]

第一作者：王旭

机构：[1]中国林业科学研究院热带林业研究所,广州510520;[2]生态环境部环境工程评估中心,北京100020;[3]北京林业大学,北京100083

年份：2022

卷号：28

期号：3

起止页码：751-758

中文期刊名：应用与环境生物学报

外文期刊名：Chinese Journal of Applied and Environmental Biology

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：中央级科研院所基本业务费专项资金项目(CAFYBB2017SY017)资助。

语种：中文

中文关键词：板根;土壤理化性质;生境异质性;热带雨林

外文关键词：buttress root;physical and chemical property of soil;habitat heterogeneity;tropical rainforest

分类号：S714.2

摘要：热带雨林作为最复杂的森林生态系统之一,一直是生态学领域的研究热点.为揭示热带雨林中普遍存在的板根现象对于土壤理化性质的影响,在海南省吊罗山自然保护区的典型低地雨林中,选择板根树及非板根树根盘区域取样,分析板根区与非板根区土壤理化性质差异,进一步探讨板根对热带森林的生态作用.结果显示:旱雨两季,所有板根分布区和非板根区各土层的土壤机械组成大小顺序均为粉粒>砂粒>黏粒,黏粒组分雨季时变异系数明显高于旱季;板根区和非板根区坡位间土壤温度无显著差异,但土壤水分差异显著,尤其是旱季(P<0.05);在旱季时板根区土壤pH值高于非板区,而在雨季时无显著差异.板根对不同季节和土层间土壤化学指标产生较大的影响,在旱季仅板根区域的土壤总有机碳、全氮、全磷、碱解氮、有效磷均显著高于非板根区域,而雨季时所有指标均高于非板根区,其中板根对土壤有机碳、全氮和有效磷的含量提高最明显,分别提高了21.04%-86.30%、23.60%-99.74%和36.00%-103.45%;板根不仅对土壤水分有拦截作用,还对土壤养分具有拦截作用.因此,板根的发生有利于提高热带雨林生态系统生境异质性,形成板根上坡位养分的富集区和土壤高固碳区.(图2表10参32)
Tropical rain forests are one of the most complex forest ecosystems and have long been the focus of ecological research.The aim of the study was to investigate the differences in the physico-chemical properties of soil in areas with buttress and non-buttress roots across different seasons and soil layers.We selected the typical lowland rainforests of the Diaoluoshan Nature Reserve in Hainan Province as the sample site.We collected soil samples from different soil layers of buttress and non-buttress root areas in dry and wet seasons and analyzed the differences in the physico-chemical properties of the soil,to investigate the ecological function of buttresses.The results showed the mechanical composition of the soil in buttress and non-buttress root areas in different soil layers in dry and wet seasons to be of the order:silt>sand>clay.The variation coefficient of the clay fraction in the wet season was significantly higher than that in the dry season.Soil temperature was not significantly different between buttress and non-buttress root areas across different seasons and soil layers.However,the soil moisture content was significantly higher in the buttress root areas,especial in the dry season(P<0.05).The soil pH of buttress root areas was significantly higher than that in the non-buttress root areas in the dry season,while the buttress roots exerted no effect on the pH of the soil in the wet season.Buttress roots had a significant effect on other soil chemical indices across different seasons and soil layers.In the dry season,the organic carbon,total nitrogen,total phosphorus,hydrolyzed nitrogen,and available phosphorus contents in the soil from buttress root areas were significantly higher than those of the soil from non-buttress root areas.In the wet season,all the indices were higher in the buttress root areas than in the non-buttress root areas.The organic carbon,total nitrogen,and available phosphorus contents increased significantly by 21.04%-86.30%,23.60%-99.74%,and 36.00%-103.45%,respectively.Buttress roots can retain not only soil water but also soil nutrients.Therefore,buttress roots are beneficial in improving the habitat heterogeneity of tropical rainforest ecosystems and forming nutrient enrichment areas and high soil carbon sequestration areas in the upper buttress roots.