生态学报2017，Vol.37Issue(6)：1994-2004,11.DOI:10.5846/stxb201510031998
科尔沁沙地两种植被类型土壤呼吸动态变化及其影响因子
Dynamic changes in soil respiration of two vegetation types and their influencing factors in Horqin Sandy Land
摘要
Abstract
The soil respiration and related correlation factors of an artificial poplar forest in the Horqin Sandy Land-meadow transitional zone and a Caragana microphylla community in a fixed dune were observed in this study using the LI-6400 soilrespiration supporting system.Results demonstrated the following five phenomena.(1) Daily changes in reserved and removed litter from the artificial poplar forest during the growth and late-growth periods have multiple peaks.(2) Seasonal peaks of reserved litter and removed litter appear in August for the artificial poplar forest and the C.microphylla community.Soil respiration of the artificial poplar forest is much higher than that of the C.microphylla community.(3) Seasonal changes of soil respiration in the artificial poplar forest are significantly correlated with the soil temperature (0-10 cm from the surface) (P＜0.01).Changes in the reserved litter are smaller than changes in the removed litter.(4) Seasonal changes of soil respiration of the C.microphylla community are significantly correlated with soil moisture content (0-10 cm from the surface) (P＜0.01).Unlike soil from the artificial poplar forest,changes in the reserved litter are larger than those in the removed litter.(5) The soil respiration of the artificial poplar forest is exponentially correlated with soil temperature,whereas soil respiration of the C.microphylla community has a significant power function relationship with the soil moisture content.By establishing a two-factor regression model of soil respiration (In Rs) versus soil temperature (T) and soil water content (In θ),contributions of soil temperature and soil moisture content to reserved litter and removed litter were determined using the normalization method.关键词
科尔沁沙地沙丘-草甸相间地区/枯枝落叶/土壤呼吸/土壤温度/土壤含水量Key words
Horqin sandy land/litter/soil respiration/soil temperature/soil water content引用本文复制引用
韩春雪,刘廷玺,段利民,吕扬,闫雪,李凯旋..科尔沁沙地两种植被类型土壤呼吸动态变化及其影响因子[J].生态学报,2017,37(6):1994-2004,11.基金项目
国家自然科学基金重点与面上资助项目(51139002,51479086) （51139002,51479086）
内蒙古水利科技项目 （）
教育部科技创新团队发展计划(IRT13069) （IRT13069）
内蒙古自治区草原英才产业创新创业人才团队 （）
内蒙古农业大学寒旱区水资源利用创新团队(NDTD2010-6)资助 （NDTD2010-6）
