CAJ | 학술논문

通过测定生物多样性各指标、地上－地下生物量、枯落物量、土壤理化因子以及土壤微生物量碳氮，研究了自然状态下荒漠草原6种群落生物多样性与生物量的关系及其影响因子。结果表明：荒漠草原不同群落丰富度、均匀度与多样性指数变化趋势一致；地上生物量与地下生物量呈指数关系，表明荒漠草原群落呈异速生长模式；生物多样性与地上生物量呈单峰曲线，与地下生物量呈线性关系，初步表明荒漠草原不同群落地上部分种间作用、资源利用程度基本一致，生物多样性抑制了地上生物量，但并没有抑制其地下生物量；地表枯落物与地下生物量呈极显著的线性相关关系（P ＜0．01），初步表明了地下生物量更加依赖于地表枯落物。相关分析表明，荒漠草原生物多样性指数和生物量影响因子存在明显差异，自然条件下土壤含水量、有机碳、全氮以及有效养分对地下生物量贡献较大，土壤含水量和有机碳对地上生物量贡献较大，土壤微生物量碳和氮对群落多样性指数贡献较大。
통과측정생물다양성각지표、지상－지하생물량、고락물량、토양이화인자이급토양미생물량탄담，연구료자연상태하황막초원6충군락생물다양성여생물량적관계급기영향인자。결과표명：황막초원불동군락봉부도、균균도여다양성지수변화추세일치；지상생물량여지하생물량정지수관계，표명황막초원군락정이속생장모식；생물다양성여지상생물량정단봉곡선，여지하생물량정선성관계，초보표명황막초원불동군락지상부분충간작용、자원이용정도기본일치，생물다양성억제료지상생물량，단병몰유억제기지하생물량；지표고락물여지하생물량정겁현저적선성상관관계（P ＜0．01），초보표명료지하생물량경가의뢰우지표고락물。상관분석표명，황막초원생물다양성지수화생물량영향인자존재명현차이，자연조건하토양함수량、유궤탄、전담이급유효양분대지하생물량공헌교대，토양함수량화유궤탄대지상생물량공헌교대，토양미생물량탄화담대군락다양성지수공헌교대。
Impact factors and relationships between plant biodiversity and biomass of different communities of desert steppe in an unmodified condition were determined using biodiversity indices,soil physical and chemical factors and assessment of aboveground and underground biomass.The results showed that species richness and diversity varied similarly in different communities.Exponential relationships between aboveground biomass and underground biomass showed that the desert steppe community displayed allometric growth patterns.The re-sponse of community richness to aboveground biomass was unimodal,while that to underground biomass was linear.Underground biomass was positively correlated with surface litter.Soil moisture,soil organic carbon, total nitrogen and available nutrients also contributed to underground biomass while soil moisture and soil or-ganic carbon greatly contributed to aboveground biomass.Soil microbial biomass,soil carbon and nitrogen had a significant influence on community diversity indices.