摘要
本研究以草甸、典型及荒漠草原为研究对象,分析了不同草地类型下物种多样性与群落地上净初级生产力的变化及二者间的关系,以及与年均降水量、年均温、土壤pH值与含水量等因子间的关系。结果表明:草甸草原的物种丰富度与群落生产力显著高于典型草原与荒漠草原(P<0.05)。土壤容重、pH值分别为草甸草原<典型草原<荒漠草原;土壤含水量、有机碳含量分别为草甸草原>典型草原>荒漠草原;草甸草原与典型草原的土壤速效磷含量显著高于荒漠草原(P<0.05)。此外,群落生产力与物种丰富度间存在极显著的正相关(P<0.01),与年均降水量、土壤含水量、有机碳及速效磷含量呈极显著正相关(P<0.01),与年均温、土壤容重、pH值呈极显著负相关(P<0.01)。因此,群落生产力的主要驱动因子为土壤有机碳、含水量及年均降水量,年均温次之,为退化草地恢复提供了理论依据。
Taking three grassland types(i.e.,meadow steppe,typical steppe and desert steppe)as the research objects,the changes of species diversity and community above-ground net primary productivity(ANPP)of different grassland types and their relationship were analyzed,as well as the relationship between community ANPP and the abiotic environmental factors(i.e.,mean annual precipitation,mean annual tem⁃perature,soil pH value,soil water content).The results showed that the species richness and community ANPP of meadow steppes were significantly higher than those of typical steppes and desert steppes(P<0.05).In terms of soil bulk density and pH value,the order was meadow steppes<typical steppes<desert steppes;for soil water content and organic carbon content,the order was meadow steppes>typical steppes>desert steppes.Soil available phosphorus content in meadow and typical steppes was significantly higher than in desert steppes(P<0.05).In addition,community ANPP was positively related to species richness,mean annual precipitation,soil water content,soil organic carbon and available phosphorus content(P<0.01),but negatively correlated with mean annual temperature,soil bulk density and pH value(P<0.01).Overall,the main driving factors of community ANPP were soil organic carbon content,soil water content and annual mean precipitation,followed by annual mean temperature.These research is helpful to provide theoretical basis for the restoration of degraded grassland.
作者
张峰
李邵宇
杨立山
王文琼
郑佳华
乔荠瑢
张彬
赵萌莉
ZHANG Feng;LI Shao-yu;YANG Li-shan;WANG Wen-qiong;ZHENG Jia-hua;QIAO Ji-rong;ZHANG Bin;ZHAO Meng-li(College of Grassland Science,Inner Mongolia Agricultural University,Key Laboratory of Grassland Resources,Ministry of Education of China,Hohhot,Inner Mongolia 010019,China)
出处
《草地学报》
北大核心
2025年第3期902-909,共8页
Acta Agrestia Sinica
基金
内蒙古自治区自然科学基金项目(2024QN03049,2020ZD03)
内蒙古自治区留学回区人员创新创业启动支持计划项目(DC2400002656)
草学一流学科科研专项(YLXKZX-NND-040)
内蒙古农业大学高层次人才引进科研项目(NDYB2023-16)资助。
关键词
内蒙古草原
物种多样性
生产力
生物与非生物因子
Inner Mongolia grassland
Species diversity
Productivity
Biotic and abiotic factor
