摘要
本研究采用野外样方调查和室内分析相结合的方法,分析了黄土高原典型草原冬季火烧区和未火烧区植物群落的物种组成、功能群组成、物种多样性、地上生物量,以及土壤有机碳和全氮。结果表明:冬季火烧显著降低了多年生禾草的重要值,而提高了多年生杂类草的重要值,而对一、二年生草本和灌木、半灌木功能群的重要值影响不显著。冬季火烧显著提高了灌木、半灌木在群落中的比例,并且降低了一、二年生草本的比例,但对多年生禾草和多年生杂类草的比例影响不显著。灌木、半灌木功能群的丰富度指数在火烧地显著大于未火烧地,而一、二年生草本的丰富度指数显著小于未火烧地。冬季火烧显著降低多年生禾草功能群的生物量和显著提高多年生杂类草功能群的生物量。火烧草地的土壤有机碳和全氮含量在0~10cm土层中均显著高于未火烧草地。
Difference in the species composition,functional group composition,species diversity,aboveground biomass,soil organic carbon and soil total nitrogen of the plant communities between the burnt and unburned areas in the typical steppe on the Loess Plateau was analyzed.As a result of the analysis,winter fire significantly decreased the importance value of perennial grasses,significantly increased the importance value of perennial forbs,and had no effect on the importance value of annual-biennial herbs and shrubssubshrubs.For the species composition of the functional groups,winter fire significantly increased the percentage of shrubs-subshrubs,decreased the percentage of annual-biennial herbs,and did not significantly affect the percentage of perennial forbs and perennial grasses.The species richness of annual-biennial herbs significantly decreased and shrubs-subshrubs significantly increased in burnt grasslands compared with unburned grasslands.Winter fire significantly decreased the aboveground biomass of perennial grasses and increased the aboveground biomass of perennial forbs.Soil organic carbon and soil total nitrogen in 0-10 cm soil layer were both significant higher in the burnt grasslands than that in the unburnt grasslands.
作者
赵凌平
魏楠
谭世图
何晴波
王占彬
樊文娜
孙平
ZHAO Ling ping;WEI Nan;TAN Shi tu;HE Qing bo;WANG Zhan bin;FAN Wen na;SUN Ping(College of Animal Science and Technology,IIenan University of Science and Technology,Luoyang,IIenan Province 471003,China;Forage Resources Exploration and Animal IIealth Cultivation Academician Workstation of IIenan province,Luoyang,IIenan Province 471023,China)
出处
《草地学报》
CAS
CSCD
北大核心
2018年第3期576-583,共8页
Acta Agrestia Sinica
基金
国家自然科学青年基金项目(31302013)
国家科技支撑计划(2014BAC05B04)
河南省教育厅科学技术研究重点项目(13A2302812013)
河南科技大学博士启动基金项目(09001634)资助
关键词
冬季火烧
功能群特征
地上生物量
土壤有机碳
土壤全氮
Winter fire
Functional groups characteristics
Above ground biomass
Soil organic carbon
Soil total nitrogen
