摘要
2011年9月对道孚县灌丛草甸火烧后的植物群落特征与土壤环境进行了调查研究。结果表明,火烧对高寒草甸植物群落有显著的负面作用(P<0.05),灌丛的盖度、高度、株丛数、基围和生物量均显著减少(P<0.05),草本植物群落的盖度、高度和生物量也显著减少(P<0.05);火烧对植物群落地上部分的生长有显著的抑制作用(P<0.05),但有利于草本植物地下根系的生长,且火烧使高寒草甸草本植物群落的丰富度和多样性指数提高。高寒草甸土壤理化性质和土壤微生物的变化表现为:土壤微生物生物量碳、土壤微生物生物量氮、10-20cm土层容重和速效磷明显增加(P<0.05),而土壤pH值和全钾显著下降(P<0.05)。
The plant community characteristics and soil environment of shrub meadow in Daofu which suffered fire were investigated in September 2011.The results showed that fire had significant negative effects on alpine meadow plant community(P<0.05).The coverage,height,number,base circumference and biomass of shrub significantly decreased(P<0.05).The coverage,height and biomass of herbaceous plant community also significantly decreased(P<0.05).There were significant inhibition effects(P<0.05)on the growth of aboveground plant community.However,fire increased alpine meadow herbaceous plant community richness and diversity.In addition,fire was beneficial to the root growth of herbaceous plant.Soil microbial biomass carbon and nitrogen,soil bulk density and available phosphorus in 10-20 cm layer significantly increased(P<0.05),while the soil pH and total potassium significantly decreased(P<0.05).
出处
《草业科学》
CAS
CSCD
北大核心
2014年第11期2034-2041,共8页
Pratacultural Science
基金
国家自然基金项目(31370542)
中央高校基本科研业务费专项资金项目(2014NZYTD01)
关键词
高寒草甸
植物群落
土壤环境
火烧干扰
alpine meadow
plant community
soil environment
fire disturbance
