摘要
为探究陇中温性草原不同草地型植被特征和土壤理化性质之间关系,明确形成不同草地型的关键土壤因子。本研究以陇中温性草原为研究对象,分析了3种草地型(针茅型,冰草、杂类草型和长芒草、杂类草型)的植被特征和土壤理化性质及两者互馈关系。结果表明:不同草地型土壤理化性质与植被特征差异显著(P<0.05),长芒草、杂类草型草地较其他型草地具有较高的植被盖度、草层高度、地上生物量、土壤含水量、有机质、全碳、全钾、全氮,及较低的土壤容重、pH值、电导率和全磷含量;长芒草、杂类草型草地土壤有机质含量随土层深度加深,呈先降低后增加趋势,低峰出现在10~20 cm土层;土壤含水量和有机质含量与不同草地型植被特征之间呈显著正相关关系(P<0.01)。综上所述,土壤含水量和有机质含量是影响陇中地区温性草原不同草地型草地植物生长的关键因素。
In order to investigate the relationship between vegetation characteristics and soil physicochemical properties of different grassland types and clarify the key soil factors of the formation of different grassland types,In this study,we took temperate steppes in Longzhong as the research object and analyzed the vegetation characteristics and soil physicochemical properties of three grassland types(Stipa capillata type,Agropyron cristatum-Herbarum variorum type and Stipa bungeana-Herbarum variorum type)and their mutual relationship.The results showed that there were significant differences in soil physicochemical properties and vegetation characteristics among different grassland types(P<0.05).Compared with other grassland types,Stipa bungeana-Herbarum variorum type had higher vegetation cover,grass layer height,above-ground biomass,soil moisture content,organic matter,total carbon,total potassium and total nitrogen,but lower soil bulk density,pH value,electrical conductivity and total phosphorus content.The soil organic matter of Stipa bungeana-Herbarum variorum type showed a trend of decreasing first and then increasing with the deepening of the soil layer,with the lowest peak occurring in the 10~20 cm soil layer.Soil moisture content and organic matter content were significantly positively correlated with vegetation characteristics of different grassland types(P<0.01).In conclusion,soil moisture content and organic matter content were key factors affecting the growth of grass plants in different grassland types of temperate steppe in the Longzhong region.
作者
李娅丽
柳小妮
张德罡
何国兴
徐贺光
纪童
姜佳昌
LI Ya-li;LIU Xiao-ni;ZHANG De-gang;HE Guo-xing;XU He-guang;JI Tong;JIANG Jia-chang(College of Pratacultural Science,Gansu Agricultural University,Lanzhou,Gansu Province 730070,China;Key Laboratory of Grassland Ecosystem,Ministry of Education(Gansu Agricultural University),Lanzhou,Gansu Province 730070,China;Pratacultural Engineering Laboratory of Gansu Province,Lanzhou,Gansu Province 730070,China;China-US Center for Grazing Land Ecosystem Sustainability,Lanzhou,Gansu Province 730070,China;Grassland Technique Extension Station of Gansu Province,Lanzhou,Gansu Province 730000,China)
出处
《草地学报》
CAS
CSCD
北大核心
2023年第11期3405-3414,共10页
Acta Agrestia Sinica
基金
甘肃省草原监测评价(GSZYTC-ZCJC-21010)
2021年自列省级林业和草原科技项目-河西荒漠区草地土壤碳密度空间分布及碳储量估算(2021kj071)
甘肃省新一轮草原补奖效益评估及草原生态评价研究(XZ20191225)项目资助。
关键词
温性草原
草地型
植被特征
理化性质
Temperate steppe
Grassland type
Vegetation characteristics
Physicochemical property
作者简介
李娅丽(1998-),女,汉族,甘肃泾川人,硕士研究生,主要从事草地资源与生态研究,E-mail:2549655400@qq.com;通信作者:柳小妮,E-mail:Liuxn@gsau.edu.cn。
