巢湖湖滨带不同植被类型土壤碳氮磷生态化学计量学特征  

Effect of vegetation type on the eco-stoichiometric characteristics of soils from around Chaohu Lake

作　　者：李培玺 储炳银 滕臻 王亮[1] 孙孟瑶 曹小青 徐小牛[1] LI Peixi;CHU Bingyin;TENG Zhen;WANG Liang;SUN Mengyao;CAO Xiaoqing;XU Xiaoniu(School of Forestry and Landscape Architecture,Anhui Agricultural University,Hefei 230036,Anhui,China;College of Environmental Engineering,Xuzhou University of Technology,Xuzhou 221000,Jiangsu,China)

机构地区：[1]安徽农业大学林学与园林学院,安徽合肥230036 [2]徐州工程学院环境工程学院,江苏徐州221000

出　　处：《草业科学》2020年第8期1448-1457,共10页Pratacultural Science

基　　金：国家自然科学基金项目(31700631、31070588);安徽省自然科学基金(1408085QC69)。

摘　　要：为研究巢湖湖滨带不同植被类型土壤的生态化学计量学特征,以巢湖湖滨带4种不同植被类型:芦苇(Phragmites communis)地、花圃地、荒草地、杨树[Populus euramevicana‘San Martino’(I-72/58)和P.deltoides‘Lux’(I-69/55)]林地为研究对象,分析土壤有机碳(soil organic carbon,SOC)、全氮(total nitrogen,TN)、全磷(total phosphorus,TP)含量及其化学计量学特征。结果表明:0–20 cm土层中,4种植被类型的土壤SOC、TN、TP含量均为花圃地>杨树林地>芦苇地>荒草地,不同植被类型不同土层的SOC、TN、TP含量及其化学计量比差异显著(P<0.05)。不同植被类型土壤SOC、TN、TP之间极显著相关(P<0.01),且土壤C/N较稳定,土壤C/P、N/P受植被类型影响较大,均表现为杨树林地>花圃地>荒草地>芦苇地,表明土壤P成为研究区的养分限制性指标。在巢湖湖滨带不同植被类型土壤中,pH是影响SOC、TN、TP含量以及生态化学计量学特征的主要环境因子。To investigate the effect of vegetation type on the ecological stoichiometric characteristics of wetlands,soil samples were collected from a reed(Phragmites communis)stand,flower field,grassland,and poplar(Populus euramevicana‘San Martino’and P.deltoides‘Lux’)plantation along Chaohu Lake,and the soil organic carbon(SOC),total nitrogen(TN),and total phosphorus(TP)levels of the samples were measured.The SOC,TN,and TP contents of the flower field were highest,whereas those of the grassland were lowest(flower field>poplar plantation>reed stand>grassland),and the SOC,TN,and TP contents,as well as their stoichiometry were significantly affected by vegetation type(P<0.05).Furthermore,soil SOC,TN,and TP were significantly correlated(P<0.01),regardless of vegetation type,and the soil carbon to nitrogen(C/N)ratio was stable,whereas the soil carbon to phosphorus(C/P)and nitrogen to phosphorus(N/P)ratios were affected by vegetation type(poplar plantation>flower field>grassland>reed stand).Therefore,soil P can become the nutrient-limitation indicator in this specific study area.In addition,soil pH was the main environmental determinant of SOC,TN,and TP contents and of the ecological chemometrics of soils around Chaohu Lake.

关 键 词：巢湖 湖滨带 植被类型 土壤SOC 生态化学计量学 

分 类 号：S153.6[农业科学—土壤学]