纳板河流域不同经济林地土壤生态化学计量变化特征研究  

Research on Soil Ecological Stoichiometry Characteristics of Different Economic Forest Lands in Naban River Watershed

作　　者：肖冬冬 尚海龙[1] 王连晓 XIAO Dongdong;SHANG Hailong;WANG Lianxiao(Kaili University,Kaili Guizhou 556011,China;West Yunan University of Applied Sciences,Dali Yunan 671006,China)

机构地区：[1]凯里学院,贵州凯里556011 [2]滇西应用技术大学,云南大理671006

出　　处：《林业资源管理》2020年第4期74-79,共6页Forest Resources Management

基　　金：贵州省教育厅青年科技人才成长项目(KY2017336)。

摘　　要：为了研究西双版纳纳板河流域原始林转变为经济林地后,土壤的生态化学计量变化特征,在纳板河流域以5种不同经济林地(茶树林、甘蔗地、橡胶林、火龙果地和香蕉地)以及作为参考的原始林土壤作为研究对象,对土壤垂直方向上的碳氮磷养分含量及其比例的影响状况等进行研究,探讨土壤的养分变化和化学计量特征。研究结果表明:土壤碳(C)、氮(N)和磷(P)含量均不同程度表现出随土层深度增加而降低的趋势,6种不同林型中原始林和多年生橡胶林因较少受到人为活动扰动,表现出较低C,N和P含量;不同林型土壤中C∶N呈现出表层和下层低,中间层高的纺锤式分布类型;不同林型土壤中火龙果地土壤C∶P最低,而甘蔗地和香蕉地土壤中C∶P较高;原始林和橡胶林呈现低N∶P比值,而甘蔗地呈现出较高N∶P比值。相关性分析表明:C,N,P以及N∶P之间呈现出极显著正相关关系(P<0.01);C∶N和N,P之间关系显著(P<0.05);C与C∶P之间相关性极显著(P<0.01),与N∶P之间相关性显著(P<0.05)。In the Naban River watershed,five different economic forest lands(tea groves,sugarcane lands,rubber groves,pitaya lands and banana lands)and primary forest soils that are used as reference were taken as research objects to explore the characteristics of soil eco-stoichiometry after the primary forest in Naban River watershed in Xishuangbanna was converted into economic forest land.This article will study the soil nutrient changes and stoichiometric characteristics.The results show that the contents of soil organic C,N and P are inclined to decrease with increasing soil depth.The primary forests and perennial rubber forests of six different forest types that are less disturbed by human activities contain relatively lower C,N and P.The C/N in soils in different forest types presents a spindle-type distribution with little contents in the surface and substratum while more in the middle;the C/P of pitaya land is the lowest among different forest types,while the C/P of sugarcane and banana soils is relatively high;primary forest and rubber forest present a low N/P ratio,while sugarcane field presents a higher N/P ratio.Correlation analysis shows that there is a very significant positive correlation between N,P,organic C and N/P(P<0.01).The C/N,N and P is significantly correlative(P<0.05);the correlation between C and C/P is significant(P<0.01),and the correlation between N/P is significant(P<0.05).

关 键 词：不同经济林地 土壤养分 生态化学计量特征 

分 类 号：P934[天文地球—自然地理学] S718.516[农业科学—林学]