衡阳紫色土丘陵坡地植被不同恢复阶段土壤理化特征分析  

Analysis on Soil Physio-chemical Characteristics in Different Restoration Stages on Sloping-land with Purple Soils in Hengyang

作　　者：杨宁[1,2] 邹冬生[2] 杨满元[3] 陈盛彬[1] 陈志阳[1] 林仲桂[1] 

机构地区：[1]湖南环境生物职业技术学院园林学院,湖南衡阳421005 [2]湖南农业大学生科院,湖南长沙410128 [3]湖南环境生物职业技术学院实训中心,湖南衡阳421005

出　　处：《农业现代化研究》2012年第6期757-761,共5页Research of Agricultural Modernization

基　　金：湖南省重点项目(编号:62020608001);湖南省科技厅项目(编号:S2006N332);湖南环境生物职业技术学院院长科研基金青年资助项目(编号:Z09-01)

摘　　要：以典型衡阳紫色土丘陵坡地植被不同恢复阶段为研究对象,采用空间代替时间序列方法,选用立地条件基本一致的裸荒地、草地、灌木林和森林基本相似的4个植被恢复阶段,通过调查取样和实验分析,探索了衡阳紫色土丘陵坡地不同恢复阶段以及同一恢复阶段不同层次上土壤理化特征的时空变化,与不同植被恢复阶段的植被类型和土壤理化特性变化的内在联系及其互作效应。结果表明随着植被恢复演替的进行,土壤各层黏粒含量增加显著(p<0.01或p<0.05),但随土壤深度的增加,呈递减趋势,具体表现为表层>亚表层>下层;土壤容重减小明显(p<0.05),随土壤深度而呈递增趋势,具体表现为表层<亚表层<下层;土壤有机质逐渐增加(p>0.05),随土壤深度的增加呈递减趋势,表现出明显的表聚性;土壤全氮、速效磷和速效钾含量均呈上升趋势,由于植物根系及枯落物多少的差异,使得各营养成分的垂直分布各异;主成分揭示出土壤理化特征可作为评价植被改善土地质量的标准。这将丰富该地区植物生态学与恢复生态学的内容,为衡阳紫色土丘陵坡地生态系统的恢复与重建提供了重要依据。In 2010-2011, different restoration stages of typical vegetation on the sloping-land with purple soils in Hengyang were selected as the study objects. By using the space series to replace time series, choosing four typical sample stages with similar site conditions： the bare land （ I ）, herbaceous community（ II ）, shrubby community（III） and arboreal community （IV）, this study aimed to explore the relationship and inter-effects of plant community in different restoration stages with the soil physio-chemical characteristics change, we studied the soil physio-chemical characteristics spatial change in different restoration stages and different soil layer in the same restoration stages. The results showed that： with vegetation restoration succession process, the soil clay contents increased significantly（p〈0.01 or p〈0.05）, of which decreased with the increase of the soil depth, presenting： surface 〉sub-surface 〉lower surface; the soil bulk density decreased significantly with the increase of soil depth（p 〈 0.05 ）, presenting： surface 〈 sub-surface 〈 lower surface; the SOM increased with the vegetation restoration process （p〉0.05）, but the contents were decreasing with the increase in soil depth, which showed a clear table cohesion; due to the differences of plant root distributions and litter amount in the different soil layers, the soil TN, AP and AK increased, principal component analysis showed soil physio-chemical characteristics can be an index to evaluate vegetation restoration process and soil quality. This study to some degree enriched and broadened the vegetation ecology and restoration ecology of this area and provide important theoretical basis for ecosystem restoration and reconstruction in sloping-land with purple soils in Hengyang.

关 键 词：土壤理化特征 不同恢复阶段 紫色土 衡阳 

分 类 号：X171.1[环境科学与工程—环境科学] S153[农业科学—土壤学]