衡阳紫色土丘陵坡地不同恢复阶段植被特征与土壤性质的关系  

Relationships between vegetation characteristics and soil properties at different restoration stages on slope land with purple soils in Hengyang of Hunan Province,South-central China

作　　者：杨宁[1,2] 邹冬生[2] 杨满元[3] 胡利珍[1] 邹芳平[1] 宋光桃[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]湖南农业大学生物科学技术学院,长沙410128 [3]湖南环境生物职业技术学院实验实训中心,湖南衡阳421005

出　　处：《应用生态学报》2013年第1期90-96,共7页Chinese Journal of Applied Ecology

基　　金：湖南省科技厅项目(S2006N332);湖南省教育厅科学研究项目(12C1057);湖南省普通高校青年骨干教师培养对象资助项目;湖南环境生物职业技术学院南岳学者基金项目(湘环职院[2012]4号)资助

摘　　要：采用空间代替时间序列的方法,对衡阳紫色土丘陵坡地不同恢复阶段植被特征与土壤性质的关系进行研究.结果表明:不同植被恢复阶段土壤理化特征存在明显差异,从草坡、灌草、灌丛到乔灌恢复阶段,0～40cm土层土壤有机质、全氮、速效氮和土壤含水量显著增加,土壤容重显著减小,土壤全磷和速效磷变化不明显,土壤pH逐渐减小,但不同恢复阶段间差异不显著.不同恢复阶段植物群落生物量影响土壤微生物数量和组成,细菌和真菌数量与植物群落地上生物量呈显著正相关,放线菌数量与地上生物量相关性不显著;在各恢复阶段,土壤脲酶、蛋白酶、磷酸酶、蔗糖酶、纤维素酶、过氧化氢酶和多酚氧化酶的活性随着土层的加深而逐渐减弱,并与植物群落丰富度和地上生物量呈显著正相关.By using space series to replace time series, this paper studied the relationships between the vegetation characteristics and soil properties at different restoration stages on the slope land with purple soils in Hengyang of Hunnan Province South-central China. There existed obvious differences in the soil physical and chemical properties at different restoration stages. From grassplot, grassshrub, shrub to shrub-arbor, the soil organic matter, total and available N, and moisture contents increased markedly, soil bulk density had an obvious decrease, soil total and available P contents changed little, and soil pH decreased gradually, but no significant differences were observed among different restoration stages. At different restoration stages, the biomass of plant community had effects on the quantity and composition of soil microbes. The quantities of soil bacteria and fungi had significant positive correlations with the aboveground biomass of plant community, but the quantity of soil actinomycetes had less correlation with plant community＇ s aboveground biomass. At different restoration stages, the activities of soil urease, protease, alkaline phosphatase, invertase, cellulase, catalase, and polyphenol oxidase decreased with increasing soil layer, and had significant positive correlations with plant community＇ s richness and aboveground biomass.

关 键 词：物种多样性 土壤微生物 土壤酶活性 植被恢复 紫色土 

分 类 号：X171[环境科学与工程—环境科学]