CHEN Sun-hua.Coupling Relationship between Plant Community Characteristics and Soil Physic-chemical Properties at Different Revegetation Stages on Sloping Lands with Purple Soil in Hengyang of Hu’nan Province, China[J].Research of Soil and Water Conservation,2014,21(05):7-12.
衡阳紫色土丘陵坡地不同植被恢复阶段植物群落特征及其与土壤理化性质的耦合关系
- Title:
- Coupling Relationship between Plant Community Characteristics and Soil Physic-chemical Properties at Different Revegetation Stages on Sloping Lands with Purple Soil in Hengyang of Hu’nan Province, China
- Keywords:
- revegetation; biodiversity; soil physic-chemical factors; purple soil; Hengyang
- 分类号:
- Q948.113;S153.6
- 摘要:
- 采用空间代替时间序列的方法，在野外样方调查和室内实验分析的基础上，分析衡阳紫色土丘陵坡地不同恢复阶段群落物种多样性、土壤理化特征以及二者的耦合关系。结果表明：（1）在整个植被恢复阶段，物种多样性指数存在明显差异，Patrick丰富度指数（R）和Shannon-Wiener多样性指数（H）沿演替中后期（Ⅲ）→演替后期（Ⅳ）→演替中前期（Ⅱ）→演替初期（Ⅰ）的顺序显著减小（P < 0.05），Simpson优势度指数（D）沿Ⅰ→Ⅱ→Ⅳ→Ⅲ的顺序显著减小（P < 0.05），Pielou均匀度指数（E）沿Ⅳ→Ⅲ→Ⅱ→Ⅰ显著减小（P < 0.05）；（2）在植被恢复过程中，0—20 cm土层土壤有机碳（Soil Organic C，SOC）、全氮（Total N，TN）和碱解氮（Available N，AN）显著增加（P < 0.05），土壤容重（Soil Bulk Density，SBD）显著减小（P < 0.05），土壤含水量（Soil Water Content，SWC）变化虽有波动，但总体上升，在20—40 cm土层，土壤理化性质的变化虽在整体上呈现出与0—20 cm土层相同的变化趋势，但改善程度要低于0—20 cm土层，在40—60 cm土层，土壤理化性质的变化并不呈现一定的规律，表明其与植被恢复没有必然的联系；（3）物种多样性指数与土壤理化因子存在一定的相关性，其中0—20 cm土层SOC和TN与物种多样性指数呈显著正相关（P < 0.05），随土层的加深，物种多样性对土壤理化性质的影响表现出减弱的趋势。
- Abstract:
- Based on the survey of community plots and laboratory analysis, we studied the biodiversity, soil physic-chemical properties and their coupling relationship at different revegetation stages by using the spacial series to replace time series. The results showed that: (1) biodiversity index had significant difference at different revegetation stages, Patrick richness index(R) and Shannon-Wiener index(H) significantly decreased in the sequence of succession middle anaphase stage(Ⅲ)→succession anaphase stage(Ⅳ)→succession middle prophase stage(Ⅱ)→succession initial stage(Ⅰ)(P < 0.05), Simpson index(D) significantly decreased in the sequence of Ⅰ→Ⅱ→Ⅳ→Ⅲ(P < 0.05), Pielou evenness index(E) significantly decreased in the order of Ⅳ→Ⅲ→Ⅱ→Ⅰ(P < 0.05); (2) in the 0—20 cm soil layers, SOC(Soil Organic Carbon), TN(Total Nitrogen) and AN(Available Nitrogen) significantly increased but SBD(Soil Bulk Density) significantly decreased with the revegetation succession(P < 0.05), SWC(Soil Water Content) was increasing with a little fluctuation. The changes in 20—40 cm soil layers followed the same rules of 0—20 cm soil layers, but the better degree was lower than that of 0—20 cm soil layers. The change of 40—60 cm soil layers was not followed with some rules, which showed there was no casual link with the succession of revegetation; (3) there were certain correlations between biodiversity index and soil physic-chemical factors, among which SOC and TN were significantly positive correlated with biodiversity index. The effects of biodiversity on the soil physic-chemical properties were weakening with the increase of soil depth.
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备注/Memo
收稿日期:2013-11-22;改回日期:2014-12-16。
基金项目:湖南省重点项目“衡邵盆地生态公益林重点建设区植被恢复研究与示范”（62020608001）；湖南省林业科技创新计划项目“衡阳紫色土丘陵坡地植被恢复研究与示范”（XLK201341）
作者简介:陈孙华(1972-),男,湖南茶陵人,讲师,本科,主要从事林业技术教育与园林的教学与研究工作。E-mail:chensunhua1@sina.com