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当前位置: 首页 > 文章 > 农业土壤生态功能稳定性的影响因素及其相关性分析 山东农业大学学报(自然科学版) 2015 (6) 838-846
Position: Home > Articles > Influence Factors of Ecological Function Stability of Soil and Their Correlation Journal of Shandong Agricultural University(Natural Science Edition) 2015 (6) 838-846

农业土壤生态功能稳定性的影响因素及其相关性分析

作  者：
陈欣瑶;陈楸健;李敏;牛晓丛;周阳;赵乔;张园
单  位：
苏州科技学院环境科学与工程学院
关键词：
土壤性质;土壤生物;抵抗力;恢复力
摘  要：
本文以全国13种不同区域农业土壤为研究对象,通过对CO2呼吸速率、土壤理化性质、香农指数的测定来描述不同土壤类型的生物性抵抗力和恢复力特征,探索影响土壤功能抵抗力和恢复力的关键因子,从而实现土壤质量评价的量化表征。研究表明,在加铜(Cu)胁迫的情况下,不同土壤类型中微生物的抵抗力、恢复力(试验组/控制组的比值f(t))存在先降低后增加的趋势或者呈完全下降的趋势,表明土壤受到铜胁迫后总会出现功能稳定性下降的现象,但对于自身生态系统稳定性好的土壤,会恢复铜胁迫带来的毒性危害。理化性质与生物功能稳定性的关系通过相关性的回归分析得到:p H与抵抗力有正低度相关性,与恢复力和稳定性不相关;CEC与抵抗力之间的关系为正相关;C/N与抵抗力、恢复力、稳定性均为不相关关系;DOC的浓度与抵抗力和恢复力不相关,与稳定性的低度相关;砂粒百分比与土壤对铜胁迫的恢复力呈指数下降关系,指数方程为y=259.42 e-0.022 x,R2=0.6468,表明,砂粒百分比越高,土壤应对铜胁迫所体现的恢复力越弱。香农指数表明,铜胁迫能够减少土壤微生物的种群密度和均匀度,改变微生物群落结构,降低微生物活动,降低生物群落多样性。
译  名：
Influence Factors of Ecological Function Stability of Soil and Their Correlation
作  者：
CHEN Xin-yao;CHEN Qiu-jian;LI Min;NIU Xiao-cong;ZHOU Yang;ZHAO Qiao;ZHANG Yuan;School of Environmental Science and Engineering,Suzhou University of Science and Technology;
关键词：
Soil property;;soil organism;;resistance;;resilience
摘  要：
The research takes 13 kinds of representative agricultural soil samples from the national scale to measure the respiration rate of CO_2 and key physic-chemical parameters and analyze Shannon Index so as to describe the interaction between the properties of different soil types with soil stability to exploit the predominant factors that influence the soil resistance/ resilience/ stability in order to predict soil ability assessment. The results showed that after adding Cu perturbation,the curve of f(t) decreased firstly followed by an increase or completely decreasing, indicating that the soil would be emerging a decline of biological functional stability, but for the soil that have a good ecosystem stability would recover the toxicity caused by Cu perturbation. The relationship between physic-chemical properties and biological functional stability obtained by regression analysis. According to this research, p H have a low correlation with resistance, while irrelevant with the resilience and stability; there is a positive correlation between the CEC and the resistance; C/N and resistance/ resilience/stability were not correlated; the concentration of DOC are uncorrelated with the resistance and resilience, and have a low correlation with stability; the sand percentage had a proportional relationship with the resilience through correlation regression analysis, exponential equation: y=259.42 e-0.022 x, R~2= 0.6468. The Shannon Index indicated that the Cu perturbation decreased the soil microorganisms' abundance and equability by changing the microbial community structure and reducing microbial activity and community diversity.

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