陕北枣林土壤动物与土壤因子关系研究

目的为深入研究枣林土壤动物对土壤质量变化的指示作用提供基础资料和理论依据。方法在陕北枣林研究区域内,以土壤动物和根际土壤为研究对象,采取野外调查取样、定点动态观测与室内实验测试相结合的研究方法。结果陕北枣林土壤动物类群数与土壤因子的相关程度不如密度明显。大型土壤动物类群数及其和中小型土壤动物密度与土壤营养要素相关程度较为密切,而且pH值无论对土壤动物类群数还是密度影响都最明显;土壤含水量对大型土壤动物的类群和中小型土壤动物密度有显著影响;陕北枣林土壤动物与土壤环境要素特征也具有明显的季节性变化。结论生境差异对大型土壤动物群落类群数均具极显著影响,而季节变化仅对中小型土壤动物个体密度具有显著影响。

Soil fauna and soil factors of jujube forest in Northern region of Shaanxi Province

Aim To provide basic data and theoretical basis for further study on the indicative function of soil fauna′s effect on soil quality changes.Methods In the study area of jujube forest in Northern region of Shaanxi Province,a systematic study on the relationship between the soil fauna community characteristics,soil physicochemical factors and seasonal dynamics was done,which took the soil fauna and the rhizosphere soil as the objects of study and was based on the combining research methods of field investigation sampling,fixed point dynamic observation and laboratory experiment tests,the relationship between community structure of soil fauna and soil physicochemical factors has been studied systematically.The seasonal dynamics of soil fauna in jujube forest and soil factors also have been comprehensively analyzed.Results The degree of correlation between number of soil fauna groups of jujube in Northern region of Shaanxi and soil factors is not as clear as that between group number and density.The number and density of macro-soil-fauna groups and the density of meso-micro soil fauna are closely related with the soil nutrition elements;and the influence of pH value either on soil animal group number or density is the most significant.Soil moisture has notable influence on the groups of macro-soil fauna and density of meso-micro soil fauna.The features of soil fauna and soil environment elements have seasonal variation.Conclusion The difference of habitats has extremely remarkable influence on macro-soil-fauna groups and number of groups while the change of season only has impact significantly on the diversity of meso-micro-soil fauna.