陕北枣林土壤动物组成与季节动态

Composition and seasonal dynamics of soil fauna at jujube forest in Northern region of Shaanxi

目的探讨枣林生态系统不同季节对土壤动物群落结构特征的影响,为枣林健康及其害虫生态调控提供基础资料。方法选取延安万花山、延川县、清涧县、佳县4个样点7个样地,分别于2007年3,6,9,11月对陕北枣林土壤动物进行调查,通过手拣方法、干漏斗法和湿漏斗法采集和分离土壤动物。结果获得4 029只土壤动物,属于22目;从枣林不同季节土壤动物群落多样性重要指标来分析,四季的交替对土壤动物群落组成、数量及多样性产生影响。结论陕北枣林土壤动物群落多样性的四季变化为:秋季>夏季>春季>冬季。

Aim To study the impact of different seasons in jujube dynamics of soil fauna, and to provide basic data for jujube health The acquisition of macro-soil-fauna was mainly by hand-sorting. The for separating and extracting meso-micro soil fauna, at 7 plots of forest ecosystems in terms of composition and and ecological regulation of pests. Methods dry funnel 4 sample and wet funnel were separately used points, including Yan＇ an Wanhua Mountain, Yanchuan County, Qingjian County, Jia County, in March, June, September and November in 2007. Results 4 029 soil animals diversity have been identified, which belong to 22 orders. The analysis which is about diversity important indexes of soil fauna in different seasons of jujube forest shows that the succession of four seasons has influence on the composition, quantity and diversity of soil fauna community. Conclusion The seasonal change pattern of diversity of soil fauna groups of jujube forest in Northern area of Shaanxi is ： autumn 〉 summer 〉 spring 〉 winter.