蚯蚓密度与土壤化学肥力主要参数之间的定量关系

The quantitative relationships between earthworm density and the major parameters of soil chemical fertility

为研究蚯蚓密度与土壤化学肥力主要参数之间的定量关系,利用数据分析蚯蚓密度与pH值、电导率(EC)、有机质、全氮、碱解氮、全磷、有效磷、全钾、有效钾、有效钙、有效镁及阳离子交换量(CEC)之间的定量关系。结果显示,蚯蚓密度与pH值呈极显著的负相关关系(P<0.001),与有机质、全氮和全磷含量呈极显著的正相关关系(P<0.002),与其他指标的相关性比较弱。研究表明,根据这种关系可以将蚯蚓密度与土壤化学肥力主要指标的定量关系分为5个等级,可为准确地评价蚯蚓对土壤化学肥力的影响提供参考。

In order to investigate the quantitative relationships between earthworm density and the major parameters such as pH,electrical conductivity(EC),organic matter,total nitrogen,alkali nitrogen,total phosphorus,available phosphorus,total potassium,available potassium,available Ca,available Mg and cation exchange capacity(CEC)were analyzed to establish the quantitative relationships between earthworm density and the collected data.It was found that earthworm density was significantly and negatively related with soil pH(P<0.001),while significantly and positively related with organic matter and total nitrogen and phosphorus(P<0.002).There were not significant relationships among earthworm density and other parameters.Five classes could be divided according to the relationships,which may be valuable for estimating the impacts of earthworm on soil chemical fertility.