华北农牧交错带不同土地利用方式下土壤螨的分布特征

探讨了不同土地利用方式下华北农牧交错带土壤螨的分布特征,结果表明:4种土地利用方式下土壤螨的主要种类为甲螨亚目(Oribatid),螨的密度由大到小为天然草原羊草人工草地苜蓿地玉米地,除玉米地土壤螨密度无明显季节变化外,其他利用方式下土壤螨的数量随植物生育期的延长而增加,其中天然草原、羊草人工草地土壤螨在8~9月有明显的表聚现象,苜蓿地土壤螨有从表层向下层转移的趋势。试验结果说明,螨对不同土地利用方式有显著的不同响应,螨数量和分布的差异与土壤理化性质有密切的关系。

The distribution of soil mites on different land use types in the agro-pasturage ecotone of North China

The distribution characteristics of soil mites was studied under different land use types of agro-pasturage ecotone in North China.The results showed that the dominance soil mites of four land use types was Oribatid mites.Mites individual density tendency was natural pastureleymus chinensis fieldalfalfa fieldaorn field.The number of soil mites on other land use types increased with the extension of plant growth period while corn field had no significantly seasonal variation,in which the soil mites under natural pasture and Leymus chinensis artificial grassland had a clear surface aggregation phenomenon in August and September,soil mites of alfalfa field transferred from the surface to the underlying.Mites had different response to different land use types,differences in quantity and distribution of mites were closely related to soil physico-chemical properties.