高寒地区马蔺地下生物量与土壤紧实度的关系

Relationshipbetween underground biomass of Iris lacteaand soil compaction in alpine area

以高寒地区马蔺为研究对象,测定了不同土层内马蔺根系的地下生物量与土壤紧实度的关系。结果表明,土壤紧实度与地下生物量的变化趋势呈负相关关系,随土层深度的增加,紧实度逐渐增大,而地下生物量逐渐减少。0~5cm表层土壤紧实度最低,地下生物量最高;45~50cm底层土壤紧实度最大,植物地下生物量最少。与马蔺根部相同水平距离处不同土层间土壤紧实度呈显著的相关关系,而同一土层距马蔺根部不同水平距离之间土壤紧实度地下生物量之间的相关性不明显。

The paper studied the relationship between underground biomass of Iris lactea in different soil depth with soil compaction in alpine region.The results showed that there was a negtive correlation between soil compaction with underground biomass of Iris lactea.With the soil depth increasing,the soil compaction was increasing and the underground biomass was decreasing.The soil compaction in 0~5cm was lowest while the undergound biomass was highest.The soil compaction in 45~50cm was highest while the underground biomass was lowest.