紫茎泽兰入侵对桉树人工林土壤水分的影响

桉树—紫茎泽兰复合系统为近年在云南省出现的一种新生物入侵现象。基于其成因探析、风险评估、演替预测的多重需要,研究了紫茎泽兰入侵对桉树人工林土壤水分的影响。结果显示:紫茎泽兰入侵对桉树人工林土壤水分的影响表现出季节差异,即在干季可显著提高土壤水分含量(重度入侵的阴坡样地除外),在雨季则具有降低土壤水分含量的作用。该研究将为生物入侵条件下桉树人工林的持续经营与科学管理提供基础依据。

Impacts of Invasion of Ageratina Adenophora on Soil Water of Eucalyptus spp. Plantation

Eucalyptus spp.tree- Ageratina adenophora compound system is considered as a new invasion in Yunnan Province in recent years. The impacts of the invasion of AgeratinaAdenophora .adenophora on the soil water of Eucalyptus spp.plantation were explored , based on the exploration of its causes , the assessment of its risk and prediction of its succession. The results showed that the invasion had a different impact on soil water with seasonal difference namely , during the dry season , the soil water concentration increased significantly ( excluding the invaded shadowy slope ), while , in the rainy season , the soil water concentration decreased significantly. This study is expected to provide a theoretical basis for the sustainable operation and scientific management of Eucalyptus spp.plantation under the condition of Ageratinaadenophora invasion.