酸雨对鼎湖山土壤的累积效应及荷木的反应

The cumulative effects of acid rain on the soil and responses of Schima superba at Dinghushan

运用盆栽实验研究了酸雨对鼎湖山季风常绿阔叶林土壤危害的累积效应和优势树种荷木的一些生理反应.结果表明,在酸雨直接淋洗土壤的条件下,与对照相比,土壤酸度,土壤淋洗液酸度增加;土壤交换性K+、Na+上升,Ca2+、Mg2+和有效Mn、Zn下降;土壤淋洗液中K、Na含量下降,Ca、Mg、Cu、Fe、Mn和Al在pH3.05的酸雨处理下含量显著上升;但生长于模拟酸雨土壤中的荷木在土壤化学性质发生变化后仍能健康生长.

Using potted plants test the cumulative effects of acid rain on the soil damage and some physiologicalresponses of Schima superba which dominates monsoon evergreen broad-leaved forest at Dinghushan. The results showedthat compared with the control, the acidity of soil and soil drip-washing liquor, the contents of soil exchangeable K+ and Na+ increased; the contents of soil exchangeable Ca2+ and Mg2+, the contents of soil available Mn and Zn, and theconcentrations of K and Na in soil drip-washing liquor decreased; after the soil was treated by acid rain of pH 3.05, the concentration of Ca、Mg、Cu、Fe、Mn and Al in soil drip-washing liquor all increased markedly; but Schima superba in the simulated acid rain soil could grow healthily after the change of soil chemical properties.