降尘和酸雨对土壤蔬菜系统影响的研究

土壤蔬菜系统常受到降尘和酸雨的交替污染。但不同的土壤蔬菜系统对大气降尘的酸雨的反应不同。酸雨和降尘的复合污染比单因子污染的危害更大。本文通过模拟重庆市酸雨和降尘，研究了以上生态环境效应及其产生的原因。

EFFECTS OF DUST AND ACID RAIN ON SOIL-VEGETABLE SYSTEM

Two soils(acid and calcareous purple soil)and tomato were used in potexperiements,which were four treatments of chech,dust(33.5g/m2 month),simulatedpH4.0 acid rain, dust combine acid rain, and six or eight repeated for calcareouspurple soil and acid purple soil, respectively. The results suggested that singleacid rain or dust treatment has no harm to the yield of tomato, and that in calca-reous purple soil,the yield of tomato was decreased about 18% by acid rain com-bination with dust,and that in acid purple soil combined pollution could dep-ress positive effect of dust.On the other hand,the tomato fruit quality was poorby acid rain combinded with dust,and the qualities of tomato growth in acid purplesoil are worse than those of tomato growth in calcareous purple soil.