摘要
在室内条件下通过不同pH模拟酸雨(pH 2,3,4,设纯水对照)淋洗土柱试验研究模拟酸雨对重庆地区主要土壤的淋溶影响。结果表明,ca^(2+)、Mg^(2+)离子的淋失同降雨酸度呈负相关,但K^+的淋失则同降雨酸度无明显关系。pH4酸性降雨对四种供试土壤无明显影响。除石灰性土壤外,pH2强酸雨能使酸性和中性土壤迅速酸化。pH<3的降雨增加了酸性和中性土壤中离子态铝的活性,但如果向土壤中施用碳酸钙可减少活性铝溶出量30—90％。
The effect of simulative acid rain on main kinds of soils from Chongqing District were investigated by leaching soil columns with the acid rain (pH2, 3,4)and pure water as a check experiment in laborary. The rewere native correlation between the loss of Ca^(2+) or Mg^(2+) and rain's acidity. Acid rain gave a little effect on K^+. The acid rain (PH≥4) made no impact on the soils, and the acid or the neutral soils were strongly sensitive to acid rain (pH2) except the calcarious soil. When The acid or neutral soils were exposed to simulative acid rain (ph<3), the action of ionic Al could increased. However, if calcium was applied in the soils 30-90% of amount of ionic Al leached would be decreased.
出处
《农业环境保护》
CSCD
1989年第4期19-23,共5页
Agro-Environmental Protection
