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인공산성우가 (人工酸性雨) 은행나무 Ginkgo biloba L . 유묘의 (幼苗) 생장 , 생리적 특성 및 토양의 화학적 성질에 미치는 영향 - Ⅲ. 토양의 화학적 성질에 미치는 영향 -
Effects of Simulated Acid Rain on Growth and Physiological Characteristics of Ginkgo biloba L . Seedlings and on Chemical Properties of the Tested Soil - Ⅲ. Effects on Chemical Properties of the Tested Soil -
김갑태 , 이돈구 ( Gab Tae Kim , Don Koo Lee )
UCI I410-ECN-0102-2008-520-002104193

One-year-old seedlings of Ginkgo biloba were treated with various simulated acid rains(pH 2.0, pH 3.0, pH 9.0 and pH 5.0) to examine the effects of simulated acid rain on the chemical properties of the tested soil. The seedlings were grown in a pot(4500㎤)containing one of three different soils(nursery soil, mixed soil and sandy soil). Simulated acid rain was made by diluting sulfuric and nitric acid solution(H¹SO⁴: HNO³=3 : 1, V/V) with tap water and tap water(pH 6.4), and treated by 5mm each time for three minutes during the growing seasons(April to October 1985). Acid rain treatments were done three times per week to potted seedlings by spraying the solutions. The chemical properties of potting media were compared among three soil types as well as among the various pH levels. The results obtained in this study were as follows : 1. Exchangeable calcium and magnesium contents and base saturation of the soil decreased with decreasing pH levels of acid rain, and their decreasing rates were as follows : sandy soil was the highest, followed by mixed and nursery soils, However, exchangeable aluminum content rather increased as the pH levels decreased. 2. Available phosphate in the soil decreased as the pH levels of acid rain decreased. Its content increased in nursery soil, compared with those before acid gain treatment, Gut decreased in mined and sandy soils. 3. Soil sulfate and nitrate contents increased remarkably as the pH levels decreased, and the only significant difference in the sulfate was found among the pH levels. Soil sulfate content was the highest in nursery soil, followed by mixed and sandy soils.

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