초록

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본 연구는 인공산성비 처리가 백합나무 묘목의 생장에 미치는 영향을 분석하기 위하여 수행되었다. pH 수준을 5.6, 4.9, 3.9, 2.9로 구분하고 묘목에 처리한 후, 지상부와 지하부의 부위별 건중량, 줄기의 길이생장, 토심별 뿌리생장을 조사하여 인공산성비 처리에 따른 백합나무 묘목의 생장반응을 살펴보고자 하였다. 지상부의 총건중량은 인공산성비 처리와 토양 종류별로 1% 또는 5% 수준에서 유의차가 인정되었으며, 세 가지 토양에서 모두 인공산성비의 산도가 증가함에 따라 지상부의 건중량이 감소하는 경향을 보였다. 지하부의 총건중량은 세 가지 토양에서 모두 인공산성비 처리 간 유의차가 인정되었으며, 토양종류에 대해서는 pH 2.9 처리구에서만 유의차가 있었다. 또한, 토양 A와 토양 C에서 pH 수준이 낮아짐에 따라 지하부 건중량이 감소하는 경향을 보였다. 줄기생장률은 6월-8월까지 인공산성비 처리(p<0.01)와 토양 종류 간(p<0.01 또는 p<0.05) 유의차가 인정되었으며, 세 가지 토양에서 모두 6월에 줄기생장이 큰 폭으로 생장하였다. 또한 pH 3.9 와 pH 4.9 처리구에서는 생장이 오히려 촉진되기도 하였으며, pH 2.9 수준에서는 생장이 억제되었다. 토심 0-7cm와 7-14cm에서의 세근과 미세근량은 pH 수준 간 유의차가 인정되었으나, 토심 14-21cm 에서의 세근량은 pH 수준별 처리에 대한 차이를 보이지 않았다. 또한 토양의 종류는 전반적으로 미세근에 대해서만 통계적 유의차가 나타났다.

Abstract ▼ AI-Helper

This study was conducted to analyze the influence of simulated acid rain on growth of Liliodendron tulipifera seedlings. The seedlings were treated with four levels of simulated acid rain, 5.6, 4.9, 3.9, or 2.9, and dry weight, growth of stem and root were investigated. There were statistically sign...

This study was conducted to analyze the influence of simulated acid rain on growth of Liliodendron tulipifera seedlings. The seedlings were treated with four levels of simulated acid rain, 5.6, 4.9, 3.9, or 2.9, and dry weight, growth of stem and root were investigated. There were statistically significant differences at 1% and 5% in the total dry weight of the above-part among the simulated acid rain treated groups with different levels of pH and different types of soil. The dry weight of the above part tended to decrease as the acidity of the simulated acid rain increases. The total dry weight of the below-part was significantly different according to the levels of acidity of the acid rain in all three soils and was shown a significant difference according to the soil types at only pH 2.9 plot. The dry weight of the below part in soils A and C decreased as the pH level decreases. The rate of stem growth was significantly different among the treatment groups of acidity of the acid rain at significance level of 0.01 and among the treatment groups of soil types at 0.01 and 0.05 levels from June to August. In all three soil types, the greatest stem growth occurred during the period of June. Moreover, stem growth was promoted at pH 3.9 plot and pH 4.9 plot whereas it was suppressed at pH 2.9 plot. Though the amount of fine roots and very fine roots in soil depth of 0-7 cm and 7-14 cm were significantly different among the treatment groups of pH level, fine root was not shown a significant difference among the pH groups in soil depth of 14-21cm. The types of soil significantly affected only on the amount of the very fine root.

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