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| 인공산성우의 엽내 엽록소 함량에 대한 영향 Effects of Acid Rain on the Chlorophyll Contents |
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| 글쓴이 : 관리자
날짜 : 08-06-14 15:19
조회 : 10654
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인공산성우가 잣나무 및 쥐똥나무 유묘의 엽내 엽록소 함량에 미치는 영향 Effects of Simulated Acid Rain on the Chlorophyll Contents in the Needles of Pinus koraiensis and Ligustrum obtusifolium Seedlings <한국임학회지 76(1):11-16 Jour. Kor. For. Soc. 76(1):11-16 1987> Corresponding author Yong-Moon Cheong yncheong@kongju.ac.kr
잣나무 유묘와 쥐똥나무 삽목묘를 인공산성우로 처리하고 엽내 엽녹소 a와 b의 함양을 분석하여 양인 증감에 따른 산도 수준의 영향을 논의하였다. 처리된 시험수종은 1985년 봄에 폿트에 재배되고 해당지역의 30년 간의 강우양식을 모의해서 산성우(pH 6.5, 4.0 및 2.0)를 5월부터 8월까지 4개월간에 걸쳐 살포하고, 동년 9월 18일l 성숙된 잎을 채취하여 엽중의 엽록소를 분석하였다. 분석 결과에 의하면, 두 수종 공통적으로 산성우의 농도가 강해짐에 따라 엽록소 a와 b의 함양은 감소하는 경향을 보였고, 엽록소 a에 있어서는 감소 경향이 통계적으로 유의했고, 엽록소 b의 경우는 유의하지 않았으나 감소 경향이 있는 것으로 볼 일 수 있었다. 산성우 pH 수준에 따른 엽록소 a와 b에 대한 감소 효과 차리에 있어서는 두 수종 모두 pH 수준별로 감소 지수가 유사하였으며, 따라서 엽록소 a 대 b의 함량비는 산성우의 pH 수준 여하에 부구하고 일정한 값을 유지하고 있었다.
With the purpose of pursuing the increase and decrease of chlorophyll a and chlorophyll b caused by application of the simulated acid rain treatment on Pinus koraiensis and Ligustrum obtusifolium cuttings, the experimental design of randomized block arrangement with three replications was implemented in the experimental field of Yesan National Agricultural Junior College, during the growing season of 1985. Pinus koraiensis seeds stratified in cool and moist condition were sown on pots, and in case of Ligustrum obtusifolium C1/ 1 cuttings were potted for experimental use in the early spring. The regime of artificial acid rain, based upon precipitation frequency and density, was simulated from the learning of climatological data averaged from 30 years records. The spray of acid water containing pH values of 4.0 and 2.0 was initiated from the 1st of May and ended on the 31st of August. As control, ground water was also treated at the same time. To analyse the chlorophyll content, those leaves looking representative and unaffected by other harmful agents were sampled on the 18th of September, and UV-visible spectrophotometer was used. With decrease in pH values of acid rain, the content of chlorophyll a and chlorophyll b decreased in both species. The decrease in chlorophyll a could be confirmed through statistical significance, but not in chlorophyll b. When we discussed the chlorophyll decrease index was explained in detail in the paper, an attention might be given to similarity decreasing values in both chlorophyll a and chlorophyll b, according as pH levels of acid rain decreased. The ratios of chlorophyll a to chlorophyll b in both species were not affected by different pH levels of acid rain.
Key words: acid rain, chlorophyll content, Pinus koraiensis, Ligustrum obtusifolium
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