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한국생태학회 / v.21, no.1, 1998년, pp.65-72 
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산성비가 전동싸리의 생장과 질소 고정 활성에 미치는 영향
( Effect of Simulated Acid Rain on the Growth and Nitrogen fixation of melilotus suaveolens ) |
| 송승달;서봉보;박재홍;박태규;정화숙;송종석;노광수;김인선; 경북대학교 자연과학대학 생물학과;경북대학교 자연과학대학 생물학과;경북대학교 자연과학대학 생물학과;경북대학교 자연과학대학 생물학과;경북대학교 사범대학 생물교육과;안동대학교 자연과학대학 생물학과;계명대학교 자연과학대학 생물학과;계명대학교 자연과학대학 생물학과;
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| 초 록 |
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| Various effects of simulated acid rain by $HNO_3$ and $H_2SO_4$ with pH 3.2, 4.2 and 5.6 were investigated in Melilotus suaveolens Ledeb, a biennial legume dominating the disturbed and poor soil vegetations. The nitric acid treatment of pH 3.2 resulted in 121% increase of the plant height compared to that of pH 5.6 during early growth, although 17% decrease was detected with the sulfuric acids. During 14 days of treatment, leaf biomass and chlorophyll content increased 168% and 133% with pH 3.2 nitric acid rain but decreased 20% and 38%, respectively, with sulfuric acid rain. Nitrogen content in various organs was also determined after 42 days of nitric acid treatment. It increased 480% and 387% by pH 3.2 and 4.2 in leaves, 212% and 214% in stems and 247% and 249% in roots. However, the same treatment with the sulfuric acid showed a considerable reduction in this content, indicating that the nitric acid was a nitrogen source. Nodule formation assayed revealed 15% decrease with pH 3.2 in contrast to 157% increase in pH 4.2, further suggesting an enhancement effect by the additional nitrogen source. Contrary to this, the nodule formation was reduced up to 43-71% by sulfuric acid rains. Specific nitrogen fixation activities of nodules estimated at pH 3.2, 4.2 and 5.6 nitric acid rain were 36.7, 42.8 and 47.3 ${mu}mol;C_2H_4{cdot}g^{-1};fw;nodule{cdot}h^{-1}$, while those of sulfuric acid rain exhibited 1 nmol $C_2H_4{cdot}plant^{-1}{cdot}h^{-1}$ with pH 3.2, 177 with pH 4.2 and 179 with pH 5.6, yet it increased 2, 115 and 286 respectively corresponding to the three sulfuric acid concentrations. Further implications of the simulated acied rain were also discussed in the study. |
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| 키워드 |
| Simulated acid rain;HNO3;H2SO4+;Melilotus suavelens;Growth;Nitrogen fixation; |
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The Korean Journal of Ecology / v.21, no.1, 1998년, pp.65-72
한국생태학회
ISSN : 1225-0317
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811919962963)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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