Effects of simulated acid rain on seedling emergence and growth of five broad-leaved species

Abstract

Seeds and seedlings of five broad-leaved species were separately exposed to simulated acid rain at pH values of 2.0, 3.5, 5.0, and 6.0, or to distilled water (the control). The results showed that seed germination was remarkably inhibited by pH 2.0 treatment for three species. Significant foliar damage, decline in chlorophyll contents, and retardation of the seedlings growth of all the species, were observed at pH 2.0 treatment. The pH 2.0 treatment seemed to be a threshold level for inhibition of seed germination and seedling growth for all the treated species, while seedling was stimulated at pH value between 3.5 and 5.0.

Keywords

Simulated acid rain / Broad-leaved species / Seed germination / Seedling growth

References

[1] Zongwei Hong Influences of acid precipitation upon ecosystem—Studies on acid precipitation in southwestern China, 1993 Beijing: China Science and Technology Press

[2] Lee J., Weber D.E. The effects of simulated acid rain on seedling emergence and growth of eleven woody species Forest Science, 1979, 25(3): 393-398.

[3] Liping Liao, Churong Chen Relationships between simulated acid rain, soil acidification and root growth of Chinese fir andSchima superba (Chinese with an English abstract) Chinese Journal of Ecology, 1992, 11(1): 23-28.

[4] McColl J., Robert G. Effects of simulated acid rain on germination and early growth of Douglas fir and ponderosa pine Plant and Soil, 1983, 74(2): 125-129.

[5] Pitelka L.F., Raynl D.J. Forest decline and acidic deposition Ecology, 1989, 70(1): 2-10.

[6] Shan Yunfeng, Zongwei Hong Hanxi Yang Effects of simulated acid rain on seedlings ofCyclobalano glauca Oerst Acid rain and agriculture, 1989 Beijing: China Forestry Press 174-178.

[7] Shriner, D.S. 1976. Effects of simulated rain acidified with sulfuric acid on host-parasite interactions. In: L. S. Dochinger and T. A. Seliga (Eds.), 1st Internat. Symp. Acid Precipitation and the Forest Ecosystem. U.S.D.A. Forest Service, Gen. Tech. Rep. No. NE-23, Upper Darby, Pennsylvania, 919–926.

[8] Smith W.H. Air pollution and forests: Interactions between air contaminants and forest ecosystems, 1981 New York: Springer-Veralg

[9] Tamm, C.O., Wiklander, G. and Popovic, B. 1976. Effects of application of sulphuric acid to poor pine forests. In: L. S. Dochinger and T. A. Seliga (Eds.), Ist Internat. Symp. Acid Precipitation and the Forest Ecosystem. U.S.D.A. Forest Service, Gen. Tech. Rep. No. NE-23, Upper Darby, Pennsylvania, 1011–1024.

[10] Wood, T. and Bormann, F.H. 1976. Short-term effects of a simulated acid rain upon the growth and nutrient relations ofPinus strobus L. In: Dochinger, L.S. and T.A. Seliga (Eds.), Ist Internat. Symp. Acid Precipitation and the Forest Ecosystem. U.S.D.A. Forest Service, Gen. Tech. Rep. No. NE-23, Upper Darby, Pennsylvania, 815–826.

[11] Wood T., Bormann F.H. The effects of an artificial acid mist upon the growth ofBetula alleghaniensis Britt. Environ. Pollut., 1974, 7(3): 259-268.

[12] Fukang Xu, Jiming Hao A review on the present situation of acid rain in China and establishment of countermeasures Environmental Science, 1990, 11(1): 61-66.

[13] Hanxi Yang Acid rain and agriculture, 1989 Beijing: China Forestry Press