Possible emissions of N₂O from plants in coniferous-deciduous mixed forests

Abstract

Aboveground vertical profiles of N₂O concentrations were measured within two natural coniferous-deciduous mixed forests of 1998 and 1999 in Changbal Mountain. Significant high N₂O concentrations were found in six profiles out of twelve profiles. The results showed that high concentrations were 3.03% to 64.9% higher than the “normal concentrations” in these six profiles. Differences between the high concentrations and the “normal concentrations” were statistically significant. The simultaneous occurrence of high concentrations at/nearby the canopy height and normal concentrations at the trunk space height indicated an efflux of N₂O from portant source of atmospheric N₂O in a forest ecosystem.

Keywords

Nitrous oxide / Concentration profile / Plant / Forest ecosystem / S718.51 / A

References

[1] Bouwman A. F. Bouwman A. F. Exchange of greenhouse gases between terrestrial ecosystems and the atmosphere Soils and the Greenhouse Effect, 1990 Chichester: Wiley 61-127.

[2] Castro M.S. et al. Exchange of nitrous oxide and methane between the atmosphere and soils in spruce-fir forests in the northeastern United States [J]. Biogeochemistry, 1993, 18(3): 119-135.

[3] Chang C. et al. Nitrous oxide emission through plants [J]. Soil SCI. SOC. AM. J., 1998, 62: 35-38.

[4] Guanxiong Chen et al. Investigation on emission of N₂O by plant [J]. Chin. J. Appl. Ecol., 1990, 1(1): 94-96.

[5] Xin Chen et al. A preliminary research on the effect of nitrogen and phosphorus supply on N₂O emission by crops [J]. Chin. J. Appl. Ecol., 1995, 6(1): 104-105.

[6] Grundmann G.L., Lensi R., Chalamet A. Delayed NH₃ and N₂O uptake by maize leaves [J]. New Phytol, 1993, 124: 259-263.

[7] Guohong Huang et al. Investigation on emission of N₂O by aseptic soybean plant [J]. Acta Botanica Sinica, 1992, 34(1): 835-839.

[8] IPCC. 1995. Summary for Policymakers: The Science of Climate Change-IPCC Working Group I.

[9] Kim K.-R., Craig H. Nitrogen-15 and oxygen-18 characteristics of nitrous oxide: a global perspectives [J]. Sciences, 1993, 262: 1855-1857.

[10] Kreileman G.J.J., Bouwman A.F. Computing land use emissions of greenhouse gases [J]. Water, Air and Soil Pollution, 1994, 76: 231-258.

[11] Lensi R., Chalamet A. Absorption of nitrous oxide by shoots of maize Plant Scil., 1981, 59: 91-98.

[12] Sihe Yang et al. N₂O emission from woody plants and its relation to their physiological activities [J]. Chin. J. Appl. Ecol., 1995, 6(4): 337-340.