摘要：The effects of the artificial spraying of seawater on a Quercus acutissirna forest were investigated in order to evaluate the direct use of seawater in the aerial extinction of forest fires. Electric conductivity (EC) and the concentrations of Na+ and in throughfall abruptly rose just following seawater spraying. They decreased gradually and a full recovery required a period of two months. However, the soil EC peaked one week after spraying and gradually decreased in subsequent months. It was suggested that the salinity in the soil did not cause stress to vegetation, even at the peak of soil EC. Evidence of leaf necrosis first appeared two days following spraying and after eleven days was widespread. The measurement of water potentials suggested that leaf necrosis may be a result of the direct influence of salinity on leaves, not from the wilt induced as a result of water stress. The effect of seawater spraying on litter fall, growth of Q. acutissirna (diameter and height) and the yield of Q. acutissirna nuts, was not found to be significant. From our results, we suggest that the growth of Q. acutissirna is not influenced by seawater spraying, when the amount of seawater is less than 16 mm (16 L m-2, 10 min).
