EFFECTS OF TRANSBOUNDARY AIR POLLUTANTS ON SUCCESSION OF Fagus crenata SHIRAKAMI MOUNTAIN RANGE(WORLD HERITAGE) AND ITS COUNTERMEASURE

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To clarify the effects of O_3 and N load on the growth and net photosynthetic rate of Fagus crenata seedling and the effects of dolomite applied to the soil on the growth and net photosynthetic rate of the seedlings exposed to O_3 and grown under relatively high N loads(50 and 100 kg N ha^<-1> year^<-1>). The N load significantly affected the extent of the negative effects of O_3 on the growth and net photosynthetic rate of the seedling. The application of dolomite to the soil did not recover the O_3 and N load-induced reduction in the growth and net photosynthetic rate of the seedlings.