论文部分内容阅读
对1998 年春季庐山森林生态系统中降水、透冠水、茎流水、土壤渗漏水和沟水的水溶态氮(NH+4 -N、NO-3 -N、NO-2 -N) 进行了观测和分析研究。结果表明, 庐山酸雨pH值较1993年升高, 总氮亦有所增加; 系统中氮流通量加大, 输入量大于输出量。土壤尚能有效缓冲大气氮沉降; 氮的输出量中, 以灯台树(Cornusccontroversa)和山胡椒(L.glauca)为主的阔叶林系统多于以日本柳杉(Cryptom eria japonicum ) 为主的针叶林系统; 阔叶林较针叶林更有效地抵抗酸沉降。氮的分布及其动态表明阔叶林生态系统对酸沉降具有较强的缓冲能力。
The water-soluble nitrogen (NH + 4 -N, NO-3 -N, NO-2 -N) in the forest ecosystem of Lushan in 1998 spring was measured in precipitation, tornado, stem water, soil seepage water and gully water And analytical research. The results showed that the pH value of acid rain in Lushan was higher than that in 1993, and the total nitrogen also increased. The nitrogen flux in the system was increased and the input was greater than the output. Soil nitrogen can effectively buffer the deposition of atmospheric nitrogen. Among the nitrogen output, the broad-leaved forest system dominated by Cornus cv. Troversa and L.glauca was dominated by Cryptom eria japonicum Coniferous forest systems; Broad-leaved forests are more resistant to acid deposition than coniferous forests. The distribution of nitrogen and its dynamics indicate that the broad-leaved forest ecosystem has strong buffering capacity for acid deposition.