The chemical properties of water in Fraxinus mandshurica at Eastern Mountainous Region in Heilongjiang Province

摘要

The water quality in rainfall, throughfall, stemflow and litterthrough in the Fraxinus mandshurica at Eastern Mountainous Region in Heilongjiang Province had been studied. The indicator included pH, Do, TURB, TDS, COND, ORP, K, Na, Ca, Mg, Cu, Zn, Mn and Fe. The results showed that the chemical properties of rainfall has been changed after it passing through forest canopy. The value of Do and ORP was lower than those of rainfall. The value of TURB, TDS and COND increased obviously. The element contents in stemflow were higher than those in rainfall and throughfall except Mn. The variance of pH and Do was not remarkably and the variance coefficients of pH and Do was lower in rainfall, throughfall, stemflow and litterthrough. The value of TURB and TDS varied remarkably, and the variance coefficients of TURB and TDS was higher. The leaching coefficient of throughfall was in the following order: K> Mg> Mn> Fe> Ca> Cu> Na> Zn. The leaching coefficient of stemflow was in the order of K> Mg> Fe> Cu> Ca> Mn> Na> Zn. And the leaching coefficient of litterthrough was in the following order: Mg> Fe> Na> Ca> Mn> K> Cu> Zn.