Water Effects Of Two Forest Ecosystems And Effects Of Thinning On Forest Water Quality At Huoditang Region In Qinling Mountains

The objective of this study was to investigate the effects of different components ofBetula albo-sinensis and Quercus aliena var. acuteserrata forest ecosystems on water qualityduring the rainfall-runoff process. The study area was in Huoditang forest region within theQinling Mountain range. For purposes of analysis, the forest ecosystem was divided spatiallyinto three components: canopy, litter, soil. Water samples were collected from rainfall,throughfall, litter drainage and soil infiltration water. The samples were analyzed chemicallyand then compared to determine the effects of different components of the ecosystem onwater quality. The analyses indicated that three components of Betula albo-sinensis andQuercus aliena var. acuteserrata forest ecosystems all have the ability to rise the pH of thewater. Effects on the alkaline earth metal elements in the water, Quercus aliena var.acuteserrata forest canopy layer be leached out of K, Ca and Mg ability stronger than Betulaalbo-sinensis forest canopy layer, Quercus aliena var. acuteserrata forest canopy layer of Nain water adsorption capacity is better than Betula albo-sinensis forest canopy layer, Betulaalbo-sinensis forest litter layer be leached out of K, Ca and Mg ability stronger than theQuercus aliena var. acuteserrata forest litter layer, Quercus aliena var. acuteserrata forestlitter layer is leached out Na ability stronger than Betula albo-sinensis forest litter layer,Betula albo-sinensis forest soil layer be leached out of the Ca’s ability stronger than Quercusaliena var. acuteserrata forest soil layer, Quercus aliena var. acuteserrata forest soil layer isleached out Na ability stronger than Betula albo-sinensis forest soil layer, Betula albo-sinensisforest soil layer adsorption ability of K is a bit stronger than Quercus aliena var. acuteserrataforest soil layer, the Quercus aliena var. acuteserrata forest soil layer adsorption ability ofMg is a bit stronger than Betula albo-sinensis forest soil layer, Betula albo-sinensis forestecological system to increase the water Na ability stronger than Quercus aliena var.acuteserrata forest ecosystem, Quercus aliena var. acuteserrata forest ecological system toincrease the ability of K, Ca, Mg in water is better than Betula albo-sinensis forest ecosystem. On the heavy metals in the water, Betula albo-sinensis forest canopy layer of Pb and Cdadsorption ability stronger than Quercus aliena var. acuteserrata forest canopy layer, Quercusaliena var. acuteserrata forest canopy layer of Cu, Cr and As adsorption ability is better thanBetula albo-sinensis forest canopy layer, Betula albo-sinensis forest litter layer of Pb, Cd, Cr,As adsorption ability stronger than Quercus aliena var. acuteserrata forest litter layer,Quercus aliena var. acuteserrata forest litter layer of Cu adsorption capacity is better thanBetula albo-sinensis forest litter layer, Betula albo-sinensis forest soil layer Cd and Asadsorption ability stronger than Quercus aliena var. acuteserrata forest soil layer, Quercusaliena var. acuteserrata forest soil layer of Cu and Cr adsorption capacity is better thanBetula albo-sinensis forest soil layer, Betula albo-sinensis forest soil layer is leached out Pbability stronger than Quercus aliena var. acuteserrata forest soil layer, Betula albo-sinensisforest ecosystem’s ability to reduce the Pb, Cd in water than Quercus aliena var. acuteserrataforest ecological system, Quercus aliena var. acuteserrata forest ecosystem Cu, Cr, As theability to reduce water is better than Betula albo-sinensis forest ecosystem.N, P element, Betula albo-sinensis forest canopy layer be leached out of PO43-ability abit stronger than Quercus aliena var. acuteserrata oak forest, Quercus aliena var.acuteserrata forest canopy layer be leached out of NH4+ability stronger than Betulaalbo-sinensis forest, Quercus aliena var. acuteserrata forest canopy layer of rainfall NO3-absorption ability is better than Betula albo-sinensis forest canopy layer, Betula albo-sinensisforest litter layer be leached out of NO3-, NH4+ability stronger than Quercus aliena var.acuteserrata forest litter layer, Quercus aliena var. acuteserrata litter layer be leached out ofPO43-ability stronger than Betula albo-sinensis forest litter layer, Betula albo-sinensis forestsoil layer PO43-and NH4+adsorption ability, stronger than Quercus aliena var. acuteserrataforest hydrogels, Quercus aliena var. acuteserrata forest soil layer be leached out of NO3-ability stronger than Betula albo-sinensis forest soil layer.To study the different tending thinning intensity on forest ecological effect of waterquality. Results show that throughfall and litter drainage water quality had no significantinfluence P>0.05, but pH, K and Cr of soil infiltration water of B. albo-sinensis Burkill andCa, Mg, Na, Pb and Cr of soil seepage water of Quercus aliena var. acuteserrata aresignificant effect P <0.05, suggesting that tending thinning mainly affected by forest soillayer to impact on forest water quality.