黑龙江东部山地兴安落叶松人工林对水质的影响

 为了解黑龙江省东部山地落叶松人工林生态系统对水质的影响,试验用多参数水质监测仪和原子吸收法对大气降水、穿透水、树干径流和地表径流中的pH值、溶解氧、浊度、电导率、氧化还原电位、K、Na、Ca、Mg、Cu、Zn、Mn和Fe等水质指标进行测定。结果表明:在落叶松人工林生态系统中,大气降水、穿透水、树干径流和地表径流pH值的变化都不甚明显,变异系数都较低。大气降水经过林冠层后溶解氧含量降低,浊度和电导率明显增加,氧化还原电位逐渐降低,Na、Ca和Mg离子总平均浓度逐渐升高。穿透水和树干径流中K、Ca元素的淋溶量明显高于其他元素,且树干径流各元素的净淋溶和淋溶系数均高于穿透水。地表径流对水质的酸化有缓冲作用。

Influence of Larix gmelinii Plantations at Eastern Mountainous Region in Heilongjiang Province on Water Quality

In order to know the influence of Larix gmelinii Plantations at eastern mountainous region in Heilongjiang province on the water quality,the water quality indexes in precipitation,throughfall,stemflow and runoff has been studied through the apparatus of water quality monitor and the method of atom absorb.Which include pH,DO,TURB,COND,ORP,K,Na,Ca,Mg,Cu,Zn,Mn and Fe etc..The results show that the value of pH varies unconspicuously in the precipitation, throughfall,stemflow and runoff,and the variance coefficient is lower.After precipitation passing through Larix gmelinii Plantations,the DO reduce gradually,the TURB and COND increase obviously.The ORP reduce gradually.The total average concentration of Na,Ca and Mg increase gradually.The net eluviation amount of K and Ca is higher than other elements of throughfall and stemflow.The net eluviation amount and eluviation coefficient of every element in stemflow is higher than that of throughfall.The runoff has the catabatic effect to acidification of water quality.