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用德国Solling地区挪威云杉林的严重酸化的未扰动土柱 ,在 1年半时间内 ,研究了在不存在干旱的条件下温度升高对渗滤水化学组成的影响。当平均气温由 1 2 3℃上升到 1 5 5℃时 ,土壤有机质分解速度明显加快 ,Norg、Corg、SO42 -的浓度和净淋失量明显增加 ,Al3+、NO3-的浓度和净淋失量明显降低 ,NH4+、HPO42 -、Cl-的浓度和净淋失量以及渗滤水的Ca2 +/Al3+比轻微增加 ,H+的浓度和净淋失量轻微降低 ,盐基离子则无明显变化。温度升高导致的反硝化作用增强是Al3+浓度降低的关键因素。简而言之 ,温度升高在一定程度上缓解了Al3+毒害 ,但并未改善盐基离子营养状况。
Using a heavily acidified undisturbed soil column from Norwegian spruce forests in Solling, Germany, the effects of temperature increase on the chemical composition of percolation water in the absence of drought were studied in a year and a half. When the average temperature was increased from 123 ℃ to 155 ℃, the decomposition rate of soil organic matter obviously accelerated. The concentration of Norg, Corg and SO42 - and the leaching loss of soil increased obviously. The concentration of Al3 +, NO3- and net leaching loss The concentrations of NH4 +, HPO42 -, Cl - and net leaching loss and the ratio of Ca2 + / Al3 + in leachate slightly increased. The concentration of H + and the leaching loss decreased slightly, while the content of salt - based ions did not change significantly. The increase of denitrification caused by the temperature increase is the key factor for the decrease of Al3 + concentration. In short, the temperature increase alleviates Al3 + poisoning to a certain extent, but does not improve the nutrition status of salt-based ions.