【摘要】 利用分室模型对长白山高山冻原生态系统磷硫生物循环进行了研究.结果表明,长白山高山冻原植被土壤系统中总磷和总硫净储存分别为16088.6t和26079.4t,其中土壤库分别占99.2%和99.5%.磷硫在土壤库、凋落物库和植被库的分布极不平衡,储量分别是:植被库中磷46.14t、硫64.82t,其中地上部分储存磷21.88t、硫44.21t,地下根系储存磷24.28t、硫20.61t,在植物亚系统中47.4%的磷和68.2%的硫储存在地上部分;凋落物库中磷89.63t、硫53.16t;土壤库中磷15952.8t、硫26014.6t.长白山高山冻原植被土壤系统中,磷年吸收量和年凋落物归还量分别为24.25和31.59t;硫在地上植物活体、地下根系中年转移量和年凋落物归还量分别为31.18、10.12和21.06t,硫自然归还率为67.5%.更多还原

【Abstract】 The study with compartment model on the phosphorus （P） and sulphur （S） bio-cycling in alpine tundra ecosystem of Changbai Mountains showed that the total storage of P and S was 16 088.6 t and 26 079.4 t,of which,46.14 t and 64.82 t was in vegetation pool,89.63 t and 53.16 t in litterfall pool,and 15952.8 t and 26 014.6 t in soil pool,respectively.The above- and below-ground vegetation pool stored 21.88 t and 44.21 t,and 24.28 t and 20.61 t of P and S,respectively,and the above-ground vegetation pool had 47.4% of P and 68.2% of S in the vegetation subsystem.The transferable P amount was 24.25 t·yr^-1 through plant absorption and 31.59 t·yr^-1 through litterfall return,while the transferable S amount was 31.18 t·yr^-1,10.12 t·yr^-1 and 21.06 t·yr^-1 in the aboveground plant,belowground root system,and litterfall return,respectively.The natural return ratio of S was 67.5%.更多还原