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首页> 外文期刊>Plant and Soil >Silicon cycled by tropical forest trees: effects of species, elevation and parent material on Mount Kinabalu, Malaysia
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Silicon cycled by tropical forest trees: effects of species, elevation and parent material on Mount Kinabalu, Malaysia

机译：由热带森林树循环的硅：物种，海拔和母材在马来西亚吉巴卢山的影响

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Aims We aimed to compare uptake and litter flux of silicon (Si) across tropical tree species and sites on Mt. Kinabalu, Borneo. Methods Si flux components were measured at eight plots in tropical forests at four altitudes (700-3,100 m above sea level) on two types of parent materials (acidic sedimentary/granite rock and ultramafic igneous rock, paired at each elevation). Results Leaf Si concentration differed substantially among tree species (0.24-13.6 mg g(-1)). Species with high leaf Si concentrations occurred mostly in the lowest elevation plots on both parent materials. The abundance-weighted community means of live-leaf Si concentrations, as well as Si concentration in leaf litter, declined with increasing elevation. Annual leaf-litter Si flux and water extractable Si per unit air-dried soil also decreased with increasing elevation, whereas parent material type had little influence despite consistently higher pH by 0.5-1.0 unit in ultramafic soil. Conclusions Si uptake and litter Si flux were greater in lower elevation forests regardless of parent material types, most likely because Si accumulating species are more abundant in lowland tropical forests. These results suggest a stronger role of biota than the geochemistry of parent material and rock weathering in Si cycling in the forests on Mt. Kinabalu.
机译：旨在将硅（Si）的摄取和垃圾通量与热带树种和博物馆，婆罗洲Kinabalu，婆罗洲的吉拉邦的摄取和垃圾通量进行比较。方法在两种母体材料（酸性沉积/花岗岩岩石和超空白发泡岩，在每个高度配对）上，在热带森林中，在热带森林中在热带森林中的八个地块（700-3,100米），在热带森林中测量SI助焊剂组分。结果树种叶片浓度在树种（0.24-13.6mg（-1））中不同。具有高叶片浓度的物种主要发生在母材上的最低仰角。随着升高的增加，叶片浓度的丰富加权群落手段，以及叶片凋落物中的Si浓度下降。每单位叶窝SI助熔剂和水可提取的Si，每单位风干土也随着升高的增加而降低，而母体材料类型尽管在近外的粒子土壤中持续较高0.5-1.0单位，但母体材料类型仍然没有影响。结论较低海拔森林中的Si摄取和垃圾Si助焊剂在母体材料类型中，最有可能在低地热带林中累积物种更丰富。这些结果表明Biota的作用更强，而是在Mt.Kinabalu森林中Si骑自行车的父母材料和岩石风化的地球化学作用。

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