长岗山不同林分类型对土壤理化性质的影响

以广州市长岗山自然保护区中的湿地松林(Pinus elliottii)、桉树林(Eucalyptus urophylla)和木荷林(Schima superba)为研究对象,对比不同林分类型、不同土壤层次下的土壤理化性质.结果表明:(1)土壤容重和吸湿水含量表现为湿地松林>木荷林>桉树林,土壤自然含水量、全氮和速效钾含量表现为湿地松林>桉树林>木荷林,土壤pH、有机质和速效钾含量表现为桉树林>湿地松林>木荷林;(2)在不同林分类型0~60 cm土层下,土壤容重、自然含水量、有机质差异显著(P<0.05),土壤吸湿水含量、pH、全氮、速效磷、速效钾含量差异不显著;(3)不同土层深度、林分类型与土层深度交互作用下土壤理化性质无显著差异.

Soil Physical and Chemical Properties Under Different Forest Type in Changgang Mountain

To research the soil under Pinus elliottii forest,Eucalyptus urophyllaforest and Schima superba forest in Changgangshan Natural Reserve of Guangzhou. We made a comparative study for the physical and chemical properties of soil under different forest types and in different soil layers. The results showed that:(1) the soil bulk density and hygroscopic water content under differernt forest type followed the linage order thatP. elliottii forest >S. superbaforest >E. urophylla; for soil natural water content, total nitrogen (TN) and available potassium(AK), the linage order wasP. elliottii forest>E. urophylla forest >S. superba; for soil pH, soil organic matter (SOM) and available phosphorus (AP), the linage order wasE. urophylla forest>P. elliottii forest>S. superbaforest.(2)The soil bulk density, natural water content, SOM in the 0~60 cm soil layer of different forest types showed significant differences, but there were no significant differences between the soil hygroscopic water content, pH, TN,AP and AK.(3)The physical and chemical properties of soil showed no significant difference in different soil layers. Moreover, the physical and chemical properties of soil had no significant difference under the interaction of forest types and soil layers.