不同海拔梯度对黄山松林土壤磷组分的影响

Effects of Different Altitude Gradient on Soil Phosphorus Composition in Mount Huangshan Pine Forest

分析不同海拔梯度对黄山松林土壤磷(P)组分的影响。将亚热带黄松山林作为研究的分析对象,选取海拔1300m和海拔1600m黄山松林,对比不同海拔梯度黄山松林淋溶层和淀积层的土壤基本理化性质和土壤磷组分情况。研究表明:土壤基本理化性质:海拔1300m黄山松林地淋溶层土壤温度、总氮(TN)、有机碳(SOC)、硝态氮(NO_(3)^(-))含量高于海拔1600m(P<0.05);海拔1300m黄山松林淀积层pH值、含水率(M)、铵态氮(NH_(4)^(+)-N)、TN、SOC、NO_(3)^(-)含量高于海拔1600m林地;土壤磷组分:除淋溶层土壤Resin-P外,海拔1300m林地淋溶层、淀积层易分解态磷(NaHCO_(3)-Pi、Na HCO_(3)-Po)、中等易分解态磷(NaOH-Pi、NaOH-Po)、难分解态磷(Residual-P)、总磷(TP)所占比例均高于海拔1600m林地(P<0.05)。亚热带地区黄山松林土壤基本理化性质及土壤磷组分受海拔影响比较大,为黄山松林地土壤磷调控提供一定依据。

To analyze the effect of different altitude gradients on phosphorus(P)composition of soil in Mount Huangshan pine forest.The subtropical Pinus taiwanensis forest was selected as the analysis object of this study,and the basic physical and chemical properties and phosphorus components of soil in the eluviation layer and sediment layer of the Mount Huangshan pine forest at an altitude of 1300 m and 1600 m were compared with those of the Mount Huangshan pine forest at different altitudes.Basic physical and chemical properties of soil:The soil temperature,total nitrogen(TN),organic carbon(SOC),nitrate nitrogen(NO_(3)^(-))content in the leaching layer of Mount Huangshan pine forest at 1300 m altitude were higher than those at 1600 m altitude(P<0.05);The pH value,water content(M),ammonium nitrogen(NH_(4)^(+)-N),TN,SOC,NO_(3)^(-) content in the sediment of Mount Huangshan pine forest at 1300 m above sea level are higher than those of the forest at 1600 m above sea level;Soil phosphorus composition:Except for the soil Resin-P in the eluvial layer,the proportion of easily decomposable phosphorus(NaHCO_(3)-Pi,NaHCO_(3)-Po),moderately decomposable phosphorus(NaOH-Pi,NaOH-Po),difficultly decomposable phosphorus(Resin-P),and total phosphorus(TP)in the eluvial layer and sediment layer of the forest land at an altitude of 1300 m is higher than that of the forest land at an altitude of 1600 m(P<0.05).The basic physical and chemical properties and soil phosphorus components of the Mount Huangshan pine forest in the subtropical region are greatly affected by altitude,providing a certain basis for soil phosphorus control in the Mount Huangshan pine forest.