秦岭火地塘不同海拔梯度森林土壤理化性质研究  

Forest Soil Physicochemical Properties along Different Altitudinal Gradients at Huoditang in the Qinling Mountains

作　　者：魏新[1] 郑小锋[1] 张硕新[1,2] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]秦岭森林生态系统国家野外科学观测研究站,陕西宁陕711600

出　　处：《西北林学院学报》2014年第3期9-14,共6页Journal of Northwest Forestry University

基　　金：国家林业局林业公益性行业科研专项(201004036)

摘　　要：为了探究森林土壤理化性质在不同海拔梯度的变化特征,对秦岭火地塘林区不同海拔梯度的森林土壤理化性质进行研究。在不同海拔梯度设置标准样地,分层取样,分别测定了土壤pH、容重、孔隙度、有机质、全氮、全磷、全钾含量。结果表明：1）秦岭火地塘森林土壤理化性质总体变化特征：土壤pH值为5.59-6.65,容重为0.78-1.40g·cm-3,孔隙度为36.29%-69.04%,有机质含量为16.84-70.14g·kg-1,全氮含量为0.32-3.05g·kg-1,全磷含量为0.32-0.69g·kg-1,全钾含量为15.28-23.24g·kg-1。2）火地塘地区森林土壤的理化性质随海拔梯度和采样深度呈现出一定的规律性和差异性：不同海拔梯度的土壤pH、容重随土层深度显著增加;土壤孔隙度、有机质、全氮含量随土层深度增加而降低;土壤全磷、全钾含量随土层无明显规律。Soil physicochemical properties in different altitudinal gradients at Huoditang in the Qinling Mountains were studied.Stratified sampling method was adopted to get soil samples,the bulk density,porosity,organic matter,total nitrogen,total phosphorus,total potassium and pH were determined.Soil physicochemical properties were as follows：the pH value：5.59-6.65,soil bulk density：0.78-1.40g· cm-3,soil porosity：36.29%-69.04%,soil organic matter：16.84-70.14g·kg-1,total N：0.32-3.05g ·kg-1,total P：0.32-0.69g·kg-1,and total K：15.28-23.24g·kg-1.The properties had some regularities and differences along with the altitudinal gradients and sampling depths.With the increase of section depth of soil samples in different altitudes,the pH and bulk density appeared gradual increase,but the porosity,organic matter and total N decreased,the total P and total K did not had obvious regularity.

关 键 词：秦岭 海拔梯度 土壤理化性质 

分 类 号：S714.2[农业科学—林学]