辽东山区不同林龄落叶松人工林土壤理化特征  

Soil Physicochemical Characteristics of Larch Plantation with Different Ages in Eastern Mountains of Liaoning Province

作　　者：李晓飞 

机构地区：[1]辽宁省宽甸满族自治县林业调查规划院,辽宁丹东118200

出　　处：《防护林科技》2016年第5期1-3,共3页Protection Forest Science and Technology

基　　金：国家林业公益性行业科研专项(200904064)

摘　　要：以辽东山区落叶松人工林为研究对象,研究不同林龄的林分土壤理化特征,为辽东山区落叶松人工林的维护地力提供科学数据。结果表明:不同林龄落叶松人工林土壤容重大小顺序为6a林龄(1.38g·cm^(-3))>15a林龄(1.29g·cm^(-3))>24a林龄(1.17g·cm^(-3))>37a林龄(1.14g·cm^(-3)),随林龄增加土壤容重呈减少趋势且差异显著,而同一剖面土壤容重随土层深度增加呈增大趋势;土壤总孔隙度和毛管孔隙度随土壤深度增加呈减少趋势,随着林龄的增加先下降后上升;不同林龄土壤有机质和全氮平均值大小顺序为37a林龄(39.29g·kg^(-1)、2.53g·kg^(-1))>24a林龄(37.51g·kg^(-1)、2.46g·kg^(-1))>15a林龄(30.47g·kg^(-1)、1.95g·kg^(-1))>6a林龄(21.37g·kg^(-1)、0.89g·kg^(-1)),随林龄增加呈增大趋势且差异显著;不同林龄土壤全磷和全钾含量差异显著,变化呈不规律性。Taking larch plantations in eastern mountains of Liaoning Province as the research object,soil physicochemical characteristics of stand with different stand age were studied,which provides scientific data to keep soil fertility for larch plantation.Result shows that the order of soil bulk density for larch plantation with different ages is：6aforest age（1.38g·cm^-3） 15 aforest age（1.29g·cm^-3） 24 aforest age（1.17g·cm^-3） 37 aforest age（1.14g·cm^-3）,soil bulk density decrease with the increase of forest age and the difference is significant;the bulk density in the same soil profile increase with the increase of the soil depth;total soil porosity and capillary porosity decreased with the increase of soil depth;stand age of first decline after rise with increase of the stand age.Soil organic matter and average order of total size with different stand age is：37aforest age（39.29g·kg^-1,2.53g·kg^-1） 24 aforest age（37.51g·kg^-1,2.46g·kg^-1） 15 aforest age（30.47g·kg^-1,1.95g·kg^-1） 6aforest age（21.37g·kg^-1,0.89g·kg^-1）,increase with the increase of forest age and have different significance;total phosphorus and potassium content of soil with different forest age have different significances,with irregular changes.

关 键 词：辽东山区 林龄 落叶松 土壤理化特征 

分 类 号：S714.2[农业科学—林学]