紫色土区不同林龄油茶人工林土壤理化性质差异分析

摘要

以宁化紫色土区不同林龄(15、25、35 a)油茶人工林为研究对象,在生长量调查的基础上,分析不同林龄间土壤理化性质的差异.结果表明:①不同林龄油茶人工林平均地径和平均树高随林龄的增长而增长;②随着土层深度的加深,土壤总孔隙度、有机质、全氮、全磷、速效钾、有效磷含量均呈下降趋势,土壤容重和全钾含量呈上升趋势;③随着林龄的增长,同一土层深度油茶人工林土壤密度、容重、有机质含量、速效钾含量、有效磷含量、全磷含量均呈倒“V”变化趋势,土壤孔隙度则呈“V”变化趋势,全钾则是呈持续上升趋势.%Different age (15-year,25-year and 35-year) of Camellia oleifera plantation in Ninghua purple soil areas were acted as experimental forests,based on the investigation of growth of Camellia oleifera forest,the soil physical and chemical properties of different ages of Camellia oleifera plantations were analyzed.The results showed that:①)With the increase of the forest age,the average diameter and tree height of Camellia oleifera were showed the increase trend;②)With the increase of soil layer,soil density,organic matter,available P and available K were showed the down trend,and soil bulk density and total K showed the rising trend;(③) With the increase of forest age,soil bulk density,soil density,organic matter,available P and available K showed the inverted "V" trend,the soil porosity showed the "V" trend,but the total K showed the continue rising trend.