缙云山不同森林植被下土壤理化性状研究  

Investigation of the Physico-Chemical Properties of the Soil under Different Types of Forest Vegetation

作　　者：陈晨[1] 高明[1] 郑杰炳 陈凌静 李东[1] 

机构地区：[1]西南大学资源环境学院,重庆400715 [2]重庆煤田地质研究所,重庆400042 [3]重庆市土地勘测规划院,重庆400020

出　　处：《西南大学学报（自然科学版）》2010年第3期88-92,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家科技支撑计划资助项目(2007BAD87B10-022008BABA7B09-03)

摘　　要：采用野外调查与室内分析相结合的方法对缙云山不同森林植被下土壤理化性状进行研究．结果表明，不同森林植被覆盖对土壤理化性状有较大的影响．阔叶林下土壤的孔隙度最大，为60．85％±19．04％，针叶林下土壤的孔隙度最小，为52．34％±12．37％．阔叶林下土壤中的碱解氮、速效钾含量明显高于针叶林与针阔混交林；速效磷含量在0～5cm土层由大到小顺序是阔叶林，针阔混交林，针叶林，但在5～40cm土层由大到小的顺序却是针叶林，阔叶林，针阔混交林．三种森林植被下土壤有机碳含量随着土层的加深呈现下降的趋势，不同森林植被间土壤有机碳含量由大到小顺序是阔叶林，针叶林，针阔混交林．The physico-chemical properties of the soils under coniferous forests, mixed forests and broad- leaved forests in the Jinyun mountains were studied by means of field survey and laboratory analysis. Maximum soil porosity of about 60.85 %± 19.04% was noticed in broad-leaved forests while minimum soil porosity of about52.34%±12.37% was found in coniferous forests. Alkali-hydrolyzable N and available K were higher in broad-leaved forests than in conferred forests and mixed forests. Available P content appeared in the sequence of broad-leaved forests 〉 mixed forests 〉 coniferous forests in the 0 - 5 cm soil layer and in the sequence of coniferous forests 〉 broad-leaved forests 〉 mixed forests in the 5-40 cm soil layer. Soil organic carbon （SOC） tended to decrease with increasing soil depth and appeared in the sequence of broad-leaved forests 〉 coniferous forests 〉 mixed forests.

关 键 词：森林植被类型 土壤孔隙度 土壤速效养分 土壤有机碳 

分 类 号：S714.2[农业科学—林学]