西双版纳大渡岗茶园土壤磁化率垂直分布特征

摘要

磁性测量具有灵敏度高、成本低、简便、对样品无破坏等特点,已经成为研究土壤的主要手段之一.目前有关土壤磁性的研究多集中在城市土壤、森林、农田等领域,而对于茶园土壤磁性的系统研究尚未见报道.以普洱茶生产基地云南西双版纳大渡岗茶园土壤为研究对象,选择不同植茶年龄的样地5块,每块样地采集3条土壤剖面,剖面深度为120 cm,采样间隔20 cm.分析结果显示,5块样地茶园土壤低频磁化率平均值的分布范围是(32×10-8～332×10-8)m3/kg.研究结果表明:在研究区耕作管理活动和植被类型是影响土壤磁性的重要因素.%Magnetic measurement is highly sensible,low cost,convenient.Its nondestructive Magnetic measurement has become one major method to make a study of soil.Currently,soil magnetic study is mostly concentrated on urban regions,forest and agricultural soil,while the comprehensive researches on soil magnetic in tea plantation are not involved.Soil magnetic susceptibility of Pu'er Tea production base in Dadugang Xishuangbanna will be investigated in this paper.We chose five areas which grows tea trees of different ages to take three soil profile in each testing area.The depth of each profile is 120 cm and sampling interval is 20 cm.The results indicate that the average value of LF magnetic susceptibility ranges from 32 × 10-8 m3/kg to 332 × 10-8 m3/kg.All the results above show that farming administration activity and the vegetation are the main factors that influence the soil magnetic susceptibility.