摘要
采集了福建长汀红壤侵蚀区5个植被恢复阶段(裸地,马尾松恢复5、15、30年人工林,天然次生林)的土壤,分析了这些土壤的理化性质及不同形态铁铝氧化物含量的变化特征.结果表明,随植被恢复年限增加,土壤非晶形铁铝氧化物(Feo、Alo)、游离结晶态铁铝氧化物(Fed、Ald)和络合态铁铝氧化物(Fes、Als)含量均逐渐增多.土壤有机质、全氮和全磷含量表现为天然次生林>马尾松恢复30年人工林>马尾松恢复15年人工林>马尾松恢复5年人工林>裸地;土壤铵态氮、硝态氮、碱解氮、速效磷和速效钾含量也随植被恢复年限增加而显著增多.随着铁铝氧化物含量的升高,土壤pH呈降低趋势,土壤养分呈增加趋势;红壤侵蚀区植被恢复过程中,游离结晶态和络合态铁铝氧化物可能比非晶形铁铝氧化物更有助于土壤养分的累积.
Soils were sampled from vegetations which were under five sequential restoration stages, namely bare land, 5-, 15-and 30-years-old Pinus massoniana plantations and natural forest. Soil physical and chemical properties and various states of iron-aluminum oxides were evaluated. The results showed that with the increase of restoration span, amorphous iron-aluminum oxide(Feo, Alo), free iron-aluminum oxide(Fed, Ald) and complex iron-aluminum oxide(Fes, Als) contents in soils were all increased. Soil organic matter, total nitrogen and total phosphorus contents were the highest in natural forest, which were followed by 30-, 15-, 5-years-old plantation, and bare land in a descending order. Soil ammonium nitrogen, nitrate nitrogen, alkaline nitrogen, available phosphorus and available potassium contents also rose as restoration was in progress. Soil iron-aluminum oxides contents were significantly negatively correlated with soil pH values, and significantly positively correlated with soil nutrients. But in the course of vegetation restoration in the eroded red soil areas, free crystallized and complex iron-aluminum oxides are effective than amorphous iron-aluminum oxide in boosting the accumulation of soil nutrients.
作者
吴敏敏
刘俊第
林雪萍
杨逸伟
方熊
易志刚
WU Minmin;LIU Jundi;LIN Xueping;YANG Yiwei;FANG Xiong;YI Zhigang(Fujian Provincial Key Laboratory of Soil Environment Health and Regulation,College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China)
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2020年第3期386-391,共6页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
福建省自然科学基金项目(2018J01735,2018J01621)
福建省教育厅中青年教师教育科研项目(JAT170169).
关键词
红壤侵蚀区
植被恢复
铁铝氧化物
土壤养分
eroded red soil region
vegetation restoration
iron-aluminum oxides
soil nutrients
