摘要
为探索梵净山国家自然保护区不同海拔对土壤养分含量的影响,采用野外实地调查、采样和室内分析相结合的方法,分析比较不同海拔不同土壤深度养分含量变化特征。结果表明：梵净山不同海拔高度土壤pH为4.02～6.41,土壤为弱酸性到强酸性反应;随着海拔的升高,养分含量表现出一定的垂直差异分布,不同深度土壤有机质、碱解氮、速效钾、有效磷含量呈先增加后减少的趋势。土壤养分在海拔500～520m综合含量较低,其余海拔高度养分含量均较为丰富,在海拔1 500～2 000m达最大值。不同海拔的表层土壤有机质、碱解氮和有效磷含量均高于深层土壤,且随着海拔的增加呈波浪式上升;速效钾在海拔500～520m、1 500～2 000m表现出深层土壤大于表层土壤外,其余海拔区域表土大于深层土。
The nutrient contents of soils at different elevation in Fanjingshan Nature Reserve were analyzed by field survey and indoor analysis methods to study the effect of different elevation on soil nutrient content in Fanjingshan Nature Reserve. Results.pH of soils at different elevation is from 4.02～ 6.41. The soil nutrient content shows a certain vertical differentiation distribution with increase of elevation. The content of organic matter （OM）, available nitrogen （AN）, rapid available potassium （RAP） and available phosphorus （AP） of soils with different depth represents a first rising and then declining trend with increase of soil depth. The integrated nutrient content of soil with an elevation of 500～520 m is lower but the integrated nutrient content of soil with other elevations is rich and the integrated nutrient content of soil with an elevation of 1 500～2 000 m reaches the maximum. The content of OM, AN and AP in surface soils with different elevation is higher than deep soil and shows a wave-like rising with elevation increase. The RAP content in surface soils with different elevation is higher than deep soils except for surface soils with an elevation of 500～520 m and 1 500～2 000 m.
出处
《贵州农业科学》
CAS
2015年第8期146-150,共5页
Guizhou Agricultural Sciences
基金
贵州省省院合作项目"梵净山自然保护区不同植被类型元素化学计量与生态稳定性的关系研究"[黔科合院地合(2013)7002]
贵州省社发攻关课题"气候变化对濒危植物梵净山冷杉的响应及其种质资源保育关键技术研究"[黔科合SY字(2013)3152]
梵净山国家自然保护区管理局科技专项"梵净山土壤类型与性状特征调查"
关键词
土壤养分
海拔
梵净山自然保护区
养分特征
soil nutrient
elevation
Fanjingshan Nature Reserve
nutrient characteristics
