海南不同林地土壤性状差异研究  

Study on Soil Properties of Eucalyptus Plantation in Hainan

作　　者：徐伟 张玉平 杨振宇 李梦缘 李思雨 尹力初 XU Wei;ZHANG Yu-ping;YANG Zhen-yu;LI Meng-yuan;LI Si-yu(College of Resources and Environment,Hunan Agricultural University,National Engineering Laboratory of Soil and Resources Efficient Utilization,Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use,Hunan Provincial Key Laboratory of Plant Nutrition in Common University,Changsha 410128,PRC)

机构地区：[1]湖南农业大学资源环境学院农田污染控制与农业资源利用湖南省重点实验室植物营养湖南省普通高等学校重点实验室土壤肥料资源高效利用国家工程实验室

出　　处：《湖南农业科学》2019年第11期42-45,51,共5页Hunan Agricultural Sciences

基　　金：国家重点研发计划项目(2012BAD15B04)

摘　　要：选取海南样地土壤为研究对象,分析不同林地类型对土壤养分含量的影响,探讨土壤性状差异。结果表明:(1)海南桉树林地相对有利于降低土壤容重,增强水稳性团聚体稳定性。(2)海南桉树林地有利于提高土壤有机质含量。(3)海南林用地条件下土壤整体呈现酸化趋势,桉树林地全氮、碱解氮含量随土层加深呈现下降趋势,全磷、速效磷含量总体呈现下降趋势,有机质、全钾、速效钾含量总体呈现升高趋势。(4)不同林龄桉树林土壤中全磷、速效磷含量变化不显著外,其余养分含量均随着土层深度的增加逐渐降低。Taking Hainan eucalyptus plantation as the research object with 4 other kinds of plantations or natural forest as reference plots,the effects of different forest land types on soil nutrient content were analyzed,and the differences of soil properties were discussed.The results showed that:(1)eucalyptus plantations were relatively helpful to reduce soil bulk density and enhance the stability of waterstable aggregates;(2)eucalyptus plantations can improve the content of soil organic matter;(3)soil pH showed an overall acidification trend under forest land conditions in Hainan;total nitrogen and alkali-hydrolyzed nitrogen content of eucalyptus plantations showed a downward trend with the deepening of soil layer;total phosphorus and available phosphorus content showed a downward trend,while organic matter,total potassium and available K showed an upward trend;(4)the contents of total phosphorus and available phosphorus in the soil of eucalyptus plantations of different ages did not change significantly,but the contents of other nutrients decreased gradually with the increase of soil depth.

关 键 词：桉树人工林 土壤养分 林龄 海南 

分 类 号：S714[农业科学—林学]