桂西北环境移民安置区柑橘园土壤环境动态研究  

Dynamics of soil fertility of citrus orchards in demonstration area of environmental immigrants,Northwest Guangxi

作　　者：肖润林[1] 苏以荣[1] 何铁光[1] 王克林[1] 

机构地区：[1]中国科学院亚热带农业生态研究所,长沙410125

出　　处：《中国生态农业学报》2005年第4期135-137,共3页Chinese Journal of Eco-Agriculture

基　　金：国家科技攻关重大项目(2001BA606A-8);中国科学院知识创新工程重要方向性项目(KZCX3-SW-426);中国科学院重点项目(NK十五-D-15)资助

摘　　要：对桂西北环境移民安置区柑橘园开垦后土壤环境动态变化的研究结果表明,该安置区土壤肥力总体变化趋势呈先降后升,土壤pH值微弱降低,土壤酸性强度有所增强,土壤有机质含量先降后升,全N含量呈下降趋势,而水解氮和全P、速效钾及速效磷含量均呈上升趋势,全K含量先升后降,并分析了土壤各养分演变成因。The dynamics of soil fertility of citrus orchards in demonstration area of environmental immigrants , Northwest Guangxi was studied. The results show that the soil fertility level decreases first and then increases. The pH value decreases slightly, and acidity is strengthened. The content of organic matter decreases first and then increases slightly. The content of total N decreases and the content of hydrolysable N, total P,available K and available P have been raised as a whole. The content of total K increases first and then decreases. Finally,the reasons of the soil nutrient changes are explained.

关 键 词：环境移民 柑橘园 土壤环境 土壤养分 环境动态变化 移民安置区 土壤肥力 桂西北 土壤有机质含量 土壤PH值 

分 类 号：S158[农业科学—土壤学] P941.62[农业科学—农业基础科学]