首页 | 本学科首页   官方微博 | 高级检索  
     检索      

黄土高原旱区长期施肥条件下土壤钾素形态空间分布特征及有效性研究
引用本文:李芳林,郝明德,李燕敏,高长青.黄土高原旱区长期施肥条件下土壤钾素形态空间分布特征及有效性研究[J].干旱地区农业研究,2009,27(3):127-131.
作者姓名:李芳林  郝明德  李燕敏  高长青
作者单位:1. 西北农林科技大学资源环境学院,陕西,杨凌,712100
2. 西北农林科技大学资源环境学院,陕西,杨凌,712100;中国科学院水利部水土保持研究所,陕西,杨凌,712100
3. 长武县农业技术推广中心,陕西,长武,713600
基金项目:国家科技支撑计划,中国科学院知识创新工程重要方向性项目 
摘    要:在黄土高原南部旱地长期肥料定位试验的基础上研究了土壤钾素空间分布特征及其有效性.结果表明:长期施肥后土壤中特殊吸附性钾(SAK)和非特殊吸附性钾(NSAK)储量增加,但水溶性钾(WSK)和非交换性钾(NEK)则有明显的下降,单施N水溶性钾下降了48.24%,单施P下降32.32%,NP配施和NPK配施分别下降10.61%和17.93%,非交换性钾降幅为8.56%~24.91%.增施钾肥可以缓解因长期施肥作物生长所携出的钾素,增加耕层土壤中的水溶性钾、非特殊吸附性钾及特殊吸附性钾.相关分析结果表明,土壤不同形态钾素对速效钾的重要性依次为WSK>NSAK>SAK>NEK,土壤速效钾与水溶性钾、非特殊吸附性钾呈显著相关,与特殊吸附性钾和非交换性钾无显著相关性.

关 键 词:长期施肥  土壤钾素形态  空间分布  有效性  黄土高原旱区

Research on characteristics of spatial distribution and availability of soil potassium forms under long-term fertilization in the dryland of the Loess Plateau
LI Fanglin,HAO Mingde,LI Yanmin,GAO Changqing.Research on characteristics of spatial distribution and availability of soil potassium forms under long-term fertilization in the dryland of the Loess Plateau[J].Agricultural Research in the Arid Areas,2009,27(3):127-131.
Authors:LI Fanglin  HAO Mingde  LI Yanmin  GAO Changqing
Institution:1.College of Resources and Environment;Northwest A & F University;Yangling;Shaanxi 712100;China;2.Institute of Soil and Water Conservation;Chinese Academy of Sciences and Ministry of Water Resources;3.Changwu Agricultural Technology Extension Center;Changwu;Shaanxi 713600;China
Abstract:Research on characteristics of spatial distribution and validity of soil potassium was carried out in the long-term orientation fertilization experiment.The result showed that there was significant increase of specifically adsorbed potassium(SAK) and non-specifically adsorbed potassium(NSAK) reserves,while the water soluble potassium(WSK) and non-exchangeable potassium(NEK) were obviously decreased.The WSK decrease were 48.24% in the single N treatment,32.32% in the single P treatment,10.61% in the combinat...
Keywords:long-term fertilization  soil potassium form  spatial distribution  availability  dryland of the Loess Plateau  
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《干旱地区农业研究》浏览原始摘要信息
点击此处可从《干旱地区农业研究》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号