不同根区温度对冬小麦生长发育及养分吸收的影响  

Effect of different root zone temperature on growth development and N,P and K uptake of winter wheat

作　　者：刘炜[1,2] 杨君林[3] 许安民[1,4] 张建平 田霄鸿[1,4] 高亚军[1,4] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]陕西省宝鸡市农业技术推广服务中心,陕西宝鸡721001 [3]甘肃省农业科学院土壤与肥料研究所,甘肃兰州730070 [4]农业部黄土高原农业资源与环境修复重点开放实验室,陕西杨凌712100 [5]陕西省西安市长安区农技推广中心,陕西西安710100

出　　处：《干旱地区农业研究》2010年第4期197-201,共5页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金项目(40471069);教育部"新世纪优秀人才支持计划"项目(NCET-08-0465);现代农业产业技术体系建设专项;西北农林科技大学2007"青年学术骨干支持计划"项目

摘　　要：以Hoagland营养液为介质,采用自制的恒温培养系统研究了不同根区温度对冬小麦生长发育以及N、P、K养分吸收的影响。结果表明:小麦冬前至返青期低温处理明显抑制根系发育,根长、根体积、根系生物量、叶面积、地上部生物量、养分累积量均比常温处理显著降低,其中越冬前低温处理对地上部的影响大于对根系的影响,而返青期低温处理对根系的影响大于地上部;越冬前和越冬期高温促进了根系生长,但地上部生物量和养分累积量呈降低趋势,返青期高温抑制了根长和根体积的增加,但有促进地上部生长的作用。A pot experiment was conducted to investigate the effect of different root zone temperature on growth development and N,P and K uptake of winter wheat in Hoagland solution.The results showed that low temperature restrained root development during pre-winter stage,winter period and turning green stage.Root length,root volume,root biomass,leaf area,shoot biomass,nutrient uptake of low temperature treatments decreased significantly compared to normal temperture treatments.Aboveground part of winter wheat was more sensitive to the decrease of root zone temperature than root during pre-winter stage.The reverse was true during turning green stage.High temperature improved root growth while it trended to reduce shoot biomass and nutrients uptake during pre-winter stage and winter stage.High temperature reduced root length and volume while improved aboveground part growth of wheat during turning green stage.

关 键 词：根区温度 冬小麦 生长发育 养分吸收 

分 类 号：S512.11[农业科学—作物学] S152.8