养分缺乏下外源有机酸对落叶松幼苗吸收Fe的影响  

Effects of Exogenous Organic Acids on Fe Absorption of Larix olgensis Seedlings with Nutrient Deficiency

作　　者：周丽[1] 黄文斌[1] 王煜婷[1] 马瑞[1] 宋金凤[1] 

机构地区：[1]东北林业大学,黑龙江哈尔滨150040

出　　处：《国土与自然资源研究》2012年第6期86-88,共3页Territory & Natural Resources Study

基　　金：国家自然科学基金项目(30901145);东北林业大学本科生创新性实验项目(11102250001)

摘　　要：用不同比例A1和B层暗棕壤混合(A1:B=1:2)制造土壤养分缺乏条件,系统研究了养分缺乏条件下,不同浓度外源有机酸对落叶松幼苗吸收运输Fe的影响及机理。结果表明,养分缺乏处理后,落叶松幼苗根系Fe含量升高,叶片含Fe量变化不一。不同浓度草酸和柠檬酸处理后,落叶松幼苗根系Fe含量提高,且提高幅度因处理时间和有机酸浓度而异。Different proportion of A1 and B horizons dark brown forest soils （A1：B =1：2） were utilized to set the soil nutrient deficient conditions, and the effects and mechanism of different concentrations of organic acid solutions on iron （Fe） absorption of Larix olgensis seedlings with nutrient deficiency were studied. The results showed that, comparing with those of A1 horizon soil,Fe contents in roots of Larix olgensis seedlings increased, but Fe contents in leaves had no rules. After treatments of exogenous organic acids, Fe contents in roots of Larix olgensis seedlings increased, and varied with treatment times and concentrations of organic acids.

关 键 词：养分缺乏 有机酸 落叶松 铁 

分 类 号：S153[农业科学—土壤学]