芒颖大麦草对菱镁矿粉尘污染的生态适应性  

Ecological adaptability of Hordeum jubatum to magnesite dust

作　　者：方英[1,2] 赵琼[1] 台培东[1] 吴海燕[3] 李培军[1] 秦秦[1,2] 邓鑫[1,2] 

机构地区：[1]中国科学院沈阳应用生态研究所污染生态与环境工程重点实验室,沈阳110016 [2]中国科学院大学,北京100049 [3]水利部黄河水利委员会黑河流域管理局,兰州730030

出　　处：《应用生态学报》2012年第12期3474-3478,共5页Chinese Journal of Applied Ecology

基　　金："十二五"国家科技支撑计划项目(2012BAC13B03);沈阳大学区域污染环境生态修复教育部重点实验室基金项目资助

摘　　要：采用盆栽试验,向土壤表面投加不同量(0、1%、5%、10%、15%、20%、30%)的菱镁矿粉尘,研究土壤理化性质和芒颖大麦草对镁的耐性.结果表明:菱镁矿粉尘施加到土壤表面时,可快速形成结皮.当菱镁粉尘比例超过20%时,土壤理化性质发生明显变化,表现为pH显著升高,电导率逐渐降低,有机质含量先降低后升高;芒颖大麦草的叶绿素含量随着镁粉尘含量的增加呈现先增加后降低的趋势,而可溶性蛋白含量随着镁粉尘含量的增加呈现先增加后降低再升高的趋势;芒颖大麦草具有较强的耐镁特性,土壤中镁浓度达到4.61g·kg-1时,芒颖大麦草仍生长良好.芒颖大麦草适宜作为菱镁矿区撂荒地生态恢复的植物种.Hordeum jubatum was pot-cultured with the soil sprayed with different amounts of magnesite dust （0, 1%, 5%, 10%, 15%, 20%, and 30% ） to study the magnesium （Mg） tolerance of the plant. After sprayed onto soil surface, the magnesite dust could rapidly form a crust. When the amount of the sprayed dust was bigger than 20%, soil pH increased significantly, soil conductivity had a gradual decrease, whereas soil organic matter content increased after an initial decrease. With the increasing amount of sprayed magnesite dust, the leaf chlorophyll content of H. jubatum increased first and decreased then, while the leaf soluble protein content showed a trend of increase - decrease - increase. H. jubatum had stronger tolerance to Mg. When the soil Mg content was as high as 4.61 g · kg^-1 , H. jubatum could still grow well, indicating that this plant species could be used as an appropriate candidate for the ecological restoration of waste lands in magnesite mining areas.

关 键 词：芒颖大麦草 镁 菱镁矿 生态恢复 

分 类 号：X173[环境科学与工程—环境科学]