摘要 | 采用盆栽法对种植于添加铜尾矿矿砂(体积分数0%、25%、50%、75% 和100%)栽培基质中的黄花苜蓿(Medicago falcata Linn.)幼苗的生长及部分生理指标的变化进行了分析。结果表明:随栽培基质中铜尾矿矿砂体积分数的提高,黄花苜蓿的株高、根长、地上和地下部分干质量以及耐性指数均呈逐渐下降的趋势且总体上低于对照,但仅在铜尾矿矿砂体积分数较高(75%和100%)的条件下株高和地上部分干质量与对照差异显著(P<0. 05);地上和地下部分的CAT 活性和叶片光合色素(包括叶绿素a、叶绿素b 和类胡萝卜素)含量均逐渐下降且总体上低于对照,而地上和地下部分的POD 活性、GSH 含量和O2 |
Abstract | Changes of growth and some physiological indexes of Medicago falcata Linn. seedlings planted in culture substrate added with copper tailing sand of volume ratio of 0%, 25%, 50%, 75% and 100% were analyzed by pot culture method. The results show that with rising of volume ratio of copper tailing sand in culture substrate, seedling height, root length, dry weights of above- and under-ground parts, and tolerance index of M. falcata all appear the trend of decreasing gradually and are generally lower than those of the control. But only under condition of copper tailing sand with higher volume ratio (75% and100%), there are significant differences in seedling height and dry weight of above-ground part (P< 0. 05) with those of the control. CAT activity in above-and under-ground parts and photosynthetic pigment (including Chla,Chlb and carotenoid) content in leaf all decrease gradually and are generally lower than those of the control, while POD activity, GSH content and O2
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关键词 | 黄花苜蓿; 铜尾矿矿砂; 生长指标; 生理指标; 耐性指数 |
Key words | Medicago falcata Linn.; copper tailing sand; growth index; physiological index; tolerance index |
作者 | 许敏1, 韩玉林1,原海燕2, 赵文进1, 张继露1, 付佳佳3 |
所在单位 | 1. 江西财经大学艺术学院园林系江西省生态环境实验教学示范中心, 江西南昌330032; 2. 江苏省•中国科学院植物研究所(南京中山植物园), 江苏南京210014; 3. 南昌工学院, 江西南昌330108 |
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基金项目 | 江西省研究生创新基金项目(YC2012-S073) |