| 酸性环境中亚铁离子对紫花苜蓿WL525早期生长和生理的影响 |
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| 引用本文： | 李剑峰,师尚礼,张淑卿.酸性环境中亚铁离子对紫花苜蓿WL525早期生长和生理的影响[J].草业学报,2009,18(5):10-17. |
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| 作者姓名： | 李剑峰 师尚礼 张淑卿 |
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| 作者单位： | 1.甘肃农业大学草业学院,甘肃 兰州 730070;2.草业生态系统教育部重点实验室 中-美草地畜牧业可持续发展研究中心,甘肃 兰州 730070 |
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| 基金项目： | 国家科技部"西北优势和特色牧草生产加工关键技术研究与示范"，"奶牛优质饲草生产技术研究及开发"，"优质抗逆专用草新品种选育"，农业部行业专项"人工草地优质牧草生产技术研究与示范"，现代农业产业技术体系建设专项 |
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| 摘 要： | 采用砂培的方法研究酸性(pH值4.5)土壤下Fe2+对苜蓿生长和生理的影响。结果表明,土壤Fe2+含量在10～100 mg/kg时苜蓿生长正常,出苗率、株高、单叶面积、单株叶片数、地上及地下生物量不低于对照组(pH值6,Fe2+ 10 mg/kg);在50 mg/kg Fe2+含量下,苜蓿生长受到促进,各指标均高于或显著(P<0.05)高于其他处理;而Fe2+含量在100~200 mg/kg时,幼苗的生长受到严重抑制,出苗率、株高、叶片长度、单株叶片数、根长和地上及地下生物量均显著低于(P<0.05)其他处理;不同Fe2+含量下,苜蓿的叶片电导率、MDA含量、根系活力、可溶性糖含量,光化学效率(Fv/Fm)和光系统Ⅱ潜在活性(Fv/Fo)均存在显著差异,<100 mg/kg Fe2+含量处理下的根系活力、光化学效率(Fv/Fm)和光系统Ⅱ潜在活性(Fv/Fo)显著高于100~200 mg/kg Fe2+处理,但叶绿素含量与铁离子浓度间并不存在显著的相关性。
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| 关 键 词： | 亚铁离子 紫花苜蓿 酸性土壤 生长 |
| 收稿时间： | 1900-01-01; |
Effects of ferrous ion in an acid environment on early growth and physiology of Medicago sativa WL525 |
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| LI Jian-feng,SHI Shang-li,ZHANG Shu-qing.Effects of ferrous ion in an acid environment on early growth and physiology of Medicago sativa WL525[J].Acta Prataculturae Sinica,2009,18(5):10-17. |
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| Authors: | LI Jian-feng SHI Shang-li ZHANG Shu-qing |
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| Institution: | 1.College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China; 2.Key Laboratory of Grassland Ecosystem of Ministry of Education/Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Lanzhou 730070, China |
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| Abstract: | The effects of Fe2+ in acid soil on seeding growth and physiological index of M.sativa were studied in sand culture.M.sativa grew very well at Fe2+ concentrations of 10-100 mg/kg.The morphological items measured were rate of germination,plant height,leaf area,number of leaves per plant,and weight of shoots and roots.no less than the control group(pH 6,Fe2+ 10 mg/kg);Seedling growth was stimulated,and the physiological index of plants was higher,or significantly(P<0.05) higher than that of other treatments w... |
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| Keywords: | Fe2 Medicago sativa acid soil growth |
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