| 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： | 甘肃农业大学草业学院,甘肃,兰州,730070;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１０～１００ｍｇ／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+ １０ｍｇ／ｋｇ）；在５０ｍｇ／ｋｇFe2+ 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１００～２００ｍｇ／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，＜１００ｍｇ／ｋｇFe2+ 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１００～２００ｍｇ／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: | LI Jian-feng1,2,SHI Shang-li1,ZHANG Shu-qing1,2 (1.College of Grassl, Science,Gansu Agricultural University,Lanzhou 730070,China,2.Key Laboratory of Grassl, Ecosystem of Ministry of Education/Sino-U.S.Centers for Grazing L, Ecosystem Sustainability,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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