| 异龄苜蓿土壤浸提液对3种植物种子萌发的影响 |
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| 引用本文： | 杨倩,王希,沈禹颖.异龄苜蓿土壤浸提液对3种植物种子萌发的影响[J].草地学报,2009,17(6):784-788. |
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| 作者姓名： | 杨倩 王希 沈禹颖 |
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| 作者单位： | 农业部草地农业生态系统重点开放实验室, 兰州大学草地农业科技学院, 兰州, 730020 |
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| 基金项目： | 教育部重点科技项目，国家重点基础研究发展规划项目 |
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| 摘 要： | 采用自甘肃庆阳和定西地区不同年龄紫花苜蓿(Medicago sativa L.)土壤制备浸提液,应用纸上发芽法检测其对苜蓿、萝卜(Raphanus sativus L.)和小麦(Triticum aestivum L.)种子萌发的影响.结果表明:不同生长年龄苜蓿土壤浸提液对苜蓿种子萌发以及胚根和胚芽的抑制程度为年>3年>9年,在庆阳龄苜蓿土壤浸提液(00 g干土/L)中苜蓿发芽率下降18%,其胚芽和胚根显著受抑(P<0.0),比对照分别降低69%和80%.在平均降水391mm的定西,4年以下苜蓿土壤无明显自毒性;苜蓿秋季翻耕休闲有利于3个供试种的萌发及胚根和胚芽的生长,有效解除了年龄以上苜蓿土壤的自毒效应,苜蓿-小麦轮作系统中,苜蓿后茬小麦建植不受苜蓿毒性的影响.
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| 关 键 词： | 紫花苜蓿 土壤浸提液 自毒作用 种子萌发 |
| 收稿时间： | 2008-12-31 |
Effect of Soil Extract Solution from Different Aged Alfalfa Standings on Seed Germination of Three Species |
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| YANG Qian,WANG Xi,SHEN Yu-ying.Effect of Soil Extract Solution from Different Aged Alfalfa Standings on Seed Germination of Three Species[J].Acta Agrestia Sinica,2009,17(6):784-788. |
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| Authors: | YANG Qian WANG Xi SHEN Yu-ying |
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| Institution: | Key Laboratory of Grassland Agro-ecosystem of Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu Province 730020, China |
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| Abstract: | Alfalfa(Medicago sativa L.) is recognized as a high yield and good quality forage and playing a key role in both forage supply and food security.The autotoxicity has been reported as one of the most important factors causing low yield of succeeding alfalfa crop.A germination bioassay was conducted to determine the toxic effect of soil aqueous extracts from different aged alfalfa standings in Qingyang and Dingxi,Gansu Province on seed germination rate of alfalfa,radish(Raphanus sativus L.),and wheat(Triticum... |
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| Keywords: | Alfalfa Soil aqueous extract Autotoxicity Seed germination |
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