| 沙打旺黄矮根腐病在我国北方5省区的分布与危害 |
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| 引用本文： | 李彦忠,南志标,张志新,刘永儒,高兴业,郑健勋.沙打旺黄矮根腐病在我国北方5省区的分布与危害[J].草业学报,2011,20(2):39-45. |
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| 作者姓名： | 李彦忠 南志标 张志新 刘永儒 高兴业 郑健勋 |
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| 作者单位： | 1.兰州大学草地农业科技学院,甘肃 兰州 730020;2.陕西省榆林市横山县草原工作站,陕西 横山 719100;3.甘肃省环县滩羊育种场,甘肃 环县 745700 |
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| 基金项目： | 973项目(2007CB108902); 甘肃省自然科学基金(2008GS01143); 国家牧草现代化农业产业技术体系建设共同资助 |
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| 摘 要： | 对5省(区)沙打旺主产区进行了病害调查,除辽宁建平之外,沙打旺黄矮根腐病在甘肃环县、宁夏盐池、陕西横山、内蒙松山和敖汉均有发生,发病率为5.7％～82.6％,病情指数为2.7~53.7。各级严重度的植株在病株中的比例因调查地点而异。与健康植株比较,病株枝条数增加16.7％～63.7％,但单株干重下降8.5％～32.9％。各地的植株密度、牧草产量、平均枝条数和单株干重均存在一定差异,其中在发病率最高的甘肃环县,植株密度、牧草产量分别与发病率和严重度均呈显著负相关(P<0.01)。对影响发病率的因素进行了分析讨论,提出了防治该病的建议。
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| 关 键 词： | 病情指数 草地利用年限 草地衰退 发病率 牧草产量 沙打旺埃里砖格孢 病害严重度 植株密度 |
| 收稿时间： | 1900-01-01; |
Distribution of and damage caused by yellow stunt and root rot of Astragalus adsurgens in five northern provinces of China |
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| LI Yan-zhong,NAN Zhi-biao,ZHANG Zhi-xin,LIU Yong-ru,GAO Xin-ye,ZHEN Jian-xun.Distribution of and damage caused by yellow stunt and root rot of Astragalus adsurgens in five northern provinces of China[J].Acta Prataculturae Sinica,2011,20(2):39-45. |
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| Authors: | LI Yan-zhong NAN Zhi-biao ZHANG Zhi-xin LIU Yong-ru GAO Xin-ye ZHEN Jian-xun |
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| Institution: | 1.College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;2.Hengshan Grassland Work Station, Shaanxi Province, Yulin City, Hengshan 719100, China;3.Huanxian Station for Tan-sheep Breeding, Gansu Province, Huanxian 745700, China |
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| Abstract: | The survey was carried out in the main production area of standing milkvetch(Astragalus adsurgens) in five provinces of northern China.It indicated that yellow stunt and root rot of A.adsurgens occurred in Huanxian County of Gansu,Yanchhi County of Ningxia,Hengshan county of Shaanxi,Songshan Zone and Aohanqi of Inner Mongonia(except Jianping County of Liaoning province).Disease incidences were 5.7%-82.6%,and disease indexes were 2.7-53.7.The percentages of plants with the same grade of disease severity vari... |
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| Keywords: | disease index pasture life span pasture decline disease incidence forage yield Embellisia astragali plant density disease severity |
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