Acta Agrestia Sinica

›› 2008, Vol. 16 ›› Issue (3): 298-302.DOI: 10.11733/j.issn.1007-0435.2008.03.017

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Effect of the Burying Depth of Underground Drip Irrigation System on Alfalfa Growth Characteristics

XIA Yu-hui1, WANG You-ke1,2, WANG Zhi-tong 3   

  1. 1. College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
    2. National Engineering Research Center for Water Saving Irrigation, Yangling, Shaanxi Province 712100, China;
    3. Zongbieli Animal Epidemic Prevention Station, Alxa Left Banner, Inner Mongolia Autonomous Region 750306, China
  • Received:2007-10-31 Revised:2008-02-27 Online:2008-06-15 Published:2008-06-15

地下滴灌埋设深度对紫花苜蓿生长的影响

夏玉慧1, 汪有科1,2, 汪治同3   

  1. 1. 西北农林科技大学资源与环境学院, 陕西, 杨凌, 712100;
    2. 国家节水灌溉杨凌工程技术研究中心, 陕西, 杨凌, 712100;
    3. 内蒙古阿拉善左旗宗别立动物防疫站, 内蒙古, 阿左旗, 750306
  • 通讯作者: 汪有科
  • 作者简介:夏玉慧(1981- ),女,内蒙古赤峰人,硕士研究生,研究方向为水土资源高效利用,E-mail:xiayuhui814@tom.com
  • 基金资助:
    陕西省重大科技攻关项目(2006Kz08-G3)

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Abstract: In order to provide theoretical basis to the forage planting with drip irrigation,the effect of burying depth of drip irrigation system was studied on the growth characteristics,including plant height,root collar diameter,branch number per plant,main root length,weight density and yield,of Medicago sativa L.cv.Golden Empress.The results show that plant height and root collar diameter under the 10 cm burying depth treatment was significantly higher than those under other treatments in branching stage(P<0.05),while in flowering stage,the 30 cm depth treatment was significantly higher than that of other treatments(P<0.05).No significant effect of burying depth on the number of branches was detected.During branching stage,the 10 cm burying depth treatment had the highest yield,however the yield under 20 cm and 30 cm burying depth treatments were increased step by step and even exceeded the 10 cm treatment since the flowering stage.There was no significant effect of burying depth on the growth of main root,but the lateral root density increased at each burying depth of drip tape.

Key words: Underground drip irrigation, Burying depth, Alfalfa growth characteristics

摘要： 研究不同滴灌带埋设深度对紫花苜蓿金皇后(Medicago sativa L. cv. Golden Empress)的株高、茎粗、分枝数、根系和产量等指标的影响,以期为滴灌在人工牧草种植应用提供理论依据.结果表明:株高和茎粗两指标,在分枝期,埋深10 cm显著高于其它处理(P<0.05);开花期以后,埋深30 cm显著高于其它处理(P<0.05);不同埋深处理分枝数差异不显著;分枝期埋深10 cm产量最高,开花期以后埋深为20和30 cm产量逐渐提高甚至超出10cm滴灌处理;不同埋设深度对主根生长影响不大,但每个滴灌带埋深处的侧根密度增加.

关键词: 地下滴灌, 埋设深度, 苜蓿生长特性

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