柳枝稷苗期对氮素胁迫耐受性的综合评价  

Comprehensive Evaluation of Tolerance of Switchgrass to Nitrogen-deficiency Stress at Seedling Stage

作　　者：朱毅[1] 范希峰[1] 武菊英[1] 侯新村[1] 李钰莹[1] 赵春桥[1] 

机构地区：[1]北京市农林科学院北京草业与环境研究发展中心,北京100097

出　　处：《中国草地学报》2013年第4期66-70,75,共6页Chinese Journal of Grassland

基　　金：北京市农林科学院科技创新能力建设专项(KJCX201102005;KJCX201101003;KJCX201103001);北京市农林科学院青年科研基金(QNJJ201019)

摘　　要：为明确柳枝稷在缺氮处理下的耐受能力从而筛选出优质的种质资源,以13份柳枝稷种质为供试材料,在人工气候室中进行水培试验,通过相关农艺性状和生理指标等评价指标的测定,采用标准差系数赋予权重法对柳枝稷在胁迫下的表现做综合评价。结果表明:氮素胁迫对13个不同柳枝稷种质的总生物量、根长、净光合速率、叶绿素含量、叶表面积等指标具有显著抑制作用。标准差系数赋予权重法得出的各材料耐氮胁迫性依次为:BJ-4>BJ-3>Forestburg>Pathfinder>BJ-5>Blackwell>BJ-2>Kanlow>Alamo>Cave-In-Rock>BJ-1>Trailblazer>BJ-6,评价结果与实际观测结果基本一致。To reveal the effects of nitrogen-deficiency stress on the biomass,agronomic traits and physiological indexes of switchgrass and to obtain the new germplasm with best tolerance,13 switchgrasses were treated under nitrogen-deficiency in hydroponics in artificial climatic chamber.The comprehensive evaluation was made through the analysis of evaluation indexes with the standard deviation coefficient allocation weighed method.The results showed that the nitrogen-deficiency stress had exerted significantly inhibitory effects on the agronomic traits and physiological characteristics of switchgrass.The resistance of 13 switchgrasses from strong to weak was as follows： BJ-4,BJ-3,Forestburg,Pathfinder,BJ-5,Blackwell,BJ-2,Kanlow,Alamo,Cave-In-Rock,BJ-1,Trailblazer and BJ-6 according to standard deviation coefficient allocation weighed method.

关 键 词：柳枝稷 氮素胁迫 标准差 权重法 

分 类 号：S216.2[农业科学—农业机械化工程]