持续极端高温干旱天气对大花萱草生长的影响  

Effects of continuous extreme hot and drought weather on Hemerocallis hybridus growth

作　　者：赵天荣 徐志豪 张晨辉 王建军 沈岚 施永泰 倪建刚 

机构地区：[1]宁波市农业科学研究院,浙江宁波315040 [2]宁波市北仑区气象局,浙江宁波315807 [3]宁波市林业局林特种苗繁育中心,浙江宁波315040

出　　处：《草业科学》2015年第2期196-202,共7页Pratacultural Science

基　　金：宁波市科技攻关项目(2013C10006);国家星火项目(2014GA701015);宁波市特派员团队项目(2014C80059);宁波市农科教结合项目(2012NK39)

摘　　要：2013年夏天宁波遭遇60年来最高气温,持续时间较长且干旱少雨,本研究对宁波天气情况、18份大花萱草(Hemerocallis hybridus)材料的受害情况及其受害后的恢复情况等进行了记载观察。持续高温干旱的情况下大花萱草材料在田间表现存在较大差异,耐高温干旱能力强的材料生长未受影响,耐受性较弱的材料叶片出现枯黄萎蔫。经过筛选,以生长状况、热害指数、越夏成活率、整体姿态、叶色、观赏价值作为耐热性田间鉴定有效指标。并利用灰色关联分析法对田间的18份大花萱草材料进行了耐热性鉴定。结果表明,X16、X8、X11和X15耐热性较强,与理想耐热品种的关联度超过0.9,适合在宁波地区推广栽培;耐热性较差的材料X1、X18和X12,因其恢复较快,可以以林下地被花卉的形式进行配置和应用。In the summer of 2013,Ningbo suffered the highest temperature in 60 years which lasted for long time associated with the drought.The injury degree and recovery situation of 18 Hemerocallis hybridus accessions under this weather conditions were recorded and the heat resistance of these germplasm were evaluated by gray-correlation analysis.There were difference between the field performance of different H.hybridus accessions under this continuous heat and drought.The growth of the accessions with strong heat and drought resistance were not affected by this weather.The growth of the accessions with weak heat and drought resistance were affected and performed yellow and wilt leaves.The indices included the growth,summer survival rate,overall posture,heat injury index,leaf color and ornamental value were selected as evaluation indices of heat resistance.The result showed that the accessions of X16,X8,X11 and X15had stronger heat resistance.Their correlation degrees with the ideal species were over 0.9which were suitable for cultivation and population in Ningbo area.The accessions of X1,X18 and X12had weak heat resistant which were suitable for understory flowers as their faster recovery.

关 键 词：萱草 耐热性鉴定 热害指数 灰色关联分析 

分 类 号：S682.19[农业科学—观赏园艺]