干旱脅迫對苜蓿斑蚜生長發(fā)育及繁殖的影響

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關鍵詞：干旱脅迫；首蓿斑蚜；生長發(fā)育；繁殖；種群增長

中圖分類號：S435.4 文獻標識碼：A 文章編號：1002-204X（2025）04-0038-06

doi：10.3969/j.issn.1002-204x.2025.04.007

Effects of Drought Stress on Growth， Development and Reproduction of Therioaphis trifolii

Wang Ying'， Zhou Wenqi2， Wei Shuhual， Zhang Rongl*，Ban Liping2， Yin Xuewei2 （1.Institute ofPlantProtection，Ningxia AcademyofAgricultureand Forestry Sciences，Yinchuan，Ningxia 750002; 2.College of Grassland Science and Technology， China Agricultural University，Beijing 100193）

AbstractInorder to clarifytheadaptabilityof Therioaphis trifoliitodroughtstressandexplore thecorrelation ofTherioaphis trifolii and its host with drought stress，the effects of drought stress on growth，reproduction and population growthof Therioaphis trifolii werestudiedbyusing weighingmethod，andthe morphological indexof alfalfaseedlingsunderdiferent drought stress treatmentsweremeasured.Theresultsshowed thatthe reproduction of Therioaphis trifoliicouldbe maintainand even promotedunder moderate drought stress，and theaphidyield was5.6O.Under milddrought stress，thepopulationof Therioaphis trifoliicould be maintained and promoted，and the net reproductive rate was9.42.With the increaseof drought stressdays，the population numberof Therioaphistrifoliiincreased firstand thendecreased.Theleaf length，leaf width，leaf areaandroot lengthof alfalfa increased first and then decreased with the increase ofdrought stressThe GAMcurve showed thatwith theincreaseof drought stress，theyieldofTherioaphistrifoliishowedanonlinear trend，and ithad relatively strong adaptabilitytomildand moderate drought stress.With the increase of droughtstress，alfalfa leaf length，leaf width，plantheight，rot lengthandabovegroundbiomassdecreased significantly.Theanalysis showsthatdrought stress isnot conducive to the growth of alfalfa，but moderate drought canpromote the growth，reproductionandpopulationgrowthofaTherioaphistrifolii.Thisstudylaida foundation forthefuture studyof the interaction betweenalfalfa，Therioaphis trifolii andenvironmental factorsunder drought stres，and provided an important basis for forecasting and effective prevention and control of Therioaphis trifolii. Key Words Drought stress; Therioaphis trifoli; Growth and development;Reproduction; Population growth

紫花苜蓿（Medicagosativa）是豆科多年生牧草，因其固氮能力強，蛋白質(zhì)含量高，營養(yǎng)物質(zhì)豐富，適口性好，被譽為“牧草之王”，是我國栽培面積最大的飼草作物之一[1-2]。（剩余7066字）