西北植物学报2024，Vol.44Issue(3)：353-361,9.DOI:10.7606/j.issn.1000-4025.20230618
平茬对四翅滨藜补偿生长及水分生理特征的影响
Compensatory growth and water physiological characteristics of Atriplex canescens under stubble treatment
摘要
Abstract
[Objective]Atriplex canescens is a high-quality xerophytic shrub widely introduced in desertifi-cation control areas,and stubble is a main management measure for desertification control.Revealing the adaptability and compensatory growth mechanism in the recovery process after stubble can provide theoret-ical support for developing A.canescens into a high-quality feed in desert areas.[Methods]In this study,5-year-old A.canescens plants were used as object.Through stubble treatment,plant height,crown width,photosynthetic reaction,leaf water potential,leaf hydraulic conductivity,and water use efficiency were measured during the recovery process of A.canescens,and the relationship between functional traits was discussed.[Results](1)The plant height,crown width,and aboveground biomass of A.canescens after stubble were recovered to the pre-stubble state after a growing season.(2)The leaf water potential,leaf hydraulic conductivity,water use efficiency,and photosynthetic parameters of the stubble plants were higher than those of the control plants.(3)Linear fitting analysis showed that the midday leaf water po-tential and stomatal conductance of the stubble plants were significantly positively correlated with the growth rate.[Conclusion]A.canescens had good compensatory growth ability after stubble.In the early stage of recovery growth,the flat stubble plants showed higher compensatory growth ability and typical acquisition strategy,and then turned to conservative strategy with the decrease of hydraulic condition in the later stage.Stubble plants allocated more biomass and resource to the growth of aboveground parts such as branches and leaves,and the later resource allocation turned to the growth of underground parts.关键词
四翅滨藜/平茬/补偿生长/水分生理/生态适应Key words
Atriplex canescens/stubbling/compensatory growth/water physiology/ecological adaption分类
农业科技引用本文复制引用
马帅,周海,种培芳,任珩,冯相艳..平茬对四翅滨藜补偿生长及水分生理特征的影响[J].西北植物学报,2024,44(3):353-361,9.基金项目
国家自然科学基金项目(32171876) （32171876）
内蒙古自治区科技计划项目(2021GG0053) （2021GG0053）
甘肃省优秀博士项目(23JRRA627) （23JRRA627）
