四翅滨藜引种试验

Introduction Experiment of Atriplex canescens

对引种的四翅滨藜(Atriplex canescens)树形(分成匍匐型、半匍匐型、直立型)、树高、地径、分枝数与冻害程度进行多元回归分析,确定了树形是影响其冻害程度的主要因子。因此可判定,四翅滨藜在半干旱地区引种产生冻害的主要原因是春季风大,易产生生理干旱;匍匐型的由于贴近地面,受风小,冻害程度最轻,大部分可在试验地越冬;直立型的冻害程度最高。同时,对四翅滨藜的耐旱性、耐盐碱性及在试验地的生物量、物候等进行了系统测定,为今后高寒风沙、盐碱地区引种四翅滨藜提供了借鉴。

A multivariate regression analysis was performed to determine a suitable model for predicting the relationships between tree form （prostrate type, semi-prostrate type and erect type）, tree height, basal diameter, branching number and freezing injury using the introduced Atriplex canescens as experimental materials. Result showed that tree form is the main factor influencing freezing injury. The reason of the introduced A. caneseens suffering from freezing injury in semi-arid areas is the strong spring winds, which result in physiological drought. The freezing injury of A. caneseens of prostrate type is the slightest and can survive over the winter, while that of A. canescens with erect type is the most serious. Moreover, the drought resistance, salt and alkaline tolerance, biomass and phenophase of A. eaneseens were determined aiming to provide some references for the introduction of A. canescens in saline-alkaline areas.