土壤涝渍对杨树和柳树苗期生长及生理性状影响的研究

研究了两种杨树无性系（ＮＬ８０１０５、ＮＬ８０３５１）和柳树在土壤涝渍条件下的生长及生理性状．结果表明，在涝渍胁迫下苗木根系数量减少，根系长度缩短，根活力下降；高生长降低；最终生物量明显减小；叶片气孔对涝渍胁迫有较强反应，叶片中硝酸还原酶（ＮＲ）活性也会受到一定影响．柳树与杨树之间存在较大差异，无论从生长还是生理性状看，杨树不如柳树耐涝．

Influence of soil waterlogging on growth and physiological properties of poplar and willow seedlings.

Studies with the seedlings of two poplar clones (NL 80105,NL 80351) and willow show that under soil waterlogging, the root number was decreased, root length was shortened, root activity was declined, height growth became slow, and correspondingly, the biomass was decreased. Leaf stomas had a strong response to waterlogging stress, which affected the activity of nitrate reductase in leaves. Willow had a stronger waterlogging resistance than poplar, no matter on growth or on physiological properties.