10个树种耐水淹能力的比较

以黄连木(Pistacia chinensis)、石楠(Photinia serrulata)、蓝果树(Nyssa sinensis)、薄壳山核桃(Carya illinoen-sis)、榉树(Zelkova papyrifera)、一球悬铃木(Platanus occidentalis)、白蜡(Fraxinus chinensis)、乌桕(Sapium sebiferum)、墨西哥落羽杉(Taxodium macronatum)、花叶杞柳(Salix integracv.Hakuro Nishiki)等10种树种为研究对象,在人工控制的淹水条件下,观察其叶形态受害程度,运用涝害指数方法分别研究各树种的耐水淹能力。结果表明:淹水胁迫下,黄连木、石楠、榉树、薄壳山核桃、蓝果树、一球悬铃木涝害指数达到0.90的时间分别在10,20,25,35,40,50 d左右;乌桕、白蜡水淹50 d涝害指数分别为0.54和0.80,耐涝性明显;墨西哥落羽杉和花叶杞柳受水淹60 d内无明显受害现象。乌桕、白蜡、墨西哥落羽杉、花叶杞柳等树种水淹后茎基部能产生不定根和皮孔,是对淹水胁迫的积极适应,可作为河岸带绿化的备选树种。

The comparison of waterlogging resistance of 10 trees

The effects of waterlogging stress were investigated on 10 tree species(Pistacia chinensis,Photinia serrulata,Nyssa Sinensis,Carya illinoensis,Zelkova schneideriana,Platanus occidentalis,Fraxinus chinensis,Sapium sebiferum,Taxodium macronatum and Salix integra.cv.Hakuro Nishiki').The results showed that under waterlogging stress,for Pistacia chinensis,Photinia serrulata,Nyssa sinensis,Carya illinoensis,Zelkova schneideriana and Platanus occidentalis,the time for waterlogging index to reach 0.90 was 10,20,25,35,40 and 50 days respectively;the indexes of Sapium sebiferum and Fraxinus chinensis were 0.45 and 0.80 after 50 days;Taxodium macronatum and Salix integra Hakuro Nishiki' had no obvious change in 60 days. It was concluded that the adventitious rooting and aerenchyma development of trees are an adaptive mechanism to waterlogging stess,so Fraxinus chinensis,Sapium sebiferum,Taxodium macronatum and Salix integra cv.Hakuro Nishiki' may be the alternative trees which can green river banks.