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赤桉(Eucalyptus camaldulensis)分布于沃大利亚干旱炎热的地区,该树种具有特别高的根茎比率,Jacobs(1955)认为这种特性有助于赤桉能在干旱环境下成功地定植。选取六种不同产区的赤桉以及柳桉(E.saligna)和弹丸桉(E.pilularis)设置在与自然环境相类似的条件下作试验,把种子播种在水份饱和的土壤上发芽,随后持续干旱,逐渐使土壤剖面干透,在剖面上研究其根系增长情况。试验结果表明,赤桉能够在迅速干旱的土壤剖面上成功定植,主要是由于具有迅速产生大量根系的能力。试验还显示出,来自维多利亚默里河流域阿尔巴库湖和纳萨利亚湖的赤桉,在干旱环境下比其他地区的生长得更快。
Eucalyptus camaldulensis, located in arid and hot regions of the country, has a particularly high ratio of rhizomes, which Jacobs (1955) considered as contributing to the successful colonization of E. grandis under drought conditions. Eucalyptus urophylla, E. saligna and E. pulaularis from six different regions were selected and tested under conditions similar to the natural environment. The seeds were sown in water-saturated soil to germinate, Subsequent drought continued to gradually dry the soil profile and study its root growth in the profile. The results of the experiment showed that Eucalyptus grandis could be successfully colonized on a rapidly arid soil profile due to its ability to rapidly produce large amounts of root system. Trials also showed that Eucalyptus globulus from Lake Albuquerque and Lake Nasari Lake in the Murray River, Victoria, grew faster than the rest of the world in arid environments.