Dimitriou Ioannis, Aronsson Pär, Weih Martin
Department of Short Rotation Forestry, Swedish University of Agricultural Sciences, P.O. Box 7016, S-75007 Uppsala, Sweden.
Bioresour Technol. 2006 Jan;97(1):150-7. doi: 10.1016/j.biortech.2005.02.004. Epub 2005 Mar 31.
Short-rotation willow (Salix sp.) coppice, a commercial crop grown for energy purposes, is used for phytoremediation of landfill leachate in Sweden. However, the leachate's chemical composition can cause plant damage mainly due to high NaCl and NH4 concentrations. A pot experiment was conducted in order to quantify the growth responses of five different willow clones ("78-183", "Jorr", "Loden", "Olof", "Tora") to irrigation with different leachate mixtures (corresponding to 240, 180, and 120 mg Cl l(-1)) and to assess the applicability of leaf length and leaf fluctuating asymmetry as stress indicators. A series of plant traits (shoot, root and leaf dry weight, leaf area, leaf length and leaf fluctuating asymmetry) were measured. The irrigation with leachate resulted in reduced relative growth rates but there were no clear differences between the different concentrations. The clones "Jorr" and "Loden" performed best in terms of differences in relative growth rate between control and leachate treatments. Leaf length appeared to be a useful stress diagnostic tool for use in situ showing a high correlation to growth, whereas fluctuating asymmetry showed no such correlation. Higher N, lower P and higher Na concentrations in plant stems treated with leachate than control plants were observed.
短轮伐期柳树（柳属）矮林是一种用于能源目的的经济作物，在瑞典被用于垃圾渗滤液的植物修复。然而，渗滤液的化学成分主要由于高氯化钠和铵浓度会对植物造成损害。进行了一项盆栽试验，以量化五个不同柳树无性系（“78 - 183”、“乔尔”、“洛登”、“奥洛夫”、“托拉”）对不同渗滤液混合物灌溉（对应240、180和120毫克氯升⁻¹）的生长反应，并评估叶长和叶波动不对称性作为胁迫指标的适用性。测量了一系列植物性状（地上部、根部和叶片干重、叶面积、叶长和叶波动不对称性）。用渗滤液灌溉导致相对生长速率降低，但不同浓度之间没有明显差异。就对照和渗滤液处理之间的相对生长速率差异而言，“乔尔”和“洛登”无性系表现最佳。叶长似乎是一种有用的原位胁迫诊断工具，与生长高度相关，而波动不对称性则没有这种相关性。观察到用渗滤液处理的植物茎中氮含量较高、磷含量较低且钠浓度高于对照植物。
