Zalesny Jill A, Zalesny Ronald S, Wiese Adam H, Hall Richard B
Department of Natural Resource Ecology and Management, Iowa State University, Ames, Iowa, USA.
Int J Phytoremediation. 2007 Nov-Dec;9(6):513-30. doi: 10.1080/15226510701709754.
Information about the response of poplar (Populus spp.) genotypes to landfill leachate irrigation is needed, along with efficient methods for choosing genotypes based on leachate composition. Poplar clones were irrigated during three cycles of phyto-recurrent selection to test whether genotypes responded differently to leachate and water, and to test whether the methodology had merit as a tool for plant selection during remediation. Fifteen below- and above-ground traits were evaluated. Twenty-five clones were tested in cycle 1, while the best l2 genotypes were evaluated in cycles 2 and 3. Eight clones were selected and subsequently tested in an in situ landfill study (cycle 4). Results from cycles 1, 2, and 3 are presented here. Overall, clones responded differently to irrigation treatments, with certain genotypes exhibiting better below- and above-ground growth with water than leachate. However, growth was greater with leachate irrigation for some clones. In addition, differences between treatments within clones decreased with days after planting (DAP). There were no treatment differences for number of leaves, height, and root length at the end of cycle 2 (45 DAP) or cycle 3 (30 DAP). These results detail the extensive variation in clonal responses to leachate irrigation, along with the need and efficacy of using phyto-recurrent selection to choose superior genotypes.
我们需要了解杨树（Populus spp.）基因型对垃圾渗滤液灌溉的响应信息，以及基于渗滤液成分选择基因型的有效方法。在三个植物轮回选择周期中对杨树无性系进行灌溉，以测试基因型对渗滤液和水的反应是否不同，并测试该方法作为修复过程中植物选择工具是否具有价值。评估了15个地上和地下性状。在第1轮测试了25个无性系，而在第2轮和第3轮评估了最佳的12个基因型。选择了8个无性系，随后在原位垃圾填埋场研究中进行测试（第4轮）。这里展示了第1轮、第2轮和第3轮的结果。总体而言，无性系对灌溉处理的反应不同，某些基因型在用水灌溉时地上和地下生长情况比用渗滤液时更好。然而，对于一些无性系来说，渗滤液灌溉时生长量更大。此外，随着种植后天数（DAP）的增加，无性系内处理之间的差异减小。在第2轮（45 DAP）或第3轮（30 DAP）结束时，叶片数量、高度和根长方面没有处理差异。这些结果详细说明了无性系对渗滤液灌溉反应的广泛差异，以及使用植物轮回选择来选择优良基因型的必要性和有效性。
