Giachetti Giorgio, Sebastiani Luca
Scuola Superiore S. Anna di Studi Universitari e Perfezionamento-BioLabs, Polo S. Anna Valdera, Viale Rinaldo Piaggio 34, I-56025 Pontedera, Italy.
Chemosphere. 2006 Jun;64(3):446-54. doi: 10.1016/j.chemosphere.2005.11.021. Epub 2006 Jan 5.
In this study the effects of different levels of industrial wastes on growth traits and metal accumulation in aerial portions were determined for Populusxeuramericana clone I-214. The experiment started in April 2003. Scions of Populusxeuramericana clone I-214, were grown outdoor near Pisa (Italy), in lisimeters filled with soil naturally present in the land around the experimental site, were daily drip irrigated, hand weeded, monthly fertilized, pruned for a unique shoot and cultivated with four increasing treatments: soil non-amended, soil amended with 4.8 kgm(-2), with 9.6 kgm(-2) and with 19.2 kgm(-2) of fresh tannery waste. The climatic parameters were daily recorded throughout the whole experiment. Growth relieves were performed during the growing season. After six months since the plantation of the scions, aerial portions of every plant were harvested for biomass and metal content analyses. Data demonstrated that the waste exerted beneficial effects on poplars mainly through a general increase of growth traits and that the nutrients relocation is the mechanisms involved in modulating growth rate. The concentration and the amount of the mineral elements analysed (N, P, K, Na, Ca, Mg, S, B, Fe, Mn, Cu, Zn, Cr) changed determinately among treatments, organs and position. We concluded that phytoremediation strategies of tannery wastes might be possible and sustainable for polar plantations in soil amended with non-hazardous levels of industrial waste, which maintain total heavy metals concentration close to background values.
在本研究中，测定了不同水平的工业废弃物对欧美杨无性系I-214地上部分生长性状和金属积累的影响。实验于2003年4月开始。欧美杨无性系I-214的接穗种植在意大利比萨附近的室外，种植于装有实验场地周围土地中天然存在的土壤的蒸渗仪中，每天进行滴灌、人工除草、每月施肥，修剪成单枝，并进行四种递增处理：未改良土壤、用4.8 kg·m⁻²、9.6 kg·m⁻²和19.2 kg·m⁻²新鲜制革厂废弃物改良的土壤。在整个实验过程中每天记录气候参数。在生长季节进行生长缓解处理。接穗种植六个月后，收获每株植物的地上部分进行生物量和金属含量分析。数据表明，废弃物主要通过总体上增加生长性状对杨树产生有益影响，并且养分重新分配是调节生长速率的机制。所分析的矿质元素（N、P、K、Na、Ca、Mg、S、B、Fe、Mn、Cu、Zn、Cr）的浓度和含量在处理、器官和位置之间有显著变化。我们得出结论，对于在添加无害水平工业废弃物的土壤中种植杨树而言，制革厂废弃物的植物修复策略可能是可行且可持续的，这种策略能使总重金属浓度保持在接近背景值的水平。
