Qi Lin, Qin Xiaoliang, Li Feng-Min, Siddique Kadambot H M, Brandl Helmut, Xu Jinzhang, Li Xiaogang
a State Key Laboratory of Grassland Agroecosystems, Institute of Arid Agroecology, School of Life Science , Lanzhou University , Lanzhou , China.
Int J Phytoremediation. 2015;17(1-6):264-71. doi: 10.1080/15226514.2014.898016.
The main objective of this study was to investigate the accumulation and distribution of strontium (Sr) in 26 cultivars of wheat (Triticum aestivum L.), husk oat (Avena sativa L) and naked oat (Avena nuda), and barley (Hordeum vulgare L.) for their potential use in phytoremediation.Sr levels had no effect on the accumulation of shoot biomass at tillering or at maturity. Mean shoot Sr concentration of naked oat and barley at tillering was significantly (P<0.05) higher than that of wheat; Neimengkeyimai-1, a naked oat cultivar, had the highest Sr concentrations. At maturity, of four naked oat cultivars, Neimengkeyimai-1 had the highest Sr content at all measured Sr levels. Leaves had the highest Sr concentrations, followed by roots and straw, and then grain with the lowest. Mean enrichment coefficients from soil to shoots ranged from 0.521 to 1.343; the percentage of stable Sr removed from the soil to the shoots at harvest time was more than 1.4% after 120 days. Neimengkeyimai-1 could be used as a model for further research to find more effective cultivars; and naked oat plants could be selected for phytoremediation to clean up contaminated soil.
本研究的主要目的是调查26个小麦（普通小麦）、皮燕麦、裸燕麦和大麦品种中锶（Sr）的积累和分布情况，以评估其在植物修复中的潜在用途。锶水平对分蘖期或成熟期地上部生物量的积累没有影响。分蘖期裸燕麦和大麦地上部的平均锶浓度显著高于小麦（P<0.05）；裸燕麦品种内蒙科麦-1的锶浓度最高。成熟期，在所有测量的锶水平下，四个裸燕麦品种中内蒙科麦-1的锶含量最高。叶片的锶浓度最高，其次是根和秸秆，籽粒的锶浓度最低。从土壤到地上部的平均富集系数在0.521至1.343之间；120天后收获时，从土壤转移到地上部的稳定锶百分比超过1.4%。内蒙科麦-1可作为进一步研究以寻找更有效品种的模型；可以选择裸燕麦植株用于植物修复以清理受污染土壤。
