Remediation of Radiocesium-137 Affected Soil Using Napiergrass Under Different Planting Density and Cutting Frequency Regimes
Remediation of Radiocesium-137 Affected Soil Using Napiergrass Under Different Planting Density and Cutting Frequency Regimes
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不同种植密度和刈割频率条件下使用龙胆草修复放射性铯137影响的土壤
DOI:
10.1007/s11270-017-3444-z
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Tokonami Shinji
中科院分区:
文献类型:
--
作者:
Kang Dong-Jin;Ishii Yasuyuki;Tazoe Hirofumi;Isobe Katsunori;Higo Masao;Hosoda Masahiro;Yamada Masatoshi;Tokonami Shinji
This study investigated the use of napiergrass (Pennisetum purpureumSchum.) to remediate soils highly contaminated with radiocesium-137 (137Cs) in the town of Namie, Fukushima Prefecture, which is located around 9 km northwest of the Fukushima Daiichi Nuclear Power Plant, Japan. Field experiments were performed to investigate the remediation effects using two sites (paddy or upland grassland) as replicates, three planting densities (low, medium, and high density), and two different cutting frequencies (cut once or twice a year) over 2 consecutive years. Napiergrass can be more efficient than sorghum for137Cs remediation. The maximum137Cs removal ratio (CR, %) in napiergrass achieved with high-density planting (11 plants m−2) was between 0.32 and 0.57%. However, cutting frequency did not affect the CR. Higher biomass leads to a dilution of137Cs in cutting frequency. Therefore, we suggest that the greatest CR could be achieved through a high above ground biomass (high-density planting).
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