Cadmium phytoremediation potential of napiergrass cultivated in Kyushu, Japan.
Cadmium phytoremediation potential of napiergrass cultivated in Kyushu, Japan.
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日本九州种植的龙胆草的镉植物修复潜力。
DOI：
10.1155/2015/756270
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发表时间：
2015
影响因子：
2.2
通讯作者：
and Aya Nishiwaki
中科院分区：
文献类型：
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作者：
Yasuyuki Ishii;Kotomi Hamano;Dong-Jin Kang;Sachiko Idota;and Aya Nishiwaki
象草（Pennisetum purpureumSchumach）是一种C4热带植物，由于其干物质生产力高，在九州低海拔地区可持续数年，并且受严重害虫的危害小，因此一直被用作饲料。最近，这种草由于其作为生物乙醇原料和植物修复的潜力而受到关注。在镉（Cd）污染的土壤中，在两种切割频率下，将Napiergrass栽培品种Wruk Wona作为一年生作物种植。刈割次数对牧草年干物质产量影响不显著，但刈割2次后，牧草对Cd的吸收和富集量均高于刈割1次，这是由于刈割2次后牧草中Cd含量较高所致。因此，一年两次刈割可使土壤Cd含量降低4.6%。
Napiergrass (Pennisetum purpureumSchumach), a C4tropical species, has been used for forage since it has high dry matter productivity, sustainability over several years in low‐altitudinal sites of Kyushu, and little damage from serious pests. Recently, this grass has gained attention due to its potential as a bioethanol feedstock and for phytoremediation. Napiergrass cultivar Wruk Wona was grown as an annual crop in cadmium‐ (Cd‐) contaminated soils under two cutting frequencies. Annual dry matter yield was not affected significantly by cutting frequency, but the concentration and uptake of Cd were higher when cut twice rather than only once, due to high Cd content of the herbage from the second cutting. Therefore, the soil Cd concentration was reduced by 4.6% when managed by cutting twice in a single year of Napiergrass cultivation.