【摘要】：通過毛竹幼苗與伴礦景天間作在2 mm和5 mm土壤的盆栽試驗,探究間作對毛竹幼苗與伴礦景天生長狀況的影響,并對重金屬遷移轉(zhuǎn)運能力和其在不同部位的分布特征進行研究。結(jié)果表明:間作更適合在疏松土壤上進行;間作明顯降低了毛竹幼苗與伴礦景天的生物量,其中,在2 mm土壤中間作的伴礦景天地下部生物量下降了85.9%,在5 mm土壤中間作的毛竹幼苗莖、葉生物量顯著下降了75.5%和64.3%;間作減弱了毛竹幼苗根部對重金屬的吸收轉(zhuǎn)運能力,使伴礦景天根部Zn與Cd的轉(zhuǎn)運能力形成競爭,但有效促進了毛竹幼苗與伴礦景天體內(nèi)重金屬由根向地上部的運輸;間作能夠增加伴礦景天Cd和Zn的積累量,降低毛竹幼苗體內(nèi)Cu、Cd和Zn的積累量。可見,毛竹幼苗與伴礦景天間作對Cu、Cd和Zn的轉(zhuǎn)運積累起到了一定的促進作用,但也在一定程度上抑制了植株生長。
[Abstract]:Pot experiment was conducted between Phyllostachys pubescens seedlings and Dioscorea pubescens in 2 mm and 5 mm soil to investigate the effects of intercropping on the growth of Phyllostachys pubescens seedlings and Sedum. The migration and transport ability of heavy metals and the distribution characteristics of heavy metals in different parts were studied. The results showed that intercropping was more suitable for loose soil, and intercropping significantly decreased the biomass of Phyllostachys pubescens seedlings and Dioscorea pubescens. The underground biomass of Dianjingtian in 2 mm soil decreased by 85.9%, the leaf biomass of Phyllostachys pubescens seedlings intercropping in 5 mm soil decreased significantly by 75.5% and 64.3%, and the intercropping decreased the absorption and transport capacity of heavy metals in the roots of Phyllostachys pubescens seedlings. The transport ability of Zn and Cd in the root of Jingtian was competitive, but it promoted the transport of heavy metals from root to ground in the seedlings of Phyllostachys pubescens, and the accumulation of Cd and Zn was increased by intercropping. The accumulation of Cu,Cd and Zn in Phyllostachys pubescens seedlings was decreased. It can be seen that the intercropping between Phyllostachys pubescens seedlings and Caijingtian played a certain role in promoting the transport and accumulation of Cu,Cd and Zn, but also inhibited the plant growth to a certain extent.
【作者單位】： 浙江農(nóng)林大學亞熱帶森林培育國家重點實驗室;浙江農(nóng)林大學環(huán)境與資源學院浙江省土壤污染生物修復重點實驗室;浙江誠邦園林股份有限公司;溫嶺市環(huán)境保護局;
【基金】：國家自然科學基金(31670617) 浙江省科技廳重點研發(fā)項目(2015C03020-2)
【分類號】：X173
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本文編號：2287050