丝瓜与伴矿景天间作对土壤Cd形态及丝瓜Cd吸收的影响

发布时间：2018-03-02 17:39

本文选题：伴矿景天　切入点：丝瓜　出处：《农业环境科学学报》2016年12期 　论文类型：期刊论文

【摘要】：采用盆栽实验将丝瓜和超积累植物伴矿景天间作于重金属污染土壤中,并向土壤添加钙镁磷肥或向丝瓜根际添加固镉菌剂,研究间作对土壤Cd的形态及丝瓜重金属积累性的影响。结果表明,丝瓜与伴矿景天间作一定程度上减少了丝瓜的结果数量,同时存在增大丝瓜果实中Cd含量的风险;通过施加固镉菌剂或钙镁磷肥增加了丝瓜的结果数,且丝瓜果实中Cd含量均未超过国家标准的限定值。同时,景天和丝瓜对土壤Cd具有移除能力,丝瓜主要表现在茎叶对Cd的吸收,其中重污染土壤中的景天和丝瓜对土壤Cd的移除能力大于低污染土壤种植的景天和丝瓜。总体来看,丝瓜与超积累植物伴矿景天间作可用于低污染土壤进行边修复边生产。但是,由于存在较高食品安全风险,在间作的同时可采取施固镉菌剂或钙镁磷肥等措施来降低果实部分Cd含量。
[Abstract]:A pot experiment was conducted to intercropping loofah and superaccumulant plant with Jingtian in heavy metal contaminated soil, and to add calcium magnesium phosphate fertilizer to the soil or cadmium fixation agent to the rhizosphere of loofah. The effects of intercropping on the forms of CD in soil and the accumulation of heavy metals in loofah were studied. The results showed that the intercropping of loofah and Jinjingtian reduced the number of fruit of loofah to a certain extent, and there was a risk of increasing CD content in the fruit of loofah. Application of cadmium bacteria or calcium magnesium phosphate fertilizer increased the number of fruit, and the CD content in loofah fruits did not exceed the limit value of national standard. At the same time, Jingtian and Luffa gourd had the ability to remove soil CD. The absorption of CD by stems and leaves of loofah is mainly reflected in the CD removal ability of Jingtian and Luffa grown in heavily polluted soil is higher than that of Jingtian and Luffa grown in low pollution soil. The intercropping of loofah and superaccumulant plants can be used for remediation and production of low-pollution soil. However, because of the high food safety risk, At the same time of intercropping, some measures could be taken to reduce the CD content of fruit, such as applying cadmium bacteria or calcium magnesium phosphate fertilizer.
【作者单位】：杭州市植保土肥总站;污染环境修复与生态健康教育部重点实验室(浙江大学);杭州市农业科学研究院;
【基金】：杭州市科技项目(20140533B03,20140533B10) 国家重点研发项目(2016YFD0801100) 国家自然科学基金项目(41401266)
【分类号】：S642.4;S682.33;X53

【相似文献】