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中国农学通报

中国农学通报 ›› 2019, Vol. 35 ›› Issue (28): 57-62.doi: 10.11924/j.issn.1000-6850.casb18070114

所属专题： 园艺

• 林学 园艺 园林 • 上一篇    下一篇

纳米氢氧化镁对大白菜产量、Cd含量及土壤Cd形态的影响

刘豫, 姚云柯, 陈胜伦, 杨聪, 金卓君, 张春来, 徐卫红.   

  1. 西南大学资源环境学院
  • 收稿日期:2018-07-24 修回日期:2019-02-13 接受日期:2019-02-25 出版日期:2019-10-14 发布日期:2019-10-14
  • 通讯作者: 徐卫红.
  • 基金资助:
    现代农业产业技术体系建设专项“现代农业大宗蔬菜产业技术体系专项”(CARS-23)；国家科技支撑计划项目“沿湖地区农业面源污染防 控与综合治理技术研究”(2007BAD87B10)。

Effect of Nano Magnesium Hydroxide on Yield and Cd Content of Brassica peckinensis and Cd Forms of Soil

  • Received:2018-07-24 Revised:2019-02-13 Accepted:2019-02-25 Online:2019-10-14 Published:2019-10-14

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摘要： 我国土壤Cd污染日趋严重。本研究探讨了纳米氢氧化镁对大白菜生长、Cd含量及形态、土壤Cd含量及形态的影响,以期为氢氧化镁在土壤Cd污染修复中的应用和蔬菜安全生产提供理论基础。采用大田试验研究了不同施加量(0、150、300、450 g.亩-1)的普通氢氧化镁和纳米氢氧化镁对大白菜的生长、Cd含量及形态、土壤的pH、土壤Cd含量及形态的影响。结果表明,与对照相比,施加氢氧化镁后大白菜产量增加了4.1%~22.3%。施用氢氧化镁后大白菜叶片、叶柄和根Cd含量分别降低了5.3%~19.2%、9.0%~28.1%和3.5%~19.3%,土壤Cd含量降低了8.2%~41.5%。相同施用量下,纳米氢氧化镁处理的大白菜叶片、叶柄和根Cd含量明显低于普通氢氧化镁。施用氢氧化镁使大白菜地上部蛋白质结合态(NaCl-F)Cd含量下降,残渣态(R-F)Cd含量增加,土壤pH值降低,土壤中铁锰氧化物结合态(FeMn-Cd)、有机结合态(OM-Cd)和残渣态(RES-Cd)Cd含量降低。总体而言,NMg1处理大白菜产量最高,叶片Cd含量最低,为本研究最佳处理。

关键词: 生防细菌, 生防细菌, 水稻纹枯病, 防效, 菌剂吸附载体

Abstract: To provide a basis for the application of nano magnesium hydroxide in the remediation of Cd pollution in soil and the safe production of vegetables, a field experiment was carried to study the effect of different levels (0, 2.25, 4.50, 6.75 kg/hm2) of common magnesium hydroxide and nano magnesium hydroxide on yield, content and Cd forms in Brassica peckinensis, and the pH value and the content of Cd chemical forms in soil. The results showed that the yield of B. peckinensis increased by 4.1%-22.3%. After the application of magnesium hydroxide, Cd contents in leaves, petioles and roots of B. peckinensis decreased by 5.3%-19.2%, 9.0%-28.1% and 3.5%-19.3%, respectively, and the Cd content in soil decreased by 8.2%-41.5%. The Cd content in leaves, petioles and roots of B. peckinensis treated with nano magnesium hydroxide was obviously lower than that with common magnesium hydroxide at the same application rate. After the application of magnesium hydroxide, the content of protein bound Cd (NaCl-F) in shoot of B. peckinensis decreased, while the content of residual Cd (R-F) in shoot increased, and the soil pH value, the content of FeMn-Cd, OM-Cd and RES-Cd in soil decreased. In general, the highest yield and the lowest leaf Cd content of Chinese cabbage was found in low-level nano-magnesium hydroxide 2.25 kg/hm2 (NMg1) treatment, which had the best effect of remediation of soil Cd pollution in our study.