纳米沸石对大白菜生长、抗氧化酶活性及镉形态、含量的影响

发布时间：2017-12-27 16:57

本文关键词：纳米沸石对大白菜生长、抗氧化酶活性及镉形态、含量的影响　出处：《环境科学》2017年03期 　论文类型：期刊论文

【摘要】：通过土培试验研究了纳米沸石(NZ)和普通沸石(OZ)对2个品种白菜生长、抗氧化酶活性,镉形态和含量的影响.结果表明,施用沸石明显提高了大白菜地上部和根部过氧化物酶(POD)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)活性,使大白菜地上部、植株总干重分别增加了4.5%~96.5%、3.4%~88.4%.施用纳米沸石和普通沸石有效降低了2个品种大白菜地上部和根部镉含量,且降低幅度随沸石施用量的增加而增加.低镉(1 mg·kg~(-1)Cd)条件下,山东四号和新晋菜三号大白菜可食部位(地上部)镉含量较对照(Cd_1+Z_0)分别降低了1.0%~75.0%、19.5%~68.9%(除Cd_1+OZ_5/OZ_(10)处理).高镉水平(5 mg·kg~(-1)Cd)条件下,山东四号和新晋菜三号大白菜可食部位(地上部)镉含量较对照(Cd_5+Z_0)分别降低了7.2%~53.2%(除Cd_5+OZ_(10)处理)、0.7%~63.0%.与普通沸石相比较,纳米沸石处理大白菜可食部位(地上部)镉含量降低10.5%~65.7%.在镉污染土壤上(1 mg·kg~(-1)和5 mg·kg~(-1)Cd),施用纳米沸石和普通沸石使山东四号品种大白菜可食部位(地上部)镉提取总量分别降低了12.4%~68.8%和13.2%~55.6%(除Cd_5+OZ_5处理),使新晋菜三号大白菜可食部位(地上部)镉提取总量分别降低了9.4%~71.5%和3.1%~38.7%(除Cd_1+OZ_5处理),且随着施用量的增加,降低幅度更大.
[Abstract]:Through pot experiment of nano zeolite (NZ) and common zeolite (OZ) growth and antioxidant enzyme activity of 2 varieties of Chinese cabbage, effects of cadmium content and morphology. The results show that the application of zeolite significantly increased the Chinese cabbage shoots and roots of peroxidase (POD), catalase (CAT), superoxide dismutase enzyme (SOD) activity of Chinese cabbage shoots and total plant dry weight were increased by 4.5%~96.5%, 3.4%~88.4%. and general application of nano zeolite zeolite can effectively reduce the 2 cultivars of Chinese cabbage shoots and roots of cadmium content, and the decrease was increased with increasing amount of zeolite application. Low cadmium (1 mg - kg~ (-1) Cd) under the condition of Shandong No. four and Jincai three Chinese cabbage edible parts (shoots) of cadmium content compared with the control (Cd_1+Z_0) were decreased by 1.0%~75.0% and 19.5%~68.9% (except Cd_1+OZ_5/OZ_ (10) treatment). The high level of cadmium (5 mg - kg~ (-1) Cd) under the condition of Shandong four And the new Chinese cabbage Jincai three edible parts (shoots) of cadmium content compared with the control (Cd_5+Z_0) were decreased by 7.2%~53.2% (except Cd_5+OZ_ (10), 0.7%~63.0%. treatment) compared with ordinary zeolite, nano zeolite treatment of Chinese cabbage edible parts (shoots) reduce the cadmium content in cadmium polluted soil (10.5%~65.7%. 1 mg - kg~ (-1) and 5 mg kg~ (-1) Cd), application of nano zeolite and zeolite to ordinary Shandong No. four varieties of Chinese cabbage edible parts (shoots) extraction of total cadmium were reduced by 12.4%~68.8% and 13.2%~55.6% (except Cd_5+OZ_5), the new Jincai three Chinese Cabbage (edible part of the extraction of total cadmium) were decreased by 9.4%~71.5% and 3.1%~38.7% (except Cd_1+OZ_5), and with the increase of fertilizer, decrease more.
【作者单位】：西南大学资源环境学院;武汉大学资源环境学院;
【基金】：现代农业产业技术体系建设专项(Nycytx-25) 国家自然科学基金项目(20477032) 国家科技支撑计划项目(2007BAD87B10)
【分类号】：X53;X503.231
【正文快照】： 镉(cadmium,Cd)是一种积累性的剧毒重金属元素,具有很强的致畸、致癌、致突变性作用,可通过食物链方式进入生物体而危害人和动物的健康.对中国26个城市土壤样品的重金属含量分析发现,各金属平均含量均超过了土壤环境背景值,其中以镉污染最为严重,是背景值的91.4倍[1].由于中国

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