| 刘娟,李佳佳,张乃明,冯光泉.复合钝化剂对镉污染土壤三七生长及生理特性的影响[J].农业环境科学学报,2020,39(10):2190-2197. |
| 复合钝化剂对镉污染土壤三七生长及生理特性的影响 |
| Effects of compound passivators on growth and physiological characteristics of Panax notoginseng in cadmium-contaminated soil |
| 投稿时间：2020-01-17 |
| DOI：10.11654/jaes.2020-0077 |
| 中文关键词: 钝化剂 三七 生理生化 镉污染 |
| 英文关键词: passivator Panax notoginseng physiology and biochemistry cadmium pollution |
| 基金项目:国家重点研发计划项目（2018YFD0800603） |
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| 摘要点击次数: 1206 |
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| 中文摘要: |
| 三七是云南最重要的中药材，为探究复合钝化剂对镉污染土壤上三七生长及其镉吸收累积的影响，以一年生三七为供试材料，采用盆栽试验方法，研究了钝化剂不同添加量（0、0.50%、1.00%、1.50%）对三七生长、生理生化指标以及镉吸收累积的影响。结果表明：施用钝化剂能够有效促进三七的生长，增加三七株高、叶长、叶宽、茎粗以及叶绿素含量，同时显著提高三七地上和地下生物量；复合钝化剂能够降低三七主根和叶片中MDA含量，而CAT活性却随着钝化剂添加量的增加而上升，同时，三七主根和叶片中游离氨基酸含量及主根可溶性蛋白含量降低。复合钝化剂不仅可以降低土壤中有效态镉的含量，还对三七各部位吸收镉产生一定的影响，与对照相比，三七主根镉含量降低了21.4%~57.1%、剪口降低了58.9%~62.6%、茎部降低了47.4%~67.4%、叶降低了25.0%~53.1%。研究表明，在镉污染土壤中使用复合钝化剂既可以有效地促进三七的生长发育，又可以减少镉在三七各个器官中的累积，在本试验条件下设置的3种钝化剂添加量中，添加量为1.50%的处理效果较好。 |
| 英文摘要: |
| Panax notoginseng is the most important Chinese herbal medicine in Yunnan Province. In order to explore the effects of compound passivators on plant growth and Cd absorption in Cd-contaminated soil cultivation, taking 1 year old Panax notoginseng as the experimental material and using a pot experiment, the effects of different dosages of passivators(0, 0.50%, 1.00%, and 1.50%)on the growth, physiological indexes, biochemical indexes, and Cd absorption and accumulation of Panax notoginseng were studied. The results showed that the growth of Panax notoginseng was promoted by using passivators; the plant height, leaf length, leaf width, stem diameter, and chlorophyll content increased; and the aboveground and underground biomass of Panax notoginseng increased significantly; the compound passivator could reduce the MDA content in the main root and leaves of Panax notoginseng, but the CAT content increased with the increase in the passivator content. Simultaneously, the contents of free amino acids and soluble proteins in the main root and leaves of Panax notoginseng decreased; and the compound passivator not only reduced the content of available Cd in the soil, but also affected the absorption of Cd in different parts of Panax notoginseng. Compared with that of the control, the content of Cd in the main root of Panax notoginseng decreased by approximately 21.4%~57.1%, that in the cutting decreased by 58.9%~62.6%, that in the stems decreased by 47.4%~67.4%, and that in the leaves of Panax notoginseng decreased by 25.0%~53.1%. Thus, the application of compound passivators in Cd-contaminated soil can not only effectively promote the growth and development of Panax notoginseng, but also reduce the accumulation of Cd in various organs of Panax notoginseng. The recommended dosage among the three passivator additives is 1.50%. |
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