| 吴乐诗,余柏仲,李冬琴,黎华寿,陈桂葵.菜心与东南景天间作修复镉污染农田的生态效应[J].农业环境科学学报,2024,43(7):1483-1491. |
| 菜心与东南景天间作修复镉污染农田的生态效应 |
| Ecological effects of intercropping Brassica parachinensis and Sedum alfredii on the remediation of cadmium-contaminated farmland |
| 投稿时间：2023-10-25 |
| DOI：10.11654/jaes.2023-0881 |
| 中文关键词: 菜心 东南景天 间作 镉 生态效应 |
| 英文关键词: Brassica parachinensis Sedum alfredii Hance intercropping cadmium ecological effects |
| 基金项目:国家重点研发计划项目（2020YFC1807805）；科技创新战略专项资金项目（高水平农科院建设） |
|
| 摘要点击次数: 1243 |
| 全文下载次数: 1333 |
| 中文摘要: |
| 为了探究镉低积累型菜心碧绿粗苔和镉超积累植物东南景天间作修复镉污染土壤的效果，在华南农业大学生态农场进行了模拟控制试验，分别采集菜心、东南景天在单作和间作时的根际土进行研究。结果表明：间作可显著提高植物的生物量，其中东南景天地上和地下部的生物量较单作分别提高了 79.05% 和 50.00%，菜心地上和地下部的生物量则分别提高了 110.96% 和125.00%；间作使东南景天地上和地下部的镉含量较单作分别提高了 7.61% 和 70.73%，但菜心地上部的镉含量较单作降低了27.21%；东南景天茎叶储存Cd的主要亚细胞结构为液泡中的细胞液，占比高达90%，远高于细胞器与细胞壁中的Cd含量；间作显著增加了土壤的 pH，相较于东南景天、菜心单作时的 pH分别增加了 0.39、0.28个单位；间作降低了菜心根际土镉的有效性，较单作低 19.23%；另外，间作可使土壤微生物总量和蔗糖酶活性显著增加，其中放线菌数量比菜心、东南景天单作时分别增加了27.95%、24.28%，蔗糖酶活性则分别提高了 164.89%、88.48%。同时，通过计算可知间作的东南景天土壤镉提取率是单作的 1.88倍。综上所述，镉低积累型菜心与镉超积累植物东南景天间作，不仅可提高菜心生产的安全性，而且增加了东南景天对土壤镉的提取效率，是一种经济、有效且风险较低的边生产边修复的模式。 |
| 英文摘要: |
| In order to investigate the effect of intercropping the cadmium（Cd）low-accumulator Brassica parachinensis（B. parachinensi） and the Cd hyperaccumulator plant Sedum alfredii Hance（S. alfredii） in remediating Cd-contaminated soils, a simulation control experiment was conducted at the ecological farm of South China Agricultural University. The rhizosphere soil of B. parachinensi and S. alfredii were collected for study under monoculture and intercropping conditions. The results showed that intercropping significantly increased the biomass of plants, with the shoot and root biomass of S. alfredii increasing by 79.05% and 50.00%, and that of B. parachinensi increased by 110.96% and 125.00%, respectively, compared to monoculture. Intercropping resulted in an increase of 7.61% and 70.73% for Cd content in the shoot and root of the S. alfredii, respectively, while the Cd content in the shoot of B. parachinensi decreased by 27.21% compared to that of monoculture. The main subcellular structure storing Cd in the stems and leaves of S. alfredii was the cytosol in vesicles, accounting for up to 90% of storage, which is much higher than the Cd content in organelles and cell walls. Intercropping significantly increased the pH of the soil, with an increase of 0.39 and 0.28 compared to monoculture with S. alfredii and B. parachinensi, respectively. Intercropping reduced the availability of Cd in the rhizosphere soil of B. parachinensi, which was 19.23% lower than that of monoculture. In addition, intercropping resulted in a significant increase in the total amount of soil microorganisms and invertase activity, with the number of actinomycetes increasing by 27.95% and 24.28% respectively compared to monoculture with B. parachinensi and S. alfredii, and the sucrase activity increasing by 164.89% and 88.48% respectively. Meanwhile, it can be concluded that the cadmium extraction rate from the soil of intercropped S. alfredii was 1.88 times higher than that of monoculture. In conclusion, intercropping of a low Cd-accumulating vegetable（B. parachinensi）with a high Cd-accumulating remediation plant（S. alfredii）not only improves the safety of B. parachinensi production, but also increases the efficiency of soil Cd extraction by S. alfredii, which is an economical, effective and less risky model of remediation during production. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
