| 张丽,侯萌瑶,安毅,李玉浸,林大松,朱丹妹,秦莉,霍莉莉.生物炭对水稻根际微域土壤Cd生物有效性及水稻Cd含量的影响[J].农业环境科学学报,2017,36(4):665-671. |
| 生物炭对水稻根际微域土壤Cd生物有效性及水稻Cd含量的影响 |
| Effects of biochar on Cd bioavailability in rhizosphere microenvironment of cadmium-polluted paddy and Cd content in rice |
| 投稿时间：2016-10-26 |
| DOI：10.11654/jaes.2016-1363 |
| 中文关键词: 生物炭 水稻 根际环境 Cd 生物有效性 |
| 英文关键词: biochar rice rhizosphere microenvironment Cd bioavailability |
| 基金项目:国家自然科学基金项目（31200397） |
| 作者 | 单位 | E-mail | | 张丽 | 东北农业大学资源与环境学院, 哈尔滨 150000
农业部环境保护科研监测所, 天津 300191 | | | 侯萌瑶 | 东北农业大学资源与环境学院, 哈尔滨 150000
农业部环境保护科研监测所, 天津 300191 | | | 安毅 | 农业部环境保护科研监测所, 天津 300191 | | | 李玉浸 | 农业部环境保护科研监测所, 天津 300191 | | | 林大松 | 农业部环境保护科研监测所, 天津 300191 | lindasong608@126.com | | 朱丹妹 | 农业部环境保护科研监测所, 天津 300191 | | | 秦莉 | 农业部环境保护科研监测所, 天津 300191 | | | 霍莉莉 | 农业部环境保护科研监测所, 天津 300191 | |
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| 中文摘要: |
| 采用根际箱培养的方式，研究了在Cd污染土壤中施用生物炭对根际和非根际土壤pH值、Cd生物有效性及Cd在水稻植株不同部位累积量的影响。结果表明：土壤pH值随着输入生物炭比例增加有上升趋势。在不同用量生物炭添加下，根际和非根际土壤Cd有效态含量均有下降，其中，根际土壤在中用量（50 g·kg-1）生物炭处理下降幅最大，达13.9%；非根际第一、二层土壤在高用量（100 g·kg-1）生物炭处理下达显著差异（P<0.05），分别下降了27.4%和22.9%，而第三层土壤Cd有效态含量在中用量（50 g·kg-1）处理下效果最明显，下降了29.2%。施加生物炭均降低水稻各部位Cd含量，且与对照相比，水稻根和糙米中Cd的含量在中用量（50 g·kg-1）生物炭处理下达显著性差异（P<0.05），分别下降了49.8%和81.2%；茎叶和稻壳分别在高用量（100 g·kg-1）和中用量（50 g·kg-1）处理下降幅最大，分别下降了28.2%和47.1%。由此可见，在Cd污染土壤中添加一定量的生物炭能提高土壤的pH值，降低土壤中Cd的生物有效性并抑制水稻对Cd的吸收。 |
| 英文摘要: |
| Rhizobox training experiments were performed to investigate the role of biochar on the pH, Cd bioavailability in rhizosphere and non-rhizosphere soil and the accumulation of Cd in different parts of rice plants. Results showed that the soil pH value has a rising trend with the increasing proportion of biochar. The available forms of Cd were declined under different dosages of biochar in rhizosphere and non-rhizosphere soil, with the maximum reduction of 13.9% under the treatment of 50 g·kg-1 biochar in rhizosphere soil. Cd concentrations in the first and second layer in non-rhizosphere soil were significant decreased under the dosage of 100 g·kg-1 biochar, resulting in 27.4% and 22.9% reduction, respectively in contrast to the control, but for available Cd concentration in the third layer of non-rhizosphere soil, it was significantly declined under the middle dosage of 50 g·kg-1 biochar, and decreased by 29.2 compared with CK. The application of biochar reduced Cd accumulation in different parts of rice. There was a significant difference(P<0.05) in root and rice under the content of 50 g·kg-1 biochar compared with control treatments, and dropped by 49.8% and 81.2% respectively. The maximum reduction of 28.2% and 47.1% in Cd concentrations in the leaf and rice husk was got under the dosage of 100 g·kg-1 and 50 g·kg-1, respectively. It was observed that application of a certain amount of biochar can improve pH value of soil, and reduce the bioavailability of Cd in soil and Cd absorption in rice. |
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