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Synergistic Effects of Silicon and Ferrous Sulfate on Reducing Arsenic and Cadmium Accumulation in Rice from Co-Contaminated Soil SCIE
期刊论文 | 2025 , 15 (6) | AGRONOMY-BASEL
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Abstract :

The co-contamination of arsenic (As) and cadmium (Cd) in paddy soils threatens rice safety, yet synergistic mitigation strategies using silicon (Si) and ferrous sulfate (FeSO4) remain underexplored. This study integrated hydroponic and soil pot experiments to evaluate Si-FeSO4 interactions on As/Cd accumulation and rice growth. Hydroponic trials employed 21-day-old rice seedlings exposed to 0.5 mg As(III)/Cd(II) L-1 with/without 70 mg Si L-1 and 30-70 mg Fe L-1, followed by sequential harvesting at 14 and 21 days. Soil experiments utilized co-contaminated paddy soil (50 mg As kg(-1) and 1.2 mg Cd kg(-1)) amended with Si (80 or 400 mg kg(-1)) and Fe (100 or 1000 mg kg(-1)), with pore water dynamics monitored over 120 days. Hydroponic results demonstrated that 70 mg Si L-1 combined with 30 or 70 mg Fe L-1 enhanced shoot biomass by 12-79% under As stress, while simultaneously reducing shoot As concentrations by 76-87% and Cd concentrations by 14-33%. Iron plaque induced by FeSO4 exhibited contrasting adsorption behaviors: hydroponic roots immobilized both As and Cd (p < 0.01), whereas roots in soil primarily retained Cd (p < 0.05). In soil experiments, the optimal treatment of 100 mg Fe kg(-1) and 400 mg Si kg(-1) (Fe-1 + Si-2) increased grain biomass by 54%, while reducing As and Cd concentrations by 37% and 42%, respectively. However, a higher Fe dosage (Fe-2: 1000 mg kg(-1) Fe) paradoxically increased grain Cd concentrations. Mechanistically, Si amendment elevated soil pH (Delta + 0.72), facilitating Cd immobilization, while FeSO4 lowered pH (Delta-0.07-0.53), increasing Cd mobility. A strong correlation between soluble Cd and plant uptake was observed (p < 0.01), while changes in As accumulation were unrelated to aqueous behavior. The optimized Si/Fe molar ratio of 7.95:1 effectively mitigated As and Cd co-accumulation, offering a dual-functional strategy for safe rice cultivation in contaminated soils.

Keyword :

As-Cd co-contamination As-Cd co-contamination iron plaque iron plaque pore water pore water potentially toxic elements potentially toxic elements soil remediation soil remediation

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GB/T 7714 You, Yanlin , Guo, Xiaodong , Chen, Jianyu et al. Synergistic Effects of Silicon and Ferrous Sulfate on Reducing Arsenic and Cadmium Accumulation in Rice from Co-Contaminated Soil [J]. | AGRONOMY-BASEL , 2025 , 15 (6) .
MLA You, Yanlin et al. "Synergistic Effects of Silicon and Ferrous Sulfate on Reducing Arsenic and Cadmium Accumulation in Rice from Co-Contaminated Soil" . | AGRONOMY-BASEL 15 . 6 (2025) .
APA You, Yanlin , Guo, Xiaodong , Chen, Jianyu , Liu, Zhiqin , Cai, Qiuying , Yu, Jinyong et al. Synergistic Effects of Silicon and Ferrous Sulfate on Reducing Arsenic and Cadmium Accumulation in Rice from Co-Contaminated Soil . | AGRONOMY-BASEL , 2025 , 15 (6) .
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Arsenic (As) accumulation in different genotypes of indica rice (Oryza sativa L.) and health risk assessment based on inorganic As SCIE
期刊论文 | 2024 , 196 (3) | ENVIRONMENTAL MONITORING AND ASSESSMENT
WoS CC Cited Count: 1
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To reveal differences in arsenic (As) accumulation among indica rice cultivars and assess the human health risks arising from inorganic arsenic (iAs) intake via rice consumption, a total of 320 field indica rice samples and corresponding soil samples were collected from Fujian Province in China. The results showed that available soil As (0.03 to 3.83 mg/kg) showed a statistically significant positive correlation with total soil As (0.10 to 19.45 mg/kg). The inorganic As content in brown rice was between 0.001 and 0.316 mg/kg. Among the cultivars, ten brown rice samples (3.13%) exceeded the maximum contaminant level (MCL) of iAs in food of 0.2 mg/kg in China. The estimated daily intake (EDI) and calculated individual incremental lifetime cancer risk (ILCR) ranged from 0.337 mu g/day to 106.60 mu g/day and from 8.18 x 10(-6 )to 2.59 x 10(-3), respectively. Surprisingly, the average EDI and the EDIs of 258 (80.63%) brown rice samples were higher than the maximum daily intake (MDI) of 10 mu g/day in drinking water as set by the National Research Council. The mean ILCR associated with iAs was 54.3 per 100,000, which exceeds the acceptable upper limit (AUL) of 10 per 100,000 set by the USEPA. Notably, the cultivars Y-Liang-You 1 and Shi-Ji 137 exhibited significantly higher mean ILCRs compared to the AUL and other cultivars, indicating that they pose more serious cancer risks to the local population. Finally, this study demonstrated that the cultivars Yi-Xiang 2292 and Quan-Zhen 10 were the optimal cultivars to mitigate risks associated with iAs to human health from rice consumption.

Keyword :

Accumulation Accumulation Arsenic (As) Arsenic (As) Health risk assessment Health risk assessment Indica rice Indica rice Inorganic as (iAs) Inorganic as (iAs)

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GB/T 7714 Chen, Chunle , Yu, Yanhang , Tian, Tian et al. Arsenic (As) accumulation in different genotypes of indica rice (Oryza sativa L.) and health risk assessment based on inorganic As [J]. | ENVIRONMENTAL MONITORING AND ASSESSMENT , 2024 , 196 (3) .
MLA Chen, Chunle et al. "Arsenic (As) accumulation in different genotypes of indica rice (Oryza sativa L.) and health risk assessment based on inorganic As" . | ENVIRONMENTAL MONITORING AND ASSESSMENT 196 . 3 (2024) .
APA Chen, Chunle , Yu, Yanhang , Tian, Tian , Xu, Bo , Wu, Hongyan , Wang, Guo et al. Arsenic (As) accumulation in different genotypes of indica rice (Oryza sativa L.) and health risk assessment based on inorganic As . | ENVIRONMENTAL MONITORING AND ASSESSMENT , 2024 , 196 (3) .
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Coupling effects of Fe(II) and CaCO3 application on cadmium uptake and accumulation in rice (Oryza saliva L.) SCIE
期刊论文 | 2024 , 97 | JOURNAL OF APPLIED BOTANY AND FOOD QUALITY
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Excessive cadmium (Cd) in rice, caused by Cd pollution of farmlands, poses a serious threat to human health. In this study, a pot experiment was conducted to investigate the effects of two doses of CaCO3 (Ca1: 2 g kg -1, Ca2: 10g kg -1), two types of Fe(II) (EDTA-Fe(II) and FeSO4; 0.14 g Fe kg -1), and their combined application on the uptake and accumulation of Cd in rice plants grown in Cd-contaminated acidic soil. The results revealed that FeSO4 significantly increased rice grain biomass, whereas the other treatments had no significant effects. Further, the addition of EDTA-Fe(II) or FeSO4 significantly enhanced iron plaque formation on the root surface and increased the Fe content in the rice plants and porewater. Compared to the control, CaCO3 addition weakened the formation of iron plaque and reduced the Fe concentration in the porewater and root tissue, stems and leaves, whereas the Fe concentration in brown rice and the husks remained unaffected. Combined application of CaCO3 and Fe(II) significantly promoted the formation of iron plaque and increased the Fe concentration in brown rice. However, the Cd concentration in the iron plaque was reduced by CaCO3 addition but increased by Fe(II) treatment. Notably, all treatments reduced the Cd concentration in all rice plant tissues. The application of Ca1, Ca2, EDTA-Fe(II), FeSO4, Ca1+EDTA-Fe(II), Ca1+FeSO4, Ca2+EDTA-Fe(II) and Ca2+FeSO4 significantly reduced the Cd concentration in brown rice by 69%, 63%, 51%, 60%, 46%, 39%, 38%, and 29%, respectively. These results indicate that the application of CaCO3, EDTA-Fe(II)/FeSO4, or their combination can effectively reduce Cd accumulation and translocation in rice plants.

Keyword :

Cadmium translocation Cadmium translocation Calcium carbonate Calcium carbonate Ferrous ion Ferrous ion Iron plaque Iron plaque Oryza sativa L. Oryza sativa L.

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GB/T 7714 Xu, Bo , Chen, Jianyu , Qian, Bingjie et al. Coupling effects of Fe(II) and CaCO3 application on cadmium uptake and accumulation in rice (Oryza saliva L.) [J]. | JOURNAL OF APPLIED BOTANY AND FOOD QUALITY , 2024 , 97 .
MLA Xu, Bo et al. "Coupling effects of Fe(II) and CaCO3 application on cadmium uptake and accumulation in rice (Oryza saliva L.)" . | JOURNAL OF APPLIED BOTANY AND FOOD QUALITY 97 (2024) .
APA Xu, Bo , Chen, Jianyu , Qian, Bingjie , Jiao, Duoduo , You, Yanlin , Guo, Xiaodong et al. Coupling effects of Fe(II) and CaCO3 application on cadmium uptake and accumulation in rice (Oryza saliva L.) . | JOURNAL OF APPLIED BOTANY AND FOOD QUALITY , 2024 , 97 .
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Influence of FeSO4, nano zero-valent iron, and their CaCO3 composites on the formation of iron plaque and cadmium translocation in rice (Oryza sativa L.) SCIE
期刊论文 | 2024 , 36 (1) | ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY
WoS CC Cited Count: 3
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Despite extensive research on Fe-based materials for soil cadmium(Cd) passivation, the combined effects with Ca agents on rice Cd migration remain unclear. This study examined the effects of NZVI, FeSO4 and their mixtures with CaCO3 on iron plaque formation and Cd translocation in rice plants grown in Cd-contaminated paddy soils. Results showed both NZVI and FeSO4 significantly increased rice biomass. FeSO4, NZVI, FeSO4+CaCO3, and NZVI+CaCO3 enhanced iron plaque by 65%, 72%, 77%, and 20%, respectively. Cd adsorption by iron plaque increased by 88% with FeSO4, 39% with NZVI, 49% with FeSO4+CaCO3, and decreased by 44% with NZVI+CaCO3. All treatments reduced Cd content in rice tissues, with brown rice Cd concentrations reduced by 66% with FeSO4, 58% with FeSO4+CaCO3, 45% with NZVI, and 39% with NZVI+CaCO3, respectively. This study highlights Fe-based amendments' potential in safely utilizing Cd-contaminated farmlands, showing standalone Fe treatments outperform Fe-Ca combination for reducing Cd in brown rice.

Keyword :

CaCO3 CaCO3 cadmium cadmium Iron plaque Iron plaque rice rice translocation translocation

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GB/T 7714 Xu, Bo , Chen, Jianyu , Hu, Yuanbiao et al. Influence of FeSO4, nano zero-valent iron, and their CaCO3 composites on the formation of iron plaque and cadmium translocation in rice (Oryza sativa L.) [J]. | ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY , 2024 , 36 (1) .
MLA Xu, Bo et al. "Influence of FeSO4, nano zero-valent iron, and their CaCO3 composites on the formation of iron plaque and cadmium translocation in rice (Oryza sativa L.)" . | ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY 36 . 1 (2024) .
APA Xu, Bo , Chen, Jianyu , Hu, Yuanbiao , You, Yanlin , Sun, Xiaochun , Yu, Jinyong et al. Influence of FeSO4, nano zero-valent iron, and their CaCO3 composites on the formation of iron plaque and cadmium translocation in rice (Oryza sativa L.) . | ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY , 2024 , 36 (1) .
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Effects of Caco3 and Fe(Ii) Application on Cadmium Uptake by Rice (Oryza Sativa L.) EI
期刊论文 | 2023 | SSRN
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Excessive cadmium (Cd) in rice, caused by Cd pollution in farmland, poses a serious threat to human health. A pot experiment was conducted to investigate the effects of two doses of CaCO3 (Ca1: 2 g kg-1, Ca2: 10g kg-1), two types of Fe(II) (EDTA-Fe(II) and FeSO4 (0.14 g Fe kg-1)), and their combination application on the uptake and accumulation of Cd in rice plant in pot trials with Cd-contaminated acidic soil. Results revealed that FeSO4 significantly increased rice grain biomass, whereas other treatments had no significant effect. The application of CaCO3 weakened the formation of Fe plaque and reduced Fe concentration in porewater and root tissue, stem and leaf, but Fe concentration in brown rice and husk remained unaffected. Fe(II) and CaCO3+Fe(II) significantly promoted the formation of Fe plaque and increased Fe concentration in brown rice. Cd concentration in Fe plaque was reduced by CaCO3, while it was increased by Fe(II), respectively. All treatments significantly reduced Cd concentration in all tissues of rice plant. The application of Ca1, Ca2, EDTA-Fe(II), FeSO4, Ca1+EDTA-Fe(II), Ca1+FeSO4, Ca2+EDTA-Fe(II) and Ca2+FeSO4 resulted in a significant reduction of Cd concentration in brown rice by 69%, 63%, 51%, 60%, 46%, 39%, 38%, and 29%, respectively. Soil pH decreased after rice harvest, but all treatments significantly increased soil pH by 0.71-1.65 units. During the growth period of the rice plant, Cd and Fe concentrations in porewater generally showed a gradual decrease trend. At 90 and 120 days, all treatments reduced Cd concentration in porewater, but Fe(II) or CaCO3+Fe(II) increased Fe concentration in porewater. These results indicate that the application of CaCO3, EDTA-Fe(II)/FeSO4, and their combination is effective in immobilizing Cd and reducing Cd uptake by rice plants, although long-term trials are required to validate these findings. © 2023, The Authors. All rights reserved.

Keyword :

Cadmium Cadmium Calcite Calcite Calcium carbonate Calcium carbonate Health risks Health risks Iron compounds Iron compounds Soil pollution Soil pollution Soils Soils Sulfur compounds Sulfur compounds Tissue Tissue

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GB/T 7714 Xu, Bo , Chen, Jianyu , Qian, Bingjie et al. Effects of Caco3 and Fe(Ii) Application on Cadmium Uptake by Rice (Oryza Sativa L.) [J]. | SSRN , 2023 .
MLA Xu, Bo et al. "Effects of Caco3 and Fe(Ii) Application on Cadmium Uptake by Rice (Oryza Sativa L.)" . | SSRN (2023) .
APA Xu, Bo , Chen, Jianyu , Qian, Bingjie , Jiao, Duoduo , You, Yanlin , Guo, Xiaodong et al. Effects of Caco3 and Fe(Ii) Application on Cadmium Uptake by Rice (Oryza Sativa L.) . | SSRN , 2023 .
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Mechanisms for potential Pb immobilization by hydroxyapatite in a soil-rice system SCIE
期刊论文 | 2021 , 783 | SCIENCE OF THE TOTAL ENVIRONMENT
WoS CC Cited Count: 17
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This study aimed to investigate the mechanism of lead (Pb) immobilization by hydroxyapatite (HAP) in a soil-rice system, a pot experiment was conducted using Pb-contaminated soil amended with various rates of HAP and planted with rice (Oryza saliva L.). The Pb species in the soil and rice roots were determined using Pb L3-edge X-ray absorption near edge structure (XANES). Application of HAP increased soil pH and induced the dissolution of phosphate, subsequently promoting the formation of chloropyromorphite, an insoluble Pb species, in the soil. Therefore, the add soluble and DMA-extractable Pb concentrations decreased significantly with increasing levels of applied HAP. HAP reduced the retention of Pb in the iron plaque on the root surface at maturity, thereby alleviating Pb uptake by rice roots. The amount of phosphate in roots were increased with increasing rate of application of HAP, but was negatively correlated with Pb in rice stems and leaves. Application of 32 g kg(-1) of HAP triggered the precipitation of Pb5PO4Cl in roots, limiting Pb translocation from roots to shoots. In addition, HAP may induce the redistribution of Pb in rice nodes, lowering the transfer factor of Pb from the stem (or leaf) to rice grains. When the rate of application of HAP exceeds 4 g kg(-1), the Pb concentration in brown rice could be reduced to less than the Chinese National Standard of 0.2 mg kg(-1) (GB2762-2017). (C) 2021 Elsevier B.V. All rights reserved.

Keyword :

Hydroxyapatite (HAP) Hydroxyapatite (HAP) Pb Pb Rice Rice Translocation Translocation

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GB/T 7714 Li, Honghong , Liu, Yuting , Tang, Shouyin et al. Mechanisms for potential Pb immobilization by hydroxyapatite in a soil-rice system [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2021 , 783 .
MLA Li, Honghong et al. "Mechanisms for potential Pb immobilization by hydroxyapatite in a soil-rice system" . | SCIENCE OF THE TOTAL ENVIRONMENT 783 (2021) .
APA Li, Honghong , Liu, Yuting , Tang, Shouyin , Yu, Zuchen , Cai, Xuezhi , Xu, Shupeng et al. Mechanisms for potential Pb immobilization by hydroxyapatite in a soil-rice system . | SCIENCE OF THE TOTAL ENVIRONMENT , 2021 , 783 .
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拔尖创新人才培养的现实透视与多学科审思——基于36所“强基计划”试点高校的分析
期刊论文 | 2021 , (03) , 46-52 | 创新人才教育
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自提出"钱学森之问"起,教育界就施策予以回应,2009年的"拔尖计划1.0"就是其中一项重要举措。2020年,教育部在36所高校试点实施"强基计划",使"拔尖计划"再上新台阶。"拔尖计划"为社会培养了大批栋梁之才,推动了国家创新进步。对于拔尖创新人才,我们不仅要观得全景,更应理性审思。为了全面透视"强基计划",本文运用多学科研究方法,关注"人才培养入口——过程培养与管理——人才培养出口"整个过程,从社会学、哲学、管理学、经济学视角思考拔尖创新人才培养,提出分类培养"科学家"与"行业家",寻求教育公平与效率间的平衡,推进通识教育与专业教育有效融合,优化人才管理等建议,以期对拔尖创新人才培养的未来发展有所裨益。

Keyword :

多学科视角 多学科视角 拔尖创新人才 拔尖创新人才 钱学森之问 钱学森之问

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GB/T 7714 黄敏 , 陈炎辉 . 拔尖创新人才培养的现实透视与多学科审思——基于36所“强基计划”试点高校的分析 [J]. | 创新人才教育 , 2021 , (03) : 46-52 .
MLA 黄敏 et al. "拔尖创新人才培养的现实透视与多学科审思——基于36所“强基计划”试点高校的分析" . | 创新人才教育 03 (2021) : 46-52 .
APA 黄敏 , 陈炎辉 . 拔尖创新人才培养的现实透视与多学科审思——基于36所“强基计划”试点高校的分析 . | 创新人才教育 , 2021 , (03) , 46-52 .
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Organic fertilizer amendment increases methylmercury accumulation in rice plants SCIE
期刊论文 | 2020 , 249 | CHEMOSPHERE
WoS CC Cited Count: 14
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Rice grains are a methylmercury (MeHg) intake route for humans, especially in certain mercury (Hg)-contaminated areas. For rice plant growth, animal manure is commonly used as an organic fertilizer; however, its role in the formation of MeHg in paddy soils remains poorly understood. The aims of this study were thus to explore 1) the effect of chicken manure (CH) and cow manure (CO) addition on the production of soil MeHg and the accumulation of MeHg in rice plants and 2) the mechanism by which CH and CO addition affect the bioaccumulation of MeHg in grains. A pot experiment with different levels of CH and CO was carried out with newly deposited Hg-contaminated paddy soil. Two microcosm experiments were performed to explore the associated mechanisms. The results of the pot experiment showed that 0.1-1% CH and CO addition promoted the biomass of rice plants by 10-23% and increased the soil MeHg concentration by 34-143%, which exhibited a significant positive correlation with brown rice MeHg content. Organic fertilizer addition significantly increased MeHg bioaccumulation in rice plants and the ratio of MeHg to total Hg (THg) in brown rice. Organic fertilizer also increased the abundance of microbial methylators. The results of the microcosm experiments showed that organic fertilizer addition enhanced dissolved THg concentrations in soil and consequently increased the soil MeHg concentration. These results suggested that applying organic fertilizer to newly deposited Hg-contaminated soil may increase MeHg accumulation in grains due to enhanced Hg release and microbial methylator activity, leading to environmental health concerns. (C) 2020 Elsevier Ltd. All rights reserved.

Keyword :

Methylation Methylation Methylmercury Methylmercury Organic fertilizer Organic fertilizer Paddy soil Paddy soil Rice Rice

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GB/T 7714 Li, Yunyun , He, Xucheng , Wang, Yongjie et al. Organic fertilizer amendment increases methylmercury accumulation in rice plants [J]. | CHEMOSPHERE , 2020 , 249 .
MLA Li, Yunyun et al. "Organic fertilizer amendment increases methylmercury accumulation in rice plants" . | CHEMOSPHERE 249 (2020) .
APA Li, Yunyun , He, Xucheng , Wang, Yongjie , Guan, Jiaxun , Guo, Jingxia , Xu, Bo et al. Organic fertilizer amendment increases methylmercury accumulation in rice plants . | CHEMOSPHERE , 2020 , 249 .
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氯化铵和茶皂素单独与复合施用土壤中镉赋存形态的差异 CSCD
期刊论文 | 2020 , 41 (02) , 409-416 | 热带作物学报
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为探讨氯化铵(NH_4Cl)和茶皂素(teasaponin,TS)对镉(Cd)赋存形态的影响,以矿区Cd污染农田土壤为试验材料,采用室内土壤培养方法,模拟不同剂量的无机氮肥NH_4Cl和TS单施及复合施加对Cd污染农田土壤理化性质及Cd有效性的影响。结果表明:单独施加NH_4Cl和TS促进了土壤中残渣态Cd向弱酸提取态及可还原态Cd的转化,提高了土壤中Cd的生物有效性,且高剂量(60 mg/kg)NH_4Cl施加要优于低剂量(20 mg/kg)NH_4Cl;NH_4Cl(40 mg/kg)和TS(4 mg/kg)复合施加同样促进了土壤中残渣态Cd向弱酸提取态Cd的转化,增加Cd的有效性,且增加效果等同于高剂量的NH_4Cl和TS单独施加。逐步回归分析表明,pH和Cl~-是影响土壤中Cd有效性的2个关键因子。因此,在实际植物修复工作中可通过适当的农艺措施提高土壤Cl~-降低土壤pH以增加植物对Cd的累积量。此外,低剂量的NH_4Cl配施TS可显著增加土壤中Cd的生物有效性,避免高施用量NH_4Cl引起的土壤环境恶化。

Keyword :

土壤 土壤 氯化铵 氯化铵 茶皂素 茶皂素 镉形态 镉形态

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GB/T 7714 王茹 , 刘翔麟 , 周志强 et al. 氯化铵和茶皂素单独与复合施用土壤中镉赋存形态的差异 [J]. | 热带作物学报 , 2020 , 41 (02) : 409-416 .
MLA 王茹 et al. "氯化铵和茶皂素单独与复合施用土壤中镉赋存形态的差异" . | 热带作物学报 41 . 02 (2020) : 409-416 .
APA 王茹 , 刘翔麟 , 周志强 , 李云云 , 陈炎辉 , 陈锦 et al. 氯化铵和茶皂素单独与复合施用土壤中镉赋存形态的差异 . | 热带作物学报 , 2020 , 41 (02) , 409-416 .
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能源作物皇草对于Cd污染土壤提取修复潜力的研究
会议论文 | 2019 , 214 | 2019年中国土壤学会土壤环境专业委员会、土壤化学专业委员会联合学术研讨会
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本试验在野外田间条件下固化水泥池内进行,包含三种不同类型土壤(壤土、砂壤土、粘壤土),Cd为外源添加并稳定老化五年,共设置了0、0.25、0.5、1、2、4、8、16mg/kg8个Cd浓度梯度,并分为两个不同时期(拔节期、成熟期)进行收获。本研究的目的是为了探究不同土壤类型和不同收获方式对能源作物皇草提取修复Cd污染土壤的影响,发掘皇草的最大修复潜力,以期为实际的土壤修复提供指导。试验结果表明,在所设浓度范围内皇草对于Cd具有较好的耐受性,所有处理的TF<1,BCF>1,Cd主要保留在根部,且种植前后DTPA-Cd含量无显著变化,表明皇草具有较好的植物固定作用。土壤DTPA-Cd含量与皇草各部位提取量具有显著性相关(P<0.05),不同时期三种土壤中生长的皇草的提取修复效率具有差异性,当处于拔节期时,三类土壤的修复速率分别为:D>E>F,而成熟期分别为:E>F>D,这主要是由土壤CTPA-Cd含量与皇草的生物量共同决定的。拔节期是皇草地上部累积Cd的主要时期,而成熟期皇草的生物量显著高于拔节期,根据不同的目的可以选择不同的收获方式,选择拔节期一年收获4次,可以缩短修复年限;而选择成熟期一年收获3次,则可获得更高的生物量。

Keyword :

Cd Cd DTPA-Cd DTPA-Cd 土壤类型 土壤类型 植物提取 植物提取 皇草 皇草

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GB/T 7714 周志强 , 胡丽 , 刘翔麟 et al. 能源作物皇草对于Cd污染土壤提取修复潜力的研究 [C] //2019年中国土壤学会土壤环境专业委员会、土壤化学专业委员会联合学术研讨会论文摘要集 . 2019 : 214 .
MLA 周志强 et al. "能源作物皇草对于Cd污染土壤提取修复潜力的研究" 2019年中国土壤学会土壤环境专业委员会、土壤化学专业委员会联合学术研讨会论文摘要集 . (2019) : 214 .
APA 周志强 , 胡丽 , 刘翔麟 , 王茹 , 陈炎辉 , 王果 . 能源作物皇草对于Cd污染土壤提取修复潜力的研究 2019年中国土壤学会土壤环境专业委员会、土壤化学专业委员会联合学术研讨会论文摘要集 . (2019) : 214 .
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