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[1]张迪,胡学玉,殷俊,等.城郊农业生态系统中茎菜类蔬菜对重金属镉的累积特征及品质表现[J].应用与环境生物学报,2015,21(02):188-194.[doi:10.3724/SP.J.1145.2014.09027]
 ZHANG Di,HU Xueyu,YIN Jun,et al.Cadmium accumulation and vegetable quality of edible parts of stem vegetables growing in suburban farmlands[J].Chinese Journal of Applied & Environmental Biology,2015,21(02):188-194.[doi:10.3724/SP.J.1145.2014.09027]
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城郊农业生态系统中茎菜类蔬菜对重金属镉的累积特征及品质表现()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
21卷
期数:
2015年02期
页码:
188-194
栏目:
研究论文
出版日期:
2015-04-25

文章信息/Info

Title:
Cadmium accumulation and vegetable quality of edible parts of stem vegetables growing in suburban farmlands
作者:
张迪 胡学玉 殷俊 张阳阳 陈威
1中国地质大学(武汉)环境学院 武汉 430074 2中国地质大学湿地演化与生态恢复湖北省重点实验室 武汉 430074
Author(s):
ZHANG Di HU Xueyu YIN Jun ZHANG Yangyang CHEN Wei1
1School of Environmental Studies, China University of Geosciences, Wuhan 430074, China 2Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, China University of Geosciences, Wuhan 430074, China
关键词:
茎菜类蔬菜镉积累特性土壤重金属镉基因型差异品质表现
Keywords:
stem vegetable cadmium accumulation soil heavy metal cadmium genotypic difference vegetable quality
分类号:
X53 : S63
DOI:
10.3724/SP.J.1145.2014.09027
文献标志码:
A
摘要:
为探索城郊区农业土壤重金属镉(Cd)的生态阻控技术,结合田间试验、盆栽试验和室内分析测定等手段,以蔬菜茎叶部分Cd含量、富集系数、转移系数、单株生物量、茎叶维生素C含量、还原糖含量等因子为考察指标,分析13个红菜薹品种、5个莴笋品种和4个芹菜品种的Cd积累特征和品质表现. 结果显示,两种Cd水平下(土壤总Cd分别为0.43 mg/kg和3.00 mg/kg),供试蔬菜茎叶部Cd含量不论是种间还是种内均差异显著(P < 0.05). 三大类供试蔬菜茎叶Cd含量与富集系数的大小均为芹菜>莴笋>菜薹,且在低Cd水平下,菜薹的生产性能及品质指标也为最优. 在13个菜薹品种中,低、高Cd水平下茎叶平均Cd含量分别为0.021 0 mg/kg和0.302 1 mg/kg. 13个菜薹品种的聚类分析结果显示,金秋红3号、钟声红和二早子属于弱吸收低积累Cd品种. 且金秋红3号在低Cd条件下还有较高的品质表现,其可食部位维生素C含量和还原糖含量分别达到77.2 mg/100 g和19.44%. 在本研究设置的高、低Cd条件下,供试蔬菜品种的Cd积累特性、品质特征以及生物量指标都具有较强的一致性,集合这些指标应用于筛选弱吸收低积累Cd的茎菜类蔬菜品种是可行的. 因此,挖掘作物自身潜力,基于植物不同种及品种吸收积累重金属Cd的基因型差异,利用弱吸收低积累重金属的作物品种,在轻度或中度重金属污染农田中进行作物生产,可以降低Cd等重金属元素经农产品进入人类食物链的风险.
Abstract:
In order to explore the effective ecological controlling technology against the heavy metal cadmium (Cd), the present research studied the Cd accumulation characteristics and quality of 22 stem vegetables varieties by comparing the differences of the content level, concentration coefficients and transfer coefficient of Cd in the stem-leaf part of vegetables, as well as three common indexes of plants biomass. The study design included methods of field experiment, pot experiment and chemical analysis. The 22 stem vegetables included 13 Brassica varieties, 5 Lactucapsativa varieties and 4 Apium graveolens varieties. The results showed that Cd content in the stem-leaf part was signifincantly different (P < 0.05) among different varieties under two levels of soil Cd content (low Cd content in soil: 0.43 mg/kg and high Cd content: 3.00 mg/kg). The Cd content and enrichment concentration coefficient of the stem-leaf part of the three types of tested vegetables were in the same order as Apium graveolens varieties > Lactucapsativa varieties > Brassica varieties. The Brassica varieties had the highest biomass and the best quality under low soil Cd level. The average Cd content of stem-leaf part of 13 Brassica varieties was 0.0210 mg/kg under low Cd condition content and 0.3021 mg/kg under high soil Cd condition content. Cluster analysis showed that 3 Brassica varieties of Jinqiuhong III, Zhongshenghong and Erzaozi had the lowest Cd content under both low and high Cd levels. Furthermore, Jinqiuhong III had high quality under low soil Cd level, with vitamin C content and reducing sugar content of its edible parts as 77.2 mg/100g and 19.44% respectively. The Cd accumulation characteristics, quality characteristics and biomass were of strong consistency in the tested vegetables under low and high soil Cd levels, indicating that they are good indicators for selecting stem vegetables varieties of weak Cd absorption. The results proved that by choosing species and varieties with low Cd absorption and accumulation, we can grow such plants in mildly or moderately heavy-metal-contaminated farmland soils, to reduce the risk of Cd and other heavy metal elements entering human food chain through agricultural products.

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备注/Memo

备注/Memo:
国家自然科学基金项目(41071159、41371485)、国家“十一五”重大科技支撑计划课题(2008BADA7B03)、湖北省自然科学基金重点项目(2014CFA116)和湖北省公益性科技研究项目(GYS0022)资助 Supported by the National Natural Science Foundation of China (41071159, 41371485), the Key Sci-tech Project of the Eleventh Five-year Plan of China (2008BADA7B03), the Key Project of Natural Science Foundation of Hubei Province (2014CFA116) and the Hubei Provincial Sci-tech Research Project of Public Welfare (GYS0022)
更新日期/Last Update: 2015-04-27