文章摘要
樊玉,庄重,赵丽洁,张晨,王琪,李花粉,万亚男.不同玉米品种苗期对镉及营养元素的吸收转运特性[J].农业环境科学学报,2023,42(4):744-753.
不同玉米品种苗期对镉及营养元素的吸收转运特性
Uptake and transport characteristics of cadmium and nutrients in different varieties of maize(Zea mays)at seedling stage
投稿时间:2022-08-31  
DOI:10.11654/jaes.2022-0868
中文关键词: 玉米品种    吸收  转运  营养元素
英文关键词: maize variety  cadmium  absorption  transport  nutrient element
基金项目:
作者单位E-mail
樊玉 中国农业大学资源与环境学院, 农田土壤污染防控与修复北京市重点实验室, 北京 100193  
庄重 中国农业大学资源与环境学院, 农田土壤污染防控与修复北京市重点实验室, 北京 100193  
赵丽洁 中国农业大学资源与环境学院, 农田土壤污染防控与修复北京市重点实验室, 北京 100193  
张晨 中国农业大学资源与环境学院, 农田土壤污染防控与修复北京市重点实验室, 北京 100193  
王琪 中国农业大学资源与环境学院, 农田土壤污染防控与修复北京市重点实验室, 北京 100193  
李花粉 中国农业大学资源与环境学院, 农田土壤污染防控与修复北京市重点实验室, 北京 100193  
万亚男 中国农业大学资源与环境学院, 农田土壤污染防控与修复北京市重点实验室, 北京 100193 wanyanan@cau.edu.cn 
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中文摘要:
      低累积品种筛选是降低作物镉含量,减少人体摄入镉的一种有效方法。本研究通过营养液培养试验,分析了24个玉米品种苗期吸收、转运、累积镉的特性及与其他营养元素之间的相关关系。结果表明:24个玉米品种对镉的吸收和转运存在显著性差异,地上部镉含量范围为40.8~83.8 μg·g-1(以干质量计),根吸镉量为544~1 204 μg·g-1(以干质量计),相差1倍以上;转运系数为0.060~0.297,不同品种相差4倍左右。地上部镉含量与每克根镉吸收量以及地上部镉含量与镉转运系数均存在显著正相关关系。24个玉米品种按地上部镉含量大小聚类划分低、中、高3个不同镉累积的类型。同时,玉米地上部镉含量与磷、锰、铁含量呈显著负相关关系。进一步对筛选出的镉低累积型玉米品种和3个钙易累积型、8个镁易累积型、1个锌易累积的玉米品种进行综合分析,发现伟科702和登海652是兼具低累积镉和易累积营养元素特性的优势玉米品种。
英文摘要:
      With the development of mining, metallurgy, industry, and agriculture, soil cadmium contamination has become increasingly serious. Screening of low accumulation varieties is an effective method to reduce cadmium in crops and its intake by humans. The uptake and transport characteristics of cadmium and its correlation with other nutrient elements in 24 maize varieties were studied through hydroponic experiments. The results showed significant differences in the uptake, transport, and accumulation of cadmium among different varieties of maize. The cadmium content in the shoot and root ranged from 40.8 μg·g-1 to 83.8 μg·g-1(dry weight)and from 544 μg·g-1 to 1 204 μg· g-1(dry weight), respectively, with one time difference. The transport factor ranged from 0.060 to 0.297, with a difference of approximately four times. There was a significant positive correlation between cadmium content in shoot and cadmium content in root, and also between cadmium content in shoot and transport factor. All varieties were clustered and divided into three different cadmium accumulation types, and 11 types of maize were selected as low cadmium accumulation types. In addition, the cadmium content in the shoot exhibited significant negative correlations with phosphorus, manganese, and iron. Among 11 maize varieties with low cadmium accumulation, three with calcium accumulation, eight with magnesium accumulation, and one with zinc accumulation, two maize varieties (Weike 702 and Denghai 652)with low accumulation of cadmium and easy accumulation of nutrients were selected.
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