摘要
为揭示影响燕麦籽粒镉(Cd)含量的关键因素,以18个燕麦品种为研究对象,分别于2020年和2021年开展连续2期大田试验,研究燕麦不同器官间Cd富集转运对籽粒Cd含量的影响,并通过聚类分析、THQ值进行低Cd积累品种筛选和安全风险评价;通过相关性分析和主成分分析评估影响籽粒Cd含量的关键器官和关键过程。结果表明:坝燕7号、201229-1-1、200919-7-1、坝莜14号、坝燕6号、白燕9号等13个品种为籽粒Cd低积累型品种,坝燕4号、燕科2号、蒙燕2号、白燕17号为籽粒Cd高积累型品种,分别占供试品种的72.22%和22.22%;燕麦籽粒Cd含量与茎中Cd富集系数及Cd从根到籽粒、茎到籽粒、叶到籽粒的转运系数呈极显著正相关;在主成分分析中,茎中Cd的富集系数及Cd从根到籽粒、茎到籽粒、叶到籽粒的转运系数对区分高、低Cd积累燕麦品种贡献较大。因此,茎是影响燕麦籽粒Cd含量差异的关键器官,Cd从根到籽粒、茎到籽粒、叶到籽粒的转运过程是造成燕麦籽粒Cd含量差异的关键转运过程。
To reveal the key influencing factors affecting the Cd content of oat grains,18 oat varieties were taken as research objects,and two consecutive field trials were carried out in 2020 and 2021 to study the effect of Cd enrichment and transport between different organs of oat on grain Cd content.Cluster analysis was applied to determine the THQ value to screen low Cd accumulation varieties,and a safety risk assessment was conducted through correlation analysis and principal components to analyze the key organs and key processes affecting grain Cd enrichment.The results showed that 13 cultivars,including Bayan No.7,201229-1-1,2009-7-1,Bayou No.14,Bayan No.6,and Baiyan No.9,had low-accumulation varieties of Cd in grains,and Bayan No.4,Yanke No.2,Mengyan No.2,and Baiyan No.17 had a high accumulation.The concentration factor and Cd transport coefficient from root to grain,stem to grain,and leaf to grain were significantly positively correlated,and the transport coefficient to the grain contributed significantly to the differentiation between high and low Cd accumulation oat cultivars.Therefore,the stem is the key organ that affects the difference in Cd content in oat grains,and the transport of Cd from root to grain,stem to grain,and leaf to grain is the key transport process that causes the difference in Cd content in oat grains.
作者
马凤仪
赵宝平
张茹
杨波
王永宁
郭晓宇
陈淼
刘景辉
MA Fengyi;ZHAO Baoping;ZHANG Ru;YANG Bo;WANG Yongning;GUO Xiaoyu;CHEN Miao;LIU Jinghui(College of Agriculture,Inner Mongolia Agricultural University,Hohhot 010010,China;Inner Mongolia Agriculture and Animal Husbandry Ecological and Resource Protection Center,Hohhot 010000,China;Bayannaoer City Cultivated Land Quality Monitoring and Protection Center,Bayannaoer 015000,China;Urad Rear Banner Eco-Energy and Environmental Protection Station in a Rural Pastoral Area,Bayannaoer 015500,China)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2022年第11期2458-2467,共10页
Journal of Agro-Environment Science
基金
财政部和农业农村部:国家现代农业产业技术体系
农业农村部耕地重金属污染防治联合公关项目。
关键词
燕麦
镉
富集系数
转运系数
安全风险评价
oat
cadmium
enrichment coefficient
transport coefficient
safety risk assessment
