摘要
选取2种地质高背景农田土壤(马岭和云表),盆栽条件下种植7种不同水稻品种(宁两优1号、Y两优1号、深两优、泰两优、粤晶丝苗、油占八号和黄华占),分析比较不同水稻对Cd的吸收累积特征,并探究可能的影响因素.结果表明:(1)两种地质高背景土壤下种植的7种水稻稻米Cd含量均未超标(GB 2762-2017),其中深两优稻米Cd含量最低;(2)7种水稻稻米Cd含量均表现出在马岭土壤种植的高于在云表土壤种植的;(3)冗余和相关分析发现,稻米Cd累积主要是受水稻株高、根表面积、土壤全Cd含量、抽穗期土壤EC和Eh等因素影响.两种土壤中影响稻米Cd累积的主要因素存在差异:云表土壤下稻米Cd含量与水稻根长呈极显著相关;马岭土壤下稻米Cd含量与水稻地上部生物量呈极显著相关.
The cadmium(Cd)accumulation characteristics of seven rice varieties(Ningliangyou 1,Y Liangyou 1,Shenliangyou,Tailiangyou,Yuejingsimiao,Youzhanbahao,and Huang Huazhan)were studied by pot-culture experiments in two paddy soils(Maling,Yunbiao)with different high geological backgrounds,and the possible impacting factors were explored.The results indicated that:①The grain Cd contents of the seven rice varieties grown in the two soils did not exceed the national food safety standard(GB 2762-2017),and the grain Cd content of Shengliangyou was the lowest;②The grain Cd content of the seven rice varieties planted in the soil of Maling was higher than those of Yunbiao;③The redundancy analysis revealed that the accumulation of Cd in grains was influenced by the plant height,surface area of root,total cadmium in the soil,and EC and Eh of the soil during the heading stage.The correlation analysis indicated that the leading impacting factor of the grain Cd accumulation varied.In the Maling soil,the grain Cd content was primarily related to the rice root length,while it was related to the aboveground rice biomass in the Yunbiao soil.
作者
代子雯
方成
孙斌
魏志敏
胡锋
李辉信
徐莉
DAI Zi-wen;FANG Cheng;SUN Bin;WEI Zhi-min;HU Feng;LI Hui-xin;XU Li(College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2021年第4期2016-2023,共8页
Environmental Science
基金
国家重点研发计划项目(2017YFD0800305)。
关键词
水稻品种
镉累积
筛选
地质高背景农田土壤
盆栽种植
rice variety
cadmium accumulation
screening
farmland soil with high geological background
potted planting
作者简介
代子雯(1996-),女,硕士研究生,主要研究方向为土壤重金属污染修复,E-mail:2018103089@njau.edu.cn;通信作者:徐莉,E-mail:xuli602@njau.edu.cn。
