中文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 英文关键词rice varietycadmium accumulationscreeningfarmland soil with high geological backgroundpotted planting

作者	单位	E-mail
代子雯	南京农业大学资源与环境科学学院, 南京 210095	2018103089@njau.edu.cn
方成	南京农业大学资源与环境科学学院, 南京 210095
孙斌	南京农业大学资源与环境科学学院, 南京 210095
魏志敏	南京农业大学资源与环境科学学院, 南京 210095
胡锋	南京农业大学资源与环境科学学院, 南京 210095
李辉信	南京农业大学资源与环境科学学院, 南京 210095
徐莉	南京农业大学资源与环境科学学院, 南京 210095	xuli602@njau.edu.cn

中文摘要 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；②7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. 英文摘要 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:① The 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; ② The grain Cd content of the seven rice varieties planted in the soil of Maling was higher than those of Yunbiao; ③ The 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.

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