镉低积累水稻品种筛选

Screening of low-cadmium accumulation rice varieties

采用镉低积累水稻品种是实现镉轻度污染耕地安全、高效和可持续生产的途径之一。本研究针对轻度镉污染农田开展了为期2年的镉低积累水稻品种筛选试验,并对稻米镉含量及其镉转运能力进行分析。试验结果表明,不同水稻品种的镉积累特性存在明显差异,与常规稻相比,杂交水稻对镉的积累和转移能力更强。2021年供试水稻品种稻米镉含量为0.154~0.531 mg/kg,其转移系数为0.51~1.89;2022年供试水稻品种稻米镉含量为0.024~0.346 mg/kg,其转移系数为0.08~1.31。在两年的品种筛选试验中,杂交稻甬优15,常规稻绍糯9714、宁88均能较好地适应当地环境条件,且具有较低的镉积累特性,适宜在镉轻度污染农田推广种植。本研究结果可为研究区镉轻度污染农田安全利用中水稻品种选择提供参考。

Utilizing rice varieties with low cadmium accumulation is one of the primary strategies for achieving safe,efficient,and sustainable production in slightly cadmium-contaminated paddy field.In this study,rice varieties with low cadmium accumulation were screened for a period of 2 years,and cadmium content and transport capacity of rice were analyzed.The results indicated that there were significant differences in cadmium accumulation characteristics among the rice varieties.Compared to conventional rice,hybrid varieties demonstrated higher capacities for cadmium accumulation and translocation.In 2021,the cadmium content in the rice varieties tested ranged from 0.154 to 0.531 mg/kg,with translocation coefficients ranging from 0.51 to 1.89;in 2022,these figures were 0.024 to 0.346 mg/kg and 0.08 to 1.31,respectively.Throughout the two-year variety selection trial,the hybrid rice Yongyou 15,the conventional rice varieties Shaonuo 9714,and Ning 88 adapted well to the local environmental conditions and exhibited lower characteristics of cadmium accumulation,making them suitable for promotion and cultivation in slightly cadmium-contaminated farmlands.The findings of this study provided a reference for the selection of varieties for the safe use of slightly cadmium-contaminated farmlands in the local area.