Effects of Drought Stress in Different Growth Stages on Grain Cadmium Content of Rice

doi:10.11924/j.issn.1000-6850.casb16120114

Abstract

Abstract: To explore the effect of water management on cadmium (Cd) content in rice, a pot experiment with 6 early-rice cultivars and 4 late-rice cultivars was conducted to study the effects of drought stress on grain Cd content in rice under different growth stage, including soil drying at tillering stage (T1), soil drying at booting stage (T2), soil drying at heading stage (T3), soil drying at milk stage (T4), soil drying at dough stage (T5), and whole growth season flooding (CK). The results showed that: the main effects of cultivar and water management as well as their interactive effects on Cd content in polished rice were significant (P<0.01); the Cd content in polished rice followed the sequence of T3>T1>T2>T4>T5>CK; W2 (‘C-liangyou 7’), W12 (‘Xiangwanxian 13’), W8 (‘Jinyou 59’) with low and stable Cd content in grain, can be widely planted in slight pollution soil. Significant (P<0.01) difference was observed in polished rice Cd content among cultivar types. Super hybrid rice had the highest Cd content, followed by conventional rice and hybrid rice. Growth duration had no significant effect on Cd content in polished rice.

CLC Number:

S511

易亚科 and 周志波. Effects of Drought Stress in Different Growth Stages on Grain Cadmium Content of Rice[J]. Chinese Agricultural Science Bulletin, 2018, 34(3): 1-5.

References

[1] Chaney R L, Reeves P G, Ryan J A, et al. An improved understanding of soil Cd risk to humans and low cost methods to phytoextract Cd from contaminated soils to prevent soil Cd risks[J]. Biometals, 2004, 17(5): 549-553.
[2] Wu H Y, Liao Q L, Chillrud S N, et al. Environmental exposure to cadmium: Health risk assessment and its associations with hypertension and impaired kidney function[J]. Scientific Reports, 2016, 6: 1-9.
[3] 国家环境保护总局.中东部地区生态环境现状调查报告[J].环境保护,2003,(8):3-8.
[4] 刘利成,刘三雄,黎用朝,等.水稻镉积累与调控研究进展[J].中国农学通报,2016,32(24):1-5.
[5] 滕振宁,张玉烛,方宝华,等.用AMMI双标图分析早稻稻米镉含量的基因型与环境互作效应[J].生态环境学报,2016,25(4):692-697.
[6] 纪雄辉,梁永超,鲁艳红,等.污染稻田水分管理对水稻吸收积累镉的影响及其作用机理[J].生态学报,2007,27(9):3930-3939.
[7] 杨定清,雷绍荣,李霞,等.大田水分管理对控制稻米镉含量的技术研究[J].中国农学通报,2016,32(18):11-16.
[8] 胡坤,喻华,冯文强,等.不同水分管理方式下3种中微量元素肥料对水稻生长和吸收镉的影响[J].西南农业学报,2010,23(3):772-776.
[9] 杨锚,王火焰,周健民,等.不同水分条件下几种氮肥对水稻土中外源镉转化的动态影响[J].农业环境科学学报,2006,25(5):1202-1207.
[10] 陈喆,张淼,叶长城,等.富硅肥料和水分管理对稻米镉污染阻控效果研究[J].环境科学学报,2015,35(12):4003-4011.
[11] 杜瑞英,文典,赵迪,等.Cd、Pb和As在不同品种水稻籽粒中的富集特征研究[J].生物技术进展,2016,6(2):85-90.
[12] 曾翔,张玉烛,王凯荣,等.不同品种水稻糙米含镉量差异[J].生态与农村环境学报,2006,22(1):67-69, 83.
[13] 张磊,杨惟薇,张超兰,等.不同水稻类型对镉的耐性、累积性与转运性质研究[J].西南农业学报,2013,26(6):2185-2188.
[14] 徐燕玲,陈能场,徐胜光,等.低镉累积水稻品种的筛选方法研究——品种与类型[J].农业环境科学学报,2009,28(7):1346-1352.
[15] 刘昭兵,纪雄辉,彭华,等.水分管理模式对水稻吸收累积镉的影响及其作用机理[J].应用生态学报,2010,21(4):908-914.
[16] 李剑睿,徐应明,林大松,等.水分调控和钝化剂处理对水稻土镉的钝化效应及其机理[J].农业环境科学学报,2014,33(7):1316-1321.