Effects of Two Foliar Inhibitors on Absorption and Accumulation of Cd in Rice and Related Health Risk Assessment

doi:10.11924/j.issn.1000-6850.casb2025-0160

Abstract

Abstract:

Addressing the challenge of safe rice production in cadmium (Cd)-contaminated farmland, this study aimed to screen commercially available high-efficiency foliar inhibitors and evaluate their application effects. Two commercially available silicon (Si)-containing foliar inhibitors (Beierke and Guilifeng) were applied at two rates (3 and 6 L/hm²) in typical Cd-contaminated farmland in Yiyang City. A treatment without foliar inhibitor application served as the control group (CK). A total of five treatment groups were sprayed at the rice booting and heading stages. The study examined their effects on rice yield, Cd content in rice grains, and the Cd bioaccumulation factor, along with a health risk assessment. The results indicated that spraying the two Si-containing foliar inhibitors (3 and 6 L/hm²) during the rice booting and heading stages increased rice yield by 4.6% to 7.7%, reduced Cd content in rice grains by 24.5% to 42.5%, and decreased the Cd bioaccumulation factor in rice grains by 24.1% to 42.3%. Both inhibitors showed optimal performance at the application rate of 6 L/hm², and under the same application rate, Beierke demonstrated superior Cd reduction compared to Guilifeng. The application of two foliar inhibitors reduced the target hazard quotient (THQ) for adults and children by 24.2% to 42.1% and 24.3% to 42.4%, respectively, mitigating the health risks associated with rice consumption for the local population. In conclusion, the application of commercially available Si-containing foliar inhibitors during the rice booting and heading stages can increase rice yield in Cd-contaminated farmland, reduce Cd absorption and accumulation in rice grains, and mitigate health risks to human health. Among then, the use of Beierke foliar inhibitor at a dosage of 6 L/hm² yielded the best result. Future efforts should combine soil amendments (such as lime) to adjust soil pH and further reduce Cd content in rice to meet national standards, thereby providing a more comprehensive technical solution for the safe utilization of Cd-contaminated farmland.

Key words: foliar inhibitor, Cd contaminated farmland, rice, bioaccumulation factor, health risk

XU Junhui, CHEN Lini, HUANG Fang, LIAN Cong, MO Bocheng. Effects of Two Foliar Inhibitors on Absorption and Accumulation of Cd in Rice and Related Health Risk Assessment[J]. Chinese Agricultural Science Bulletin, 2026, 42(2): 113-119.

Figures/Tables 6

References 34

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序号	名称	用量
1	对照(CK)	不施用叶面阻控剂
2	T1	施用贝尔壳叶面阻控剂3 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为1.5 L/hm²
3	T2	施用贝尔壳叶面阻控剂6 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为3 L/hm²
4	G1	施用硅利丰叶面阻控剂3 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为1.5 L/hm²
5	G2	施用硅利丰叶面阻控剂6 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为3 L/hm²

序号	名称	用量
1	对照(CK)	不施用叶面阻控剂
2	T1	施用贝尔壳叶面阻控剂3 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为1.5 L/hm²
3	T2	施用贝尔壳叶面阻控剂6 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为3 L/hm²
4	G1	施用硅利丰叶面阻控剂3 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为1.5 L/hm²
5	G2	施用硅利丰叶面阻控剂6 L/hm²，于水稻破口期与齐穗期各喷施一次，每次喷施量为3 L/hm²

处理方式	THQ
处理方式	成人	儿童
CK	1.90	2.76
T1	1.28	1.86
T2	1.10	1.59
G1	1.44	2.09
G2	1.21	1.75

处理方式	THQ
处理方式	成人	儿童
CK	1.90	2.76
T1	1.28	1.86
T2	1.10	1.59
G1	1.44	2.09
G2	1.21	1.75