Combined Effects of Soil Amendment and Zinc Fertilizer on Accumulation and Transportation of Cadmium in Soil-Rice System

被引：0
|
作者：
Zhou K.-H. [1 ]
Zhou H. [1 ,2 ]
Wang Z.-Y. [1 ]
Liu Y. [1 ]
Liu J.-W. [1 ]
Gu J.-F. [1 ,2 ]
Zeng P. [1 ,2 ]
Liao B.-H. [1 ,2 ]
机构：
[1] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha
[2] Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha
来源：
Huanjing Kexue/Environmental Science | 2021年 / 42卷 / 09期
关键词：
Cd contaminated soil; Combined amendment; Foliar resistance control; Rice; Zinc fertilizer;
D O I：
10.13227/j.hjkx.202101150
中图分类号：
学科分类号：
摘要：
A field experiment was conducted in moderately and severely Cd contaminated paddy fields in Beishan Town, Changsha City, Hunan Province. This study examined the effects of LS amendment (limestone+sepiolite), in combination with soil application and foliar spraying of Zn fertilizer, on Cd uptake in early and late rice plants. The results showed that: ① the application of LS (2 250 kg•hm-2 and 4 500 kg•hm-2) significantly increased pH and CEC values in paddy soil during the early and late rice seasons, but the addition of Zn fertilizer (90 kg/hm2) to soil and through foliar spraying (0.2 g•L-1 and 0.4 g•L-1) had no significant effects on the pH or CEC of the soil. ② LS application decreased concentrations of TCLP-Cd and CaCl2-Cd in the soils, by 11.5%-38.8% and 24.0%-81.0%, respectively, while neither of the treatments involving the addition of Zn fertilizer to soil or through foliar spraying had any significant effects on the concentrations of TCLP-Cd and CaCl2-Cd. ③Single treatments involving only LS amendment, Zn fertilizer in soil, or foliar spraying of Zn fertilizer also reduced Cd concentrations in brown rice, but to a lesser degree than the combined treatments. The combined treatments (L1Z1F1, L1Z1F2, L2Z1F1, and L2Z1F2) reduced Cd concentrations in brown rice by 64.9%-67.5% and 56.1%-80.6%, for early and late rice, respectively, while L2Z1F1 (4 500 kg•hm-2 LS+90 kg•hm-2 Zn fertilizer+foliar spraying 0.2 g•L-1 Zn fertilizer) resulted in the largest reduction in Cd concentration in brown rice. ④ The Cd/Zn ratio in brown rice was significantly positively correlated with Cd concentrations, indicating that increased Zn concentration in different rice tissues was one of the key reasons for decreased Cd concentration in brown rice. Clearly, as a remediation technology, combining LS amendments with zinc fertilizer is an effective method for achieving the safe utilization of moderately and severely Cd contaminated paddy fields, by effectively inhibiting the uptake, accumulation, and transportation of Cd in rice plants and decreasing Cd concentrations in brown rice. © 2021, Science Press. All right reserved.
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页码：4452 / 4461
页数：9
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共 48 条
  • [1] Yuan S S, Xiao X Y, Guo Z H., Regional distribution of cadmium minerals and risk assessment for potential cadmium pollution of soil in China, Environmental Pollution and Control, 34, 6, pp. 51-56, (2012)
  • [2] (2014)
  • [3] Li J, Zhou Y W, Chen S, Et al., Actualities, damage and management of soil cadmium pollution in China, Anhui Agricultural Science Bulletin, 21, 24, pp. 104-107, (2015)
  • [4] Feng W Q, Tu S H, Qin Y S, Et al., Uptake capacity of different rice genotypes for lead and cadmium from soil, Journal of Agro-Environment Science, 27, 2, pp. 447-451, (2008)
  • [5] 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, Biometals, 17, 5, pp. 549-553, (2004)
  • [6] Shen Q, Dang X L., Review of soil heavy metal cadmium pollution and remediation technology, Journal of Anhui Agricultural Sciences, 43, 15, pp. 92-94, (2015)
  • [7] Li J R, Xu Y M, Lin D S, Et al., In situ immobilization remediation of heavy metals in contaminated soils: a review, Ecology and Environmental Sciences, 23, 4, pp. 721-728, (2014)
  • [8] Fang Z P, Liao M, Zhang N, Et al., Effect of sepiolite application on the migration and redistribution of Pb and Cd in soil rice system in soil with Pb and Cd combined contamination, Environmental Science, 38, 7, pp. 3028-3035, (2017)
  • [9] Chen S H, Zhang Y P, Li F, Et al., Remediation of Cd-polluted paddy soils using amendments combined with agronomic measures, Journal of Agro-Environment Science, 38, 3, pp. 563-572, (2019)
  • [10] ur Rehman M Z, Khalid H, Akmal F, Et al., Effect of limestone, lignite and biochar applied alone and combined on cadmium uptake in wheat and rice under rotation in an effluent irrigated field, Environmental Pollution, 227, pp. 560-568, (2017)
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