Organic fertilizer amendment increases methylmercury accumulation in rice plants

Li, Yunyun; He, Xu‐Cheng; Wang, Yongjie; Guan, Jiaxun; Guo, Jingxia; Xu, Bo; Chen, Yanhui; Guo, Weihua

doi:10.1016/j.chemosphere.2020.126166

Cited by 13 publications

(4 citation statements)

References 37 publications

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“…Thus, the overall performance of applying insect feces was still to reduce the absorption and accumulation of heavy metals in crops, which is similar to the results of Zhang et al (2020). In 2019, the contents of Cd and Pb in each part of rice decreased with the rise of the application amount of insect feces, which was consistent with the previous research (Li et al 2020b;Xiao et al 2017). In 2018, the Cd and Pb contents in each part of rice treated with 4% insect feces were the lowest, while those treated with 6% and 8% insect feces were elevated.…”

Section: Discussionsupporting

confidence: 90%

Effect of insect feces (Hermetia illucens) on rice growth and heavy metal migration from polluted soil to rice plant

Wang

Xiang

et al. 2021

Environ Sci Pollut Res

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Insect feces are a new kind of biological organic fertilizer. Little is known about the in uences of insect feces on rice growth and heavy metal migration from soil to rice plant. In this study, the effects of different amounts (CK (0%), T1 (2%), T2 (4%), T3 (6%), and T4 (8%) ) of black soldier y larvae (BSFL) feces on the rice growth and the migration/accumulation of heavy metals (Cd and Pb) were investigated by pot experiments within two years. The application of insect feces remarkably increased the contents of soil pH, organic matter, ammonium nitrogen, available phosphorus and potassium. Meanwhile, the insect feces application reduced the weak acid soluble contents of soil Cd and Pb by 8.3-56.8%, but increased those in the oxidizable (by 22.4-165.7%) and residual (by 1.8-225.6%) states. Except for the T4 treatment in the rst year, all fertilization treatments increased the rice yield (up to 43.7% and 195.5% higher than those of CK within two years). Moreover, the insect feces application reduced the contents of Cd (8.3%-66.7%) and Pb (6.4%-61.8%) in different parts of rice. Under the same treatment, the metal contents in each part of rice in the second year were lower than those in the rst year. The insect feces application decreased the absorption coe cients (24.4%-57.5%) and secondary transport coe cients

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Section: Discussionsupporting

confidence: 90%

Effect of insect feces (Hermetia illucens) on rice growth and heavy metal migration from polluted soil to rice plant

Wang

Xiang

et al. 2021

Environ Sci Pollut Res

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“…The application of organic fertilizers increased the input of SOC www.nature.com/scientificreports/ and TN directly. Moreover, organic fertilizer could promote the growth of crops by releasing phenols, vitamins, enzymes, auxins and other substances during the decomposition process, thus the SOC derived from crops would be increased 37,39 . In addition, organic fertilizers provide various nutrients for microbial reproduction, which increase the microbial population and organic carbon and total nitrogen content 37 .…”

Section: Responses Of Soc Tn and C:n To Different Chemical Nitrogen F...mentioning

confidence: 99%

The responses of soil organic carbon and total nitrogen to chemical nitrogen fertilizers reduction base on a meta-analysis

Aluko

Yuan

et al. 2022

Sci Rep

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Soil organic carbon (SOC), total nitrogen (TN), and their ratio (C:N) play important roles in preserving soil fertility, and their values are closely related to fertilizer use. However, the overall trend and magnitude of changes in SOC, TN and C:N in response to chemical nitrogen fertilizers reduction remain inconclusive. Here, the meta-analysis conducted comparisons at 48 sites covering various cropping system, soil type, and climatic regions of China to investigate the responses of SOC, TN and C:N to chemical nitrogen fertilizers reduction. The results showed that chemical nitrogen fertilizers reduction decreased SOC by 2.76 ± 0.3% and TN by 4.19 ± 0.8%, and increased the C:N by 6.11 ± 0.9% across all the database. Specifically, the reduction of chemical nitrogen without adding organic nitrogen fertilizers would reduce SOC and TN by 3.83% and 11.46% respectively, while they increased SOC and TN by 4.92% and 8.33% respectively with organic fertilizers supplement, suggesting that organic fertilizers could cover the loss of SOC, TN induced by chemical nitrogen fertilizers reduction. Medium magnitude (20–30%) of chemical nitrogen fertilizers reduction enhanced SOC by 6.9%, while high magnitude (≧30%) and total (100%) of chemical nitrogen fertilizers reduction significantly decreased SOC by 3.10% and 7.26% respectively. Moreover, SOC showed a negative response to nitrogen fertilizers reduction at short-term duration (1–2 years), while the results converted under medium-long-termThis system analysis fills the gap on the effects of fertilizer reduction on soil organic carbon and nitrogen at the national scale, and provides technical foundation for the action of reducing fertilizer application while increase efficiency.

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“…In addition, the physical migration of organic and inorganic complex in soil causes the redistribution of soil materials, affecting the adsorption of metals on soil particles of different particle sizes [31][32][33]. However, previous studies on the effects of soil components on mercury biogeochemical behavior were mainly conducted from the perspective of individual components, with little attention paid to the interactions among several individuals factors of various components [34][35][36][37][38][39][40][41][42][43][44]. Moreover, previous related research on Hg primarily involved adding specific components to existing soil, making it challenging to isolate the effects of the same components already present in the soil [26,41,[45][46][47].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil

Qin,

Ran,

et al. 2023

Toxics

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Soil composition can influence the chemical forms and bioavailability of soil mercury (Hg). However, previous studies have predominantly focused on the influence of individual components on the biogeochemical behavior of soil Hg, while the influence of various component interactions among several individual factors remain unclear. In this study, artificial soil was prepared by precisely regulating its components, and a controlled potted experiment was conducted to investigate the influence of various organic and inorganic constituents, as well as different soil textures resulting from their coupling, on soil Hg methylation and its bioavailability. Our findings show that inorganic components in the soils primarily exhibit adsorption and fixation effects on Hg, thereby reducing the accumulation of total mercury (THg) and methylmercury (MeHg) in plants. It is noteworthy that iron sulfide simultaneously resulted in an increase in soil MeHg concentration (277%). Concentrations of THg and MeHg in soil with peat were lower in rice but greater in spinach. A correlation analysis indicated that the size of soil particles was a crucial factor affecting the accumulation of Hg in plants. Consequently, even though fulvic acid activated soil Hg, it significantly increased the proportion of soil particles smaller than 100.8 μm, thus inhibiting the accumulation of Hg in plants, particularly reducing the concentration of THg (93%) and MeHg (85%) in water spinach. These results demonstrate that the interaction of organic and inorganic components can influence the biogeochemical behavior of soil Hg not only through their chemical properties, but also by altering the soil texture.

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Organic fertilizer amendment increases methylmercury accumulation in rice plants

Cited by 13 publications

References 37 publications

Effect of insect feces (Hermetia illucens) on rice growth and heavy metal migration from polluted soil to rice plant

Effect of insect feces (Hermetia illucens) on rice growth and heavy metal migration from polluted soil to rice plant

The responses of soil organic carbon and total nitrogen to chemical nitrogen fertilizers reduction base on a meta-analysis

The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil

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