Effects of Microplastics on Soil N2O Emission and Nitrogen Transformations from Tropical Agricultural Soils

被引：0

作者：

Wang, Xiao-Tong ^{[1
,2
]}

Leng, You-Feng ^{[2
]}

Wang, Jun-Jiao ^{[2
,3
]}

Huang, Xiao-Min ^{[2
,4
]}

Fu, Ya-Jun ^{[1
,2
]}

Fan, Chang-Hua ^{[2
,5
]}

Gao, Wen-Long ^{[2
,5
]}

Zhang, Wen ^{[2
,5
]}

Ning, Zi-Yu ^{[2
,5
]}

Chen, Miao ^{[2
,5
]}

机构：

[1] College of Ecology and Environment, Hainan University, Haikou

[2] Key Laboratory of Low-carbon and Green Agriculture in Tropical China, Ministry of Agriculture and Rural Affairs, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou

[3] College of Tropical Agriculture and Forestry, Hainan University, Haikou

[4] College of Resources and Environment, Huazhong Agricultural University, Wuhan

[5] Hainan Danzhou Tropical Agro-ecosystem National Observation and Research Station, Danzhou

来源：

Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 10期

关键词：

functional genes; microplastics（MPs）; N[!sub]2[!/sub]O emissions; nitrogen transformation; soil properties;

D O I：

10.13227/j.hjkx.202310172

中图分类号：

学科分类号：

摘要：

A widespread concern had been there regarding soil ecological and environmental problems caused by microplastic pollution in agricultural soils. A controlled laboratory incubation experiment was performed to examine the effects of different types of microplastics on soil properties，N2O emissions，and nitrogen（N）transformations in tropical arable soils from a pepper-corn cropping system in Hainan Province. Three treatments were done：soil without microplastics（CK）and soil amended with 5% of polyethylene（PE）or with 5% of polybutylene adipate co-terephthalate（PBAT）. The results showed that both types of microplastic addition increased soil pH，soil organic carbon（SOC），and dissolved organic carbon（DOC）contents，with stronger treatment effects observed for PBAT than those for the PE treatment. In addition，the PE and PBAT treatments increased soil ammonium nitrogen（NH4+-N）contents by 66.07% and 119.65% and decreased nitrate nitrogen（NO3--N）contents by 8.56% and 29.68%，respectively. Compared to those in the CK treatment，the addition of PBAT significantly increased soil N2O emissions by 254.92%（P < 0.05），whereas that of PE produced no significant effects. Furthermore，both the PE and PBAT treatments increased soil net nitrogen mineralization rate（NMR）and decreased soil net nitrification rate（NNR），with more obvious treatment effects observed in PBAT than in the PE treatment. PBAT addition increased the abundance of ureC，while PE had no significant effects. Microplastic addition reduced the abundance of nitrifying gene abundances（AOAamoA，AOB-amoA，and nxrA），with more obvious treatment effects found in the PBAT treatment. Further，PBAT addition significantly increased the gene abundances of nirK，nirS，nosZ，and fungal nirK（P< 0.05），whereas the addition of PE had no significant effect on those gene abundances. Soil N2O emissions had positive relationships with NH4+-N intensity，pH，DOC，SOC，and nirS abundance. In conclusion，biodegradable microplastics addition produced stronger influences on soil properties and N transformations than the non-biodegradable one in tropical arable soils and aggravated soil N2O emissions mainly by promoting denitrification. © 2024 Science Press. All rights reserved.

引用

页码：6139 / 6147

页数：8

共 47 条

[1] Liu H S, Li Y F，, Pan B B，, Et al., Pathways of soil N<sub>2</sub>O uptake，consumption，and its driving factors：a review［J］, Environmental Science and Pollution Research, 29, 21, pp. 30850-30864, (2022)
[2] Tian H Q，, Xu R T，, Canadell J G，, Et al., A comprehensive quantification of global nitrous oxide sources and sinks［J］, Nature, 586, 7828, pp. 248-256, (2020)
[3] Lin W，, Zhang W，, Li Y Z，, Et al., Effects of combined application of manure and inorganic fertilizer on N<sub>2</sub>O emissions and sources in vegetable soils ［J］, Transactions of the Chinese Society of Agricultural Engineering, 32, 19, pp. 148-153, (2016)
[4] Zhou Y J, Wang J X，, Zou M M，, Et al., Microplastics in soils：a review of methods，occurrence，fate，transport，ecological and environmental risks［J］, Science of the Total Environment, (2020)
[5] Zhang X Y，, Li Y，, Ouyang D，, Et al., Systematical review of interactions between microplastics and microorganisms in the soil environment ［J］, Journal of Hazardous Materials, (2021)
[6] Thompson R C，, Olsen Y，, Mitchell R P，, Et al., Lost at sea：Where is all the plastic？［J］, Science, 304, 5672, (2004)
[7] Yang L, Zhang Y L, Kang S C，, Et al., Microplastic pollution in soil in China［J］, Chinese Journal of Nature, 43, 4, pp. 267-273, (2021)
[8] He D F，, Luo Y M，, Lu S B，, Et al., Microplastics in soils：analytical methods，pollution characteristics and ecological risks［J］, TrAC Trends in Analytical Chemistry, 109, pp. 163-172, (2018)
[9] Zhang M J, Zhao Y R，, Qin X，, Et al., Microplastics from mulching film is a distinct habitat for bacteria in farmland soil［J］, Science of the Total Environment, 688, pp. 470-478, (2019)
[10] Fitschen K，, Rillig M C., Abiotic and biotic factors influencing the effect of microplastic on soil aggregation［J］, Soil Systems, 3, 1, (2019)

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