Application of herbicides is likely to reduce greenhouse gas (N2O and CH4) emissions from rice–wheat cropping systems

Jiang, Jingyan; Chen, Linmei; Sun, Qing; Sang, Mengmeng; Huang, Yao

doi:10.1016/j.atmosenv.2015.02.029

Cited by 27 publications

(9 citation statements)

References 37 publications

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“…The global use of agrochemicals was expected to rise 2.7 times over the next 50 years, owing to their irrefutable economic benefits in agricultural practices (Jiang et al, 2015). Different herbicides vary in their effects on greenhouse gas emissions due to differences in their mechanism of action and molecular structures.…”

Section: Effect Of Herbicides On Global Warming Potential In the Soilmentioning

confidence: 99%

“…Gianessi (2013) demonstrated that the use of herbicides reduced GHG emissions by reducing the fuel consumption of traditional farming machinery that would otherwise be used to manage weeds. Jiang et al (2015) demonstrated that the application of Butachlor and Bensulfuron-methyl in winter wheat fields reduced N 2 O emissions. The application of these herbicides to irrigated rice fields significantly reduced CH 4 and N 2 O fluxes.…”

Section: Introductionmentioning

confidence: 99%

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Herbicide applications increase greenhouse gas emissions of alfalfa pasture in the inland arid region of northwest China

Shi¹,

Guo²,

Ning³

et al. 2020

PeerJ

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Herbicides are used to control weeds in agricultural crops such as alfalfa (Medicago sativa L.), which is a forage crop. It is unclear what, if any, effect herbicides have on greenhouse gas (GHG) emissions when used on alfalfa. Our study was conducted in 2017 and 2018 to investigate the effects of two herbicides (Quizalofop-p-ethyl, QE and Bentazone, BT) on methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2O) emissions from soil planted with alfalfa. QE is used to control grasses and BT is used for broadleaf weed control. Soil CO2 emissions and soil uptake of CH4 increased significantly in both years following the QE and BT treatments, although CO2 emissions differed significantly between the trial years. N2O emissions decreased relative to the control and showed no significant differences between the trial years. The application of QE and BT on alfalfa resulted in a significant increase in CO2 emissions which contributed to a significant increase in GHG emissions. The application of QE influenced GHG emissions more than BT. We demonstrated the potential effect that herbicide applications have on GHG fluxes, which are important when considering the effect of agricultural practices on GHG emissions and the potential for global warming over the next 100 years.

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Section: Effect Of Herbicides On Global Warming Potential In the Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Herbicide applications increase greenhouse gas emissions of alfalfa pasture in the inland arid region of northwest China

Shi¹,

Guo²,

Ning³

et al. 2020

PeerJ

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“…However, ammonium N was responsible for 59.7-97.7 % of total N 2 O emissions across the soil profiles of two paddy soils (alkaline and neutral) at 60 % of water-holding capacity (Lan et al 2014). Jiang et al (2014Jiang et al ( , 2015 reported that the herbicide butachlor could enhance N 2 O emissions by up to 177.5 % over the rice-growing season, which was ascribed to the increase in soil ammonium nitrogen and nitrate nitrogen that resulted from application of this herbicide. However, the herbicides acetochlor, tribenuron-methyl, and fenoxaprop-p-ethyl reduced N 2 O emissions by 31 % in wheat fields, as a result of low soil ammonium nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Effects of Arbuscular Mycorrhizal Fungi on N2O Emissions from Rice Paddies

Zhang

Wang

et al. 2015

Water Air Soil Pollut

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Arbuscular mycorrhizal fungi (AMF) can alter the dynamics of soluble nitrogen in paddy field soils by promoting nitrogen assimilation by rice. However, it is unknown whether this affects N 2 O emissions from rice paddies. This study was designed to assess the effects of AMF on N 2 O emissions by analyzing the relationships between AMF and the parameters affecting N 2 O emissions. Path analysis was used to quantitatively partition the direct and indirect effects of different parameters on N 2 O emissions. Results showed that N 2 O emissions were controlled by environmental pathways (transpiration, evaporation, and precipitation affecting soil water content) and biotic pathways (soluble nitrogen assimilation by the rice, which varies according to rice biomass). Under different water conditions, the contributions of the two pathways to N 2 O emissions varied strongly. During the flooding stage, the environmental pathways were dominant, but inoculation with AMF promoted the contribution of the biotic pathway to the reduction of N 2 O emissions. During the draining stage, the environmental pathways were dominant in the non-inoculated treatment, but inoculation made the biotic pathways dominant by increasing the biomass of rice. During the growing stage, N 2 O emissions from inoculated soil (17.9-492.9 μg N 2 O-N m −2 h −1 ) were significantly lower than those in noninoculated soil (22.1-553.1 μg N 2 O-N m −2 h −1 ; p<0.05). Consequently, inoculating with AMF has the potential for mitigating N 2 O emissions from rice paddies.

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“…Several strategies for managing rice crops, such as from fertilizer and herbicide application to straw or water management, are aiming to increase rice production. However, such management strategies may also increase or decrease CO 2 , CH 4 , and/or N 2 O emissions (Jiang, Chen, Sun, Sang, & Huang, ; Launio, Asis, Manalili, & Javier, ; Li et al, ; Li, Wang, et al, ; Li, Zhang, Guo, Cai, & Cao, ; Liu et al, ; Trinh et al, ; Wang, Wu, et al, ; Zhang et al, ; Zhang, Chen, Liu, Cao, & Li, ). Many of these studies have reported links between GHG emissions and various soil traits, such as pH (Wang, Lai, et al, ), redox potential, (Fan et al, ; Wang, Lai, et al, ; Wang, Sardans, et al, ), salinity (Olsson et al, ), sulfate concentration (Dong et al, ; Theint, Suzuki, Ono, & Bellingrath‐Kimura, ; Wang, Lai, et al, ; Wang, Sardans, et al, ), N content (Wang et al, ; Wang, Lai, et al, ; Wang, Sardans, et al, ; Zhao et al, ; Zheng, Zhang, & He, ; Zhu, Zhang, & Cai, ), and soil P concentration (Adhya, Pattnaik, Satpathy, Kumaraswamy, & Sethunathan, ; Sheng et al, ; Zheng et al, ).…”

Section: Introductionmentioning

confidence: 99%

Multiple trade‐offs between maximizing yield and minimizing greenhouse gas production in Chinese rice croplands

Wang

Sardans

et al. 2020

Land Degrad Dev

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Globally, paddy fields are a major anthropogenic source of greenhouse gas (GHG) emissions from agriculture. There is, however, limited understanding of relationships between GHG production with fertilizer management, rice varieties, and soil variables. This information is crucial for minimizing the climatic impacts of rice agriculture. Here, we examined the relationships between soil GHG production and management practices throughout China. The current doses of N‐fertilizer (73–272 kg ha−1) were negatively correlated with rice yield and with CO2 or CH4 production and positively correlated with N2O production, thus suggesting N‐overfertilization. Impacts on soil traits such as decreasing pH or the availabilities of other nutrients could be underlying these relationships. Rice yield was highest, and GHG production was lowest at sites using intermediate levels of P‐ and K‐fertilization. CO2 and CH4 production and emissions were positively related with soil water content. The yield was higher, and N2O productions were lower at the sites with japonica rice. Our results strongly suggest that current high doses of N‐fertilizers could be reduced to thus avoid the negative effects of excessive N input on GHG production without any immediate risk of rice production loss. Current intermediate doses of P‐ and K‐fertilization should be adopted across China to further improve rice production without the risk of GHG emissions. The use of different rice varieties and strategies of water management should be reexamined in relation to crop production and GHG mitigation.

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Application of herbicides is likely to reduce greenhouse gas (N2O and CH4) emissions from rice–wheat cropping systems

Cited by 27 publications

References 37 publications

Herbicide applications increase greenhouse gas emissions of alfalfa pasture in the inland arid region of northwest China

Herbicide applications increase greenhouse gas emissions of alfalfa pasture in the inland arid region of northwest China

Effects of Arbuscular Mycorrhizal Fungi on N2O Emissions from Rice Paddies

Multiple trade‐offs between maximizing yield and minimizing greenhouse gas production in Chinese rice croplands

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