Effects of biochar amendment on the net greenhouse gas emission and greenhouse gas intensity in a Chinese double rice cropping system

Liu, Jieyun; Shen, Jianlin; Li, Yong; Su, Yirong; Ge, Tida; Jones, Davey L.; Wu, Jinshui

doi:10.1016/j.ejsobi.2014.09.001

Cited by 102 publications

(32 citation statements)

References 40 publications

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“…Biochar application pyrolyzed at 350°C-550°C from wheat straw at 40 t•ha − 1 , with and without N heightened the CH 4 emission by 34% and 41%, respectively [26], CO 2 emission by 12% [29] and 44.9% from municipal biowaste biochar in rice [123]. It was also reported that 24 t and 48 t•ha − 1 of biochar applied from pyrolysis (500°C) of wheat straw increased the emission of N 2 O by 150% and 190%, respectively [124].…”

Section: Effects On Ghg Emissionmentioning

confidence: 90%

Risk Evaluation of Pyrolyzed Biochar from Multiple Wastes

Ndirangu

Liu

et al. 2019

Journal of Chemistry

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This paper aims at demonstrating the significance of biochar risk evaluation and reviewing risk evaluation from the aspects of pyrolysis process, feedstock, and sources of hazards in biochar and their potential effects and the methods used in risk evaluation. Feedstock properties and the resultant biochar produced at different pyrolysis process influence their chemical, physical, and structural properties, which are vital in understanding the functionality of biochar. Biochar use has been linked to some risks in soil application such as biochar being toxic, facilitating GHGs emission, suppression of the effectiveness of pesticides, and effects on soil microbes. These potential risks originate from feedstock, contaminated feedstock, and pyrolysis conditions that favor the creation of characteristics and functional groups of this nature. These toxic compounds formed pose a threat to human health through the food chain. Determination of toxicity levels is a first step in the risk management of toxic biochar. Various sorption methods of biochar utilized low-cost adsorbents, engineered surface functional groups, and nZVI modified biochars. The mechanisms of organic compound removal was through sorption, enhanced sorption, modified biochar, postpyrolysis thermal air oxidation and that of PFRs degradation was through activation, photoactive functional groups, magnetization, and hydrothermal synthesis. Emissions of GHGs in soils amended with biochar emanated through physical and biotic mediated mechanisms. BCNs have a significance in reducing the health quotient indices for PTEs risk contamination by suppressing cancer risk arising from consumption of contaminated food. The degree of environmental risk assessment of HM pollution in biomass and biochars has been determined by using potential ecological risk index and RAC while organic contaminant degradation by EPFRs was considered when assessing the environmental roles of biochar in regulating the fate of contaminants removal. The magnitude of technologies’ net benefit must be considered in relation to the associated risks.

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Section: Effects On Ghg Emissionmentioning

confidence: 90%

Risk Evaluation of Pyrolyzed Biochar from Multiple Wastes

Ndirangu

Liu

et al. 2019

Journal of Chemistry

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“…To test model performance against independent data, we chose part of site‐level data for calibration and the other part for validation (section 3.1). The details on these agroecosystem experimental observations information have been documented in Tables S2–S4 (cited with Cai et al, ; Cui et al, ; Ding et al, ; Dong et al, ; Feng et al, ; Han et al, ; Hu et al, ; Jing et al, ; Li et al, ; Liu, Li, et al, ; Liu, Qu, et al, ; Liu, Wang, et al, , Liu, Zhang, et al, ; Liu et al, , ; Ma et al, ; Mo et al, , ; Pan et al, ; Wei et al, ; Xiao et al, ; Yang et al, , ; Yu et al, ; Zhai et al, ; Zhao et al, ; Zhang et al, , etc.) in the supporting information.…”

Section: The Dlemmentioning

confidence: 99%

Improving Representation of Crop Growth and Yield in the Dynamic Land Ecosystem Model and Its Application to China

Zhang

Tian

Yang

et al. 2018

J Adv Model Earth Syst

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To accurately assess the roles of agriculture in securing food security and maintaining environmental sustainability, it is essential to improve the representation of crop growth, development, and yield formation in global land models that traditionally focus on energy, water, carbon, and nitrogen exchanges between land and the atmosphere. In this study, a process‐based agricultural module has been coupled with the Dynamic Land Ecosystem Model (DLEM‐AG2.0) for assessing how multiple environmental factors (climate change, atmospheric CO2 concentration, tropospheric O3, and nitrogen deposition) and human activities (land use/cover change, nitrogen fertilizer use, and irrigation) have affected the crop growth, development, yield, carbon (C), nitrogen (N), and water cycles in agroecosystems. Here we describe the model structure for simulating crop growth, development, and yield formation in the DLEM‐AG2.0, and then we validate the model using field observations and a national yield survey for three major crops (wheat, maize, and rice) in China during 1980–2012. Results show that the DLEM‐AG2.0 is capable of simulating the dynamic processes of phenological development, leaf growth expansion, biomass accumulation, biomass allocation, and yield formation for wheat, maize, and rice with normalized root mean square errors of the simulations of less than 20%. Our model‐based yield estimation for the three major crops at the national scale for the period 1980–2012 is generally consistent with the national yield survey in China. The crop representation in the DLEM‐AG2.0 is flexible for extrapolating to a global scale after rigorous testing with both site‐specific and regional observations. Further advancement of agricultural modeling within the global land modeling framework will require consideration of human perception and behavior for adapting and mitigating global change.

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“…Soil Rh is closely related to soil organic carbon balance ). In the future studies, it would be meaningful to consider the net greenhouse effect of CH 4 , N 2 O and soil organic carbon balance to give a comprehensive evaluation of the greenhouse effect from paddy fields as affected by straw incorporation and water regime (Li et al 2005;Liu et al 2014).…”

Section: Co 2 E and Ghgimentioning

confidence: 99%

“…Gases were sampled during 9:00 am -11:00 am every week (twice a week during the first 10 days after the applications of N fertilizers or during the mid-season-drainage periods). Detailed information on the gas sampling and analysis can be found in Shen et al (2014) and Liu et al (2014).…”

Section: Ghg Sampling and Measurementmentioning

confidence: 99%

Greenhouse gas emissions in response to straw incorporation, water management and their interaction in a paddy field in subtropical central China

Shen

Tang

Inubushi

et al. 2016

Archives of Agronomy and Soil Science

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A field experiment was conducted to study the effects of combination of straw incorporation and water management on fluxes of CH 4 , N 2 O and soil heterotrophic respiration (Rh) in a paddy field in subtropical central China, by using a static opaque chamber/gas chromatography method. Four treatments were set up: two rice straw incorporation rates at 0 (S1) and 6 (S2) t ha -1 combined with two water managements of intermittent irrigation (W1, with midseason drainage) and continuous flooding (W2, without midseason drainage). The cumulative seasonal CH 4 emissions for the treatments of S1W2, S2W1, S2W2 increased Downloaded by [University of Tennessee, Knoxville] at 03:26 06 June 2016significantly by 1.84, 5.47 and 6.63 times, respectively, while seasonal N 2 O emissions decreased by 0.67, 0.29 and 1.21 times, respectively, as compared to S1W1 treatment. The significant increase in the cumulative Rh for the treatments S1W1, S2W1 and S2W2 were 0.54, 1.35 and 0.52 times, respectively, in comparison with S1W2. On a seasonal basis, both the CO 2 -equivalents (CO 2 e) and yield-scaled CO 2 e (GHGI) of CH 4 and N 2 O emissions increased with straw incorporation and continuous flooding, following the order: S2W2>S2W1>S1W2>S1W1. Thus, the practices of in season straw incorporation should be discouraged, while midseason drainage is recommended in paddy rice production from a point view of reducing greenhouse gas emissions.

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Effects of biochar amendment on the net greenhouse gas emission and greenhouse gas intensity in a Chinese double rice cropping system

Cited by 102 publications

References 40 publications

Risk Evaluation of Pyrolyzed Biochar from Multiple Wastes

Risk Evaluation of Pyrolyzed Biochar from Multiple Wastes

Improving Representation of Crop Growth and Yield in the Dynamic Land Ecosystem Model and Its Application to China

Greenhouse gas emissions in response to straw incorporation, water management and their interaction in a paddy field in subtropical central China

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