Long-term effect of biochar application on yield-scaled greenhouse gas emissions in a rice paddy cropping system: A four-year case study in south China

Qin, Xiaobo; Li, Yue; Wang, Hong; Liu, Chong; Li, Jianling; Wan, Yunfan; Gao, Qingzhu; Fan, Fenliang; Liao, Yulin

doi:10.1016/j.scitotenv.2016.06.222

Cited by 144 publications

(46 citation statements)

References 68 publications

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“…Most previous reports have shown that straw incorporation increased grain yield [43][44][45], while other studies reported the negative impacts of straw returning on rice yield [30,46]. The results of this paper displayed that the variation of rice yield was affected by the amount and the method of oilseed rape straw returning.…”

Section: Impacts Of Straw Returning On Tiller Growth and Yield Of Hybmentioning

confidence: 50%

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

et al. 2019

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Incorporating oilseed-rape straw in soil is one of the effective methods for enhancing the use efficiency of agricultural resources in the rape-rice rotation system. However, the impacts of oilseed-rape straw incorporation on root growth and dynamic changes in soil are still unclear. In order to provide a deeper understanding of the oilseed rape straw return on rice growth and productivity, the experiment was conducted in the field and in a specially-designed pots system from 2016 to 2017 by means of two straw returning methods and four straw returning amounts. In the early stage of rice growth (0–36 days after rice transplanting) the straw returning treatments decreased 1.0–8.6 mg/plant in bleeding density and 0.10–6.11, 0.06–0.31, and 0.52–0.84 μmol/(g h) in the activity of glutamine synthetase (GS), glutamic-oxalacetic transaminase (GOT), and glutamic-pyruvic transaminase (GPT), respectively. Oilseed rape straw returned by mulching induced negative impacts on new germinating roots in 0–10 cm of soil, while the negative impacts were observed on roots in 10–30 cm of soil for straw returned by plowing. In the later stage of rice growth (56–75 days after rice transplanting), oilseed rape straw returning produced some positive impacts on rice roots, which enhanced the yield of rice. Conclusively, our findings suggested that dynamic root growth and the activity of root enzymes are two major factors behind the slow reviving of rice after transplanting in the straw returning field. Plowing is a more appropriate method of straw returning than mulching in the rape-rice rotation system in the Sichuan basin area, with a straw incorporation rate of 3.0 t/hm2.

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Section: Impacts Of Straw Returning On Tiller Growth and Yield Of Hybmentioning

confidence: 50%

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

et al. 2019

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“…Yang et al [35] indicated that increased soil pH enhanced methanotroph activity and decreased CH 4 emissions with biochar amendment. Qin et al [20] noted that CH 4 emission was negatively correlated with soil pH. Butnan et al [26] indicated that increased pH may suppress methanogenic activity and result in decreased CH 4 emissions; this finding was affirmed by the study conducted by Xu, et al [18], who discovered the significant negative correlation between soil pH and CH 4 production potential.…”

Section: Effect Of Biochar Amendment On Ch 4 Emissionsmentioning

confidence: 91%

“…Wang et al [19] noted that CH 4 emission decreased along with increasing soil oxidation-reduction potential (Eh). In a case study, Qin et al [20] discovered a significant negative relationship between CH 4 emission and soil dissolved organic carbon (DOC). Pratiwi and Shinogi [14] indicated that soil properties, such as increased saturated hydraulic conductivity and macroporosity, which cause CH 4 mitigation, improved with biochar application.…”

Section: Introductionmentioning

confidence: 99%

Effect of Biochar Amendment on Methane Emissions from Paddy Field under Water-Saving Irrigation

Xiao

Sung-Bum

et al. 2018

Sustainability

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Biochar has been proposed as a new countermeasure to mitigate climate change because of its potential in inhibiting greenhouse gas emissions from farmlands. A field experiment was conducted in Taihu Lake region in China to assess the effects of rice-straw biochar amendment on methane (CH 4) emissions from paddy fields under water-saving irrigation using three treatments, namely, control with no amendment (C0), 20 t ha −1 (C20), and 40 t ha −1 rice-straw biochar amendments (C40). Results showed that biochar application significantly decreased CH 4 emissions by 29.7% and 15.6% at C20 and C40 biochar addition level, respectively. C20 significantly increased soil dissolved organic carbon, total nitrogen, and NH 4 +-N by 79.5, 24.5, and 47.7%, respectively, and decreased NO 3 −-N by 30.4% compared with C0. On the other hand, no significant difference was observed in soil pH and soil organic carbon in all treatments. C20 and C40 significantly increased and decreased soil oxidation-reduction potential, respectively. Compared with C0, rice yield and irrigation water productivity significantly increased by 24.0% and 33.4% and 36.3% and 42.5% for C20 and C40, respectively. Thus, rice-straw biochar amendment and water-saving irrigation technology can inhibit CH 4 emissions while increasing rice yield and irrigation water productivity. The effects of increasing rice yield and irrigation water productivity were more remarkable for C40, but C20 was more effective in mitigating CH 4 emission.

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“…Their results indicate that biochar loading at 20 and 40 t ha −1 can reduce CH 2 and N 2 O emissions, increase rice yields, and improve irrigation water productivity under controlled irrigation. Qin et al (2016) reported the same results for 20-t-ha −1 biochar loading in rice fields, which resulted to maximum GHG-emission reduction of about 36.24% compared to a traditional field management method involving chemical fertilizer application. The reduction in GHG emissions was attributed to the increase in biodiversity and abundance of methanotrophic microbes, increased soil pH, increased soil aeration, and the recalcitrance of biochar.…”

Section: Biocharmentioning

confidence: 56%

Thermochemical Conversion of Rice Straw

Maguyon-Detras

Migo

Hùng

et al. 2019

Sustainable Rice Straw Management

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Biomass conversion into various forms of energy, such as heat, power, or biofuels using thermal processes, involves the decomposition of biomass by exposure to heat, typically above 300 °C. Thermal conversion processes include pyrolysis, gasification, and direct combustion. Several factors affect the yields and energy recovery from these processes including temperature, reaction time, heating rate, absence, or presence of oxygen, use of catalysts, and pressure. Due to rice straw's relatively high carbon and hydrogen contents, it contains a considerable amount of energy that make it a suitable feedstock for thermal conversion. In this chapter, the basic principles and factors affecting the thermal conversion of biomass into energy are discussed. Studies on the use of rice straw as feedstock to produce heat, power, and biofuels via thermal conversion are reviewed. Utilization of thermal conversion byproducts including biochar and ash will are presented. Thermal processes are compared in terms of energy conversion, possible environmental impacts, and technological and commercial maturity.

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Long-term effect of biochar application on yield-scaled greenhouse gas emissions in a rice paddy cropping system: A four-year case study in south China

Cited by 144 publications

References 68 publications

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

Effect of Biochar Amendment on Methane Emissions from Paddy Field under Water-Saving Irrigation

Thermochemical Conversion of Rice Straw

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