Integrated assessment of carbon footprint and economic profit from paddy fields under microbial decaying agents with diverse water regimes in central China

Du, Xuezhu; Hao, Mian; Guo, Lijin; Li, Shihao; Hu, Wan-ling; Feng, Sheng; Li, Chengfang

doi:10.1016/j.agwat.2021.107403

Cited by 10 publications

(6 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous studies have shown that methane is a major contributor to CF, which is consistent with the results of this study [62]. The reduction of methane emission from paddy fields under AIM treatment in this study is mainly attributed to the fact that AIM creates an aerobic environment on the surface of the soil as little water layer is built up.…”

Section: Effects Of Different Water and Fertilizer Management On The ...supporting

confidence: 92%

See 1 more Smart Citation

Can the Integration of Water and Fertilizer Promote the Sustainable Development of Rice Production in China?

Liao,

Nie,

Yin

et al. 2024

Agriculture

View full text Add to dashboard Cite

Rice production is the agricultural activity with the highest energy consumption and carbon emission intensity. Water and fertilizer management constitutes an important part of energy input for rice production and a key factor affecting greenhouse gas emissions from paddy fields. Water–fertilizer integration management (AIM) is an automated water and fertilizer management system for large-scale rice production, which can effectively save water and fertilizer resources. At present, the energy utilization and environmental impact of AIM in rice production are not clear. To clarify whether AIM is a water and fertilizer management measure that combines energy conservation and carbon emission reduction, a comparative study between the widely used farmers’ enhanced water and fertilizer management (FEM) in China and AIM was conducted in this paper. Field experiments were conducted to evaluate the rice yield, carbon emission, energy utilization, and economic benefits of the two management methods. The results showed that AIM reduced water and fertilizer inputs, energy inputs, and economic costs by 12.18–28.57%, compared to FEM. The energy utilization efficiency, energy profitability, and energy productivity under AIM were improved by 11.30–12.61%. CH4 and N2O emissions and carbon footprint were reduced by 20.79%, 6.51%, and 16.39%, respectively. Compared with FEM, AIM can effectively improve the utilization efficiency of water and fertilizer resources and reduce carbon emissions. This study presents a mechanized water and fertilizer management approach suitable for large-scale rice production systems in China. By analyzing rice yield, resource utilization efficiency, and environmental benefits, AIM can serve as a crucial management strategy for enhancing productivity, economic returns, and environmental conservation within profitable rice production systems. In the future, further investigation into the impact of AIM on the microbial mechanisms underlying rice yield formation and greenhouse gas emissions is warranted.

show abstract

Section: Effects Of Different Water and Fertilizer Management On The ...supporting

confidence: 92%

“…The CF of rice production in this study was lower than the 2.35 to 2.42 kg CO 2 -eq kg −1 of continuous flood irrigation in central China reported by Du et al [62]. Due to favorable climatic conditions, double-cropped rice is one of the main types of production in central China.…”

Section: Effects Of Different Water and Fertilizer Management On The ...contrasting

confidence: 76%

Can the Integration of Water and Fertilizer Promote the Sustainable Development of Rice Production in China?

Liao,

Nie,

Yin

et al. 2024

Agriculture

View full text Add to dashboard Cite

show abstract

“…The present study systematically and quantitatively explored the Regarding the selection of crop residues, the present study suggested that rice residue exhibited lower total C emissions and higher relative net C balance. Although most of the relevant data collected here is under saturated water conditions, it may better serve as a guide for practice because rice residue returning to the croplands under water saturation conditions is a common and convenient management (Du et al, 2022). Furthermore, the unbalanced data distribution on water conditions also highlights the limitations of current studies on ER and PE induced by rice returning under low soil moisture conditions, providing valuable insights for future research.…”

Section: Implications and Future Researchmentioning

confidence: 99%

Carbon emissions and priming effects derived from crop residues and their responses to nitrogen inputs

Qin,

Chen,

Scriber

et al. 2024

Global Change Biology

View full text Add to dashboard Cite

Crop residue‐derived carbon (C) emissions and priming effects (PE) in cropland soils can influence the global C cycle. However, their corresponding generality, driving factors, and responses to nitrogen (N) inputs are poorly understood. As a result, the total C emissions and net C balance also remain mysterious. To address the above knowledge gaps, a meta‐analysis of 1123 observations, taken from 51 studies world‐wide, has been completed. The results showed that within 360 days, emission ratios of crop residues C (ER) ranged from 0.22% to 61.80%, and crop residues generally induced positive PE (+71.76%). Comparatively, the contribution of crop residue‐derived C emissions (52.82%) to total C emissions was generally higher than that of PE (12.08%), emphasizing the importance of reducing ER. The ER and PE differed among crop types, and both were low in the case of rice, which was attributed to its saturated water conditions. The ER and PE also varied with soil properties, as PE decreased with increasing C addition ratio in soils where soil organic carbon (SOC) was less than 10‰; in contrast, the opposite phenomenon was observed in soils with SOC exceeding 10‰. Moreover, N inputs increased ER and PE by 8.31% and 3.78%, respectively, which was predominantly attributed to (NH4)2SO4. The increased PE was verified to be dominated by microbial stoichiometric decomposition. In summary, after incorporating crop residues, the total C emissions and relative net C balance in the cropland soils ranged from 0.03 to 23.47 mg C g−1 soil and 0.21 to 0.97 mg C g−1 residue‐C g−1 soil, respectively, suggesting a significant impact on C cycle. These results clarify the value of incorporating crop residues into croplands to regulate global SOC dynamics and help to establish while managing site‐specific crop return systems that facilitate C sequestration.

show abstract

“…Intermittent irrigation has been shown to be an effective measure to reduce emissions by alternating anaerobic and aerobic environments in paddy fields changing the redox potential of the soil to reduce GHG emissions (Xu et al, 2015). The most striking difference is that alternate wetting and drying irrigation reduced the CF, while continuous flooding irrigation CF showed an increase of 1.86 times (Du et al, 2022). Compared to conventional flooding paddies, maintaining a saturated soil water content and maintaining 80% of the field capacity significantly reduced the CF by 30.7 and 34.7%, respectively (Xu et al, 2020).…”

Section: Irrigationmentioning

confidence: 99%

Carbon footprint research and mitigation strategies for rice-cropping systems in China: a review

Ji,

Zhou,

et al. 2024

Front. Sustain. Food Syst.

View full text Add to dashboard Cite

Reducing greenhouse gas (GHG) emissions and quantifying the carbon footprint (CF) of rice-cropping systems in the context of food security is an important step toward the sustainability of rice production. Exploring the key factors affecting emission reduction in rice production is important to properly evaluate the impact of China’s rice-cropping systems on global climate change. This review provides an overview of the direct and indirect CF in rice-cropping systems; analyzes the influencing factors in terms of rice-based cropping systems, varieties and agronomic practices; and proposes mitigation strategies. Different studies have shown that direct and indirect GHG emissions in rice-based cropping systems accounted for 38.3 to 95.5% and 4.5 to 61.7% of total emissions, respectively. And the CFs of ratoon rice, rice–wheat, rice–maize, rice–rapeseed, and rice–fish systems ranged from 316,9 kg CO2-eq kg−1 to 258,47 kg CO2-eq kg−1, which are lower than that in a double-rice planting system. High-yielding rice, drought-resistant rice, and other hybrids can mitigate GHG emissions from paddy fields by 3.7 ~ 21.5%. Furthermore, organic matter, water, tillage, straw incorporation, conservation tillage, reduced nitrogen fertilizer use, and added biochar and methane inhibitors could reduce emissions. Therefore, through reasonable agronomic measures, variety selection and optimal layout of rice-based rotation systems, the carbon neutral rate of rice production can be improved to help the national carbon sequestration and emission reduction target.

show abstract

Integrated assessment of carbon footprint and economic profit from paddy fields under microbial decaying agents with diverse water regimes in central China

Cited by 10 publications

References 48 publications

Can the Integration of Water and Fertilizer Promote the Sustainable Development of Rice Production in China?

Can the Integration of Water and Fertilizer Promote the Sustainable Development of Rice Production in China?

Carbon emissions and priming effects derived from crop residues and their responses to nitrogen inputs

Carbon footprint research and mitigation strategies for rice-cropping systems in China: a review

Contact Info

Product

Resources

About