Effects of tillage practices and straw returning methods on greenhouse gas emissions and net ecosystem economic budget in rice–wheat cropping systems in central China

Zhang, Z.S.; Guo, Lijin; Liu, T.Q.; Li, C.F.; Cao, Cougui

doi:10.1016/j.atmosenv.2015.09.065

Cited by 131 publications

(49 citation statements)

References 46 publications

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“…On one hand, PT may decrease bulk density and increase gas-diffusion capacity, leading to a decrease in surface-water-retention capability. As a result, the soil anaerobic condition and topsoil denitrification potential decreased [56]. On the other hand, PT had lower bacterial biomass [57] and CO 2 emission than RT and NT [58].…”

Section: Effects Of Residue Returning Methods On N 2 O Emissionmentioning

confidence: 94%

The Responses of Soil N2O Emissions to Residue Returning Systems: A Meta-Analysis

Chen

Zhou

2019

Sustainability

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Background: Much attention has been focused on the influences of residue returning on N2O emissions. However, comprehensive quantification of the effect size on N2O emission following crop residue returning in subtropical, tropical and warm temperate conditions remains untested. Methods: To identify site-specific factors that influence N2O emission (kg N2O-N ha−1) in residue returning systems, we performed a meta-analysis involving 260 comparisons from 72 studies. Results: The data indicated that significant promoting effects were observed under residue returning by rotary tillage, no-tillage and mulch, whereas N2O release was significantly inhibited by 8% under residue returning by plough. For other contributors, the stimulatory and significant effects occurred in upland fields, under short- and medium-term residue returning durations, acidic/neutral soils, medium organic C and clay content. Nitrogen fertilizer application significantly stimulated N2O emission, even though application rate at 100–150 kg N ha−1 was inhibitory. Although a negative correlation between residue C/N ratio and N2O emission has been shown, residue returning could not reduce N2O emission with a higher C/N ratio and amount. Conclusions: Some options, such as converting residue returning methods, decreasing N fertilizer application rate, and regulating soil C/N ratio could be adopted to mitigate soil N2O emission following residue returning.

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Section: Effects Of Residue Returning Methods On N 2 O Emissionmentioning

confidence: 94%

The Responses of Soil N2O Emissions to Residue Returning Systems: A Meta-Analysis

Chen

Zhou

2019

Sustainability

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“…After the returning of oilseed rape straw, the decomposition of straw under an anaerobic environment caused the oxygen content to reduce rapidly [21,22], and the reductive substance content increased dramatically in soil [23][24][25][26], which deteriorated the root growing environment in rice fields. Results of this research showed that root length, root weight, and root bleeding reduced significantly in straw-returning treatment compared with no straw-returning treatment, either by mulching or by plowing, during the early stage of rice growth.…”

Section: Impacts Of Straw Returning On Root Growthmentioning

confidence: 99%

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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“…Moreover, NT may increase denitrifier activity in surface soil layers but has been shown to have the opposite effect below the 15 cm depth (Linn & Doran, ). It has also been found that NT may reduce soil temperatures (Ussiri & Lal, ), while improving soil structure (Dendooven et al, ; Villamil et al, ; Zhang, Guo, Liu, Li, & Cao, ). Across years in our study, NT had 7.5%–16.3% higher soil water content than CT during the peak N 2 O emission periods.…”

Section: Discussionmentioning

confidence: 99%

Soil N₂O emissions as affected by long‐term residue removal and no‐till practices in continuous corn

et al. 2018

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The environmental consequences of residue removal practices to support cellulosic biofuel production remain poorly understood. In the U.S. Midwest, corn (Zea mays L.) stover removal combined with no‐till practices may increase or decrease soil N2O emissions by influencing soil moisture, temperature, and nutrient dynamics, yet empirical evidence from long‐term field experiments is inconsistent. We investigated the effects of residue management (residue retained or removed) and tillage (chisel‐till or no‐till) on cumulative soil nitrous oxide (N2O) emissions, grain yield, and yield‐scaled N2O emissions in a 3‐year study initiated 10 years after treatment implementation in a long‐term, continuous corn experiment in Illinois, United States. Crop yields were affected by treatment in only one of three study years, with the combination of residue removal and no‐till reducing yields compared to both chisel‐till treatments. Cumulative N2O emissions, soil inorganic N concentrations, and yield‐scaled N2O emissions differed over the 3‐year period and were significantly affected by tillage, with no response to residue management. In 2 years, no‐till decreased cumulative N2O emissions and yield‐scaled N2O emissions by an average of 64% and 60%, respectively. Correlations between daily N2O fluxes and soil moisture, temperature, and inorganic N concentrations suggested that the relative importance of these variables changed depending on year and treatment. While more research across a range of sites and management practices is needed, our findings support previous studies which have challenged IPCC methodology assumptions regarding the effects of residue removal on N2O emissions. We conclude there is inherent difficulty in predicting the impacts of residue removal due to the complexity of soil processes underlying N2O emissions coupled with inter‐annual weather variability in this rainfed continuous corn system. Future efforts to evaluate the net greenhouse gas emissions of cellulosic biofuel production may benefit from accounting for this uncertainty.

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Effects of tillage practices and straw returning methods on greenhouse gas emissions and net ecosystem economic budget in rice–wheat cropping systems in central China

Cited by 131 publications

References 46 publications

The Responses of Soil N2O Emissions to Residue Returning Systems: A Meta-Analysis

The Responses of Soil N2O Emissions to Residue Returning Systems: A Meta-Analysis

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

Soil N₂O emissions as affected by long‐term residue removal and no‐till practices in continuous corn

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Effects of tillage practices and straw returning methods on greenhouse gas emissions and net ecosystem economic budget in rice–wheat cropping systems in central China

Cited by 131 publications

References 46 publications

The Responses of Soil N2O Emissions to Residue Returning Systems: A Meta-Analysis

The Responses of Soil N2O Emissions to Residue Returning Systems: A Meta-Analysis

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

Soil N2O emissions as affected by long‐term residue removal and no‐till practices in continuous corn

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Soil N₂O emissions as affected by long‐term residue removal and no‐till practices in continuous corn