Crop straw incorporation alleviates overall fertilizer-N losses and mitigates N2O emissions per unit applied N from intensively farmed soils: An in situ 15N tracing study

Xu, Cong; Han, Xiao; Zhuge, Yuping; Xiao, Guangmin; Ni, Bang; Xu, Xiuchun; Meng, Fanqiao

doi:10.1016/j.scitotenv.2020.142884

Cited by 44 publications

(21 citation statements)

References 103 publications

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“…It is also well documented that straw incorporation positively affected the activities of various beneficial microbes to facilitate in protecting the soil environment for sustainable agricultural production ( Garg and Bahl, 2008 ). However, results of previously published reports on the efficacy of straw incorporation treatments for crop yield and environment were inconsistent, showing either positive ( Huang et al, 2017 ), negative ( Yao et al, 2017 ; Xu et al, 2021 ), or neutral effects ( Zhang et al, 2017 ). Fertilization had a significant effect on soil health and productivity, and soil GHGs emissions ( Liu et al, 2017 ).…”

Section: Introductionmentioning

confidence: 88%

Effects of Nitrogen Application Rate Under Straw Incorporation on Photosynthesis, Productivity and Nitrogen Use Efficiency in Winter Wheat

et al. 2022

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Developing a nitrogen fertilizer (N) reduction method under straw incorporation is essentially important for increasing wheat productivity in terms of improved fertilizer use efficiency and high yield in semiarid areas. A two-year field experiment, with five different nitrogen application rates: control (without N application, N0), low N (75 kg ha–1, N75), medium N (150 kg ha–1, N150), high N (225 kg ha–1, N225) and excessive N (300 kg ha–1, N300), was conducted in 2018 and 2019 to quantify their impacts on the photosynthetic characteristics, nitrogen utilization (in terms of N accumulation, distribution and transportation, and residual soil NO3–-N) and productivity of winter wheat. There was a significant impact of N rates on photosynthetic traits, and N accumulation in different organs. As compared with the N300, N150, and N225 improved the photosynthetic characteristics, increased N accumulation in grains by 5.55 and 10.97%, the N contribution proportion of that accumulated after anthesis by 67.90 and 115.56%, and reduced residual N by 62.50 and 46.48%, respectively, thereby effectively improved N absorption efficiency and N contribution rates. Grain yield remained slightly or unchanged among N treatments. Although N0 and N75 treatments reduced the nitrate-N leaching but caused a significant reduction of 18.13 and 28.37%, respectively, in grain yield. From these results, we conclude that N application at 150 and 225 kg⋅ha–1 under straw incorporation was the most effective fertilization method in achieving the higher photosynthetic characteristics, improving NUE and grain yield. This study provides theoretical and practical guidance for wheat production techniques.

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Section: Introductionmentioning

confidence: 88%

Effects of Nitrogen Application Rate Under Straw Incorporation on Photosynthesis, Productivity and Nitrogen Use Efficiency in Winter Wheat

et al. 2022

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“…At the Burdekin site, soil-derived N 2 O emissions also increased with increasing N rates. This increase in the soil-derived N 2 O has been attributed to priming of organic N mineralisation by added N (Schleusner et al 2018;Xu et al 2021), evidenced by increased CO 2 emissions in response to added N (De Rosa et al 2018). In our study, cumulative CO 2 emissions did not respond to N fertiliser application at both sites (Fig.…”

Section: Discussionmentioning

confidence: 99%

Interaction Between Soil and Fertiliser Nitrogen (N) Drives Plant N Uptake and Nitrous Oxide (N2O) Emissions in Tropical Sugarcane Systems

Takeda

Friedl

Kirkby

et al. 2022

Preprint

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Aims: High nitrogen (N) fertiliser inputs in intensive sugarcane systems drive productivity but also significant emissions of nitrous oxide (N2O), a potent greenhouse gas. The effects of N fertiliser inputs on native soil N availability for plant N uptake as well as N2O emissions remain unknown, hindering efficient N management. This study investigated the contribution of fertiliser and soil N and their interaction to plant N uptake and N2O emissions in two intensively managed tropical sugarcane systems with different farming practices. Methods: High temporal resolution N2O measurements were combined with 15N recoveries across four N fertiliser rates, (100, 150, 200 and 250 kg N ha-1) in soil, plant and N2O emissions. Results: Cumulative N2O emissions ranged from 0.3 to 4.1 kg N ha-1, corresponding to emission factors ranging from 0.7 to 2.4%. Native soil N accounted for > 60% of cumulative N2O emissions and total plant N uptake. Fertiliser N addition increased N2O emissions from native soil N compared to the unfertilised control. These findings highlight the interaction between fertiliser and soil N, with the latter being the dominant source for N uptake and loss. Overall fertiliser 15N loss responded exponentially to N rates with 50% of applied N fertiliser permanently lost even at the recommended N rate. Conclusions: The response of soil-derived N2O emissions to N rates largely determined the magnitude of total N2O emissions, demonstrating the importance of site and soil specific interaction between soil and fertiliser N for N2O emissions.

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“…SI slightly increased N 2 O emission from black soil, while it strongly increased N 2 O emission from red soil (Figure 2). The combined application of SI and fertilizer increases the emission of N 2 O in the soil (Liu et al, 2021; Xu et al, 2021). This is because SI can affect the N status and N cycling rate in the farmland soil, thus affecting the release of soil N 2 O.…”

Section: Discussionmentioning

confidence: 99%

Effect of straw incorporation and nitrification inhibitor on nitrous oxide emission in three cropland soils

Zhang

Liu

Wang

et al. 2022

J of Sust Agri & Env

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Introduction Nitrification inhibitors and straw incorporation are used to reduce microbial mediated nitrogen (N) losses, thereby increasing N use efficiency (NUE) in cropland soil, but their effects on nitrous oxide (N2O) emission across different soil types and the underlying molecular mechanisms remain less understood. Materials and Methods In this study, we investigated how nitrification inhibitor nitrapyrin and straw incorporation affected soil N balance, N2O emission, nitrifiers and denitrifiers in three cropland soils (black, fluvo‐aquic and red soils). Results Compared with fertilization‐only treatment (N), nitrapyrin addition increased ammonium, while it decreased nitrate concentration in all soils; however, the performance of straw incorporation was less significant. Nitrapyrin decreased N2O emission only in the fluvo‐aquic soil, while straw incorporation strongly increased N2O emission in the red soil. Terminal restriction fragment length polymorphism analysis revealed that the denitrifier community was distinct across the three soils, but not strongly structured by nitrapyrin or straw incorporation. Compared with the N treatment, straw incorporation and nitrapyrin increased nosZ gene abundance only in the black soil. Structural equational modelling further confirmed that, after accounting for different soil properties, straw incorporation significantly increased N2O emission from black and red soils, and a decrease in nosZ gene abundance was the main biological factor for increased N2O emission in red soil. Conclusion Taken together, our work provides new knowledge that the performance of nitrification inhibitor and straw incorporation on N2O emission is soil type‐dependent, and management practices should be used as per soil type to balance NUE and N2O emission.

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Crop straw incorporation alleviates overall fertilizer-N losses and mitigates N2O emissions per unit applied N from intensively farmed soils: An in situ 15N tracing study

Cited by 44 publications

References 103 publications

Effects of Nitrogen Application Rate Under Straw Incorporation on Photosynthesis, Productivity and Nitrogen Use Efficiency in Winter Wheat

Effects of Nitrogen Application Rate Under Straw Incorporation on Photosynthesis, Productivity and Nitrogen Use Efficiency in Winter Wheat

Interaction Between Soil and Fertiliser Nitrogen (N) Drives Plant N Uptake and Nitrous Oxide (N2O) Emissions in Tropical Sugarcane Systems

Effect of straw incorporation and nitrification inhibitor on nitrous oxide emission in three cropland soils

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