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Chen, X.; Cabrera, M. L.; Zhang, Linhai; Wu, Jinshui; Yu, Wen; Shen, Sida

doi:10.1023/a:1021202114354

Cited by 30 publications

(5 citation statements)

References 21 publications

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“…As plants release labile organic compounds in soil, this is expected to increase both nitrate and ammonium in the soil, increasing N2O production (Del Grosso et al, 2000). Moreover, plants contribute to NEE-N2O as they can be a conduit in which N2O can be dissolved and released from the soil, where it is formulated, into the atmosphere (Chen et al, 2002, Zou et al, 2005. In addition to supporting soil production of N2O, plants can produce N2O as part of nitrite (NO2-) photo assimilation which can account for 5-6% of NEE-N2O (Smart and Bloom, 2001, Hakata et al, 2003, Pihlatie et al, 2005.…”

Section: Nitrous Oxide (N2o)mentioning

confidence: 99%

“…Plants also impact N2O emissions through several mechanisms (Del Grosso et al, 2000, Pihlatie et al, 2005. Plants release N2O through their tissues (Chang et al, 1998, Rusch and Rennenberg, 1998, Yan et al, 2000, Smart and Bloom, 2001, Chen et al, 2002, Hakata et al, 2003, Müller, 2003. For example, Chen et al, (2002) and Zou et al, (2005) found that, for a wheat crop, the plant contribution to N2O emissions ranged between 11% and 63%.…”

Section: Introductionmentioning

confidence: 99%

“…Plants release N2O through their tissues (Chang et al, 1998, Rusch and Rennenberg, 1998, Yan et al, 2000, Smart and Bloom, 2001, Chen et al, 2002, Hakata et al, 2003, Müller, 2003. For example, Chen et al, (2002) and Zou et al, (2005) found that, for a wheat crop, the plant contribution to N2O emissions ranged between 11% and 63%. Furthermore, wheat also host enzymes that form N2O inside its leaf tissue contributing to net emissions of N2O (Smart andBloom, 2001, Hakata et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Short-term impacts of different tillage practices and plant residue retention on soil physical properties and greenhouse gas emissions

Alskaf

Mooney

Sparkes

et al. 2021

Soil and Tillage Research

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Section: Nitrous Oxide (N2o)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Short-term impacts of different tillage practices and plant residue retention on soil physical properties and greenhouse gas emissions

Alskaf

Mooney

Sparkes

et al. 2021

Soil and Tillage Research

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“…The cultivation of maize with its high N requirements (50-374 kg N ha −1 ) favors microbial activities to produce N 2 O. To date, limited studies have focused on N 2 O emissions from these rainfed agricultural soils and have reported a wide range of annual N 2 O emissions (range from 0.3 to 2.5 kg N ha −1 yr −1 , Chen et al, 2002Chen et al, , 2014Chen et al, , 2016Ni et al, 2012;Dong et al, 2018). We observed that all these studies were based on low-frequency manual techniques which may contribute to the large range of annual N 2 O emissions.…”

Section: Introductionmentioning

confidence: 99%

Temporal Patterns of N2O Fluxes From a Rainfed Maize Field in Northeast China

Kang

Huang

et al. 2021

Front. Environ. Sci.

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Rainfed agriculture is one of the most common farming practices in the world and is vulnerable to global climate change. However, only limited studies have been conducted on rainfed agriculture, mainly using low-frequency manual techniques, which caused large uncertainties in estimating annual N2O emissions. In this study, we used a fully automated system to continuously measure soil N2O emissions for two years (April 2017 to March 2019) in a typical rainfed maize field in Northeast China. The annual N2O emissions were 2.8 kg N ha−1 in year 1 (April 2017 to March 2018) and 1.8 kg N ha−1 in year 2 (April 2018 to March 2019), accounting for 1.9 and 1.2% of the nitrogen fertilizer applied, respectively. The inter-annual variability was mainly due to different weather conditions encountered in years 1 and 2. A severe drought in year 1 reduced plant N uptake, leaving high mineral N in the soil, and the following moderate rainfalls promoted a large amount of N2O emissions. The seasonal pattern of N2O fluxes was mainly controlled by soil temperature and soil nitrate concentration. Both soil moisture and the molar ratio of NO/N2O indicate that N2O and NO were mainly derived from nitrification, resulting in a significant positive correlation between N2O and NO flux in the intra-rows (where nitrogen fertilizer was applied). Moreover, we observed that the N2O emissions during the freeze–thaw periods were negligible in this region for rainfed agriculture. Our long-term and high-resolution measurements of soil N2O emissions suggest that sampling between LST 9:00 and 10:00 is the best empirical sampling time for the intermittent manual measurements.

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“…Here, trace GHG emissions may originate from root uptake of dissolved gases produced in the soil, and then conveyed to the atmosphere via aerenchyma tissue (Cicerone & Shetter, 1981;Butterbach-Bahl et al, 1997) or transpiration stream (Chang et al, 1998). Earlier studies investigating the role of plants as conduits for soilproduced trace gases focused on herbaceous species, where the contribution of plant-mediated trace gas emissions were reported to make up to 90% of the total (plant + soil) emission (Singh & Singh, 1995;Butterbach-Bahl et al, 1997;Yu et al, 1997;Chen et al, 2002).…”

Section: Trees As Conduits Of N2o and Ch4 Fluxesmentioning

confidence: 99%

Trace gas fluxes from soils and tree stems of rainforests and cacao agroforests in the Congo Basin, Cameroon

Iddris¹

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Tropical rainforests play a crucial role in biogeochemical cycles and global climate dynamics.Yet, research efforts to quantify the main sources and sinks of trace greenhouse gases lags behind that of other biomes. The African continent is among the least researched regions worldwide, and the effects of land-use change on trace greenhouse gases are identified as an important research gap in the greenhouse gas budget of Africa. Recent studies in wetland and temperate forests have provided evidence for tree stem nitrous oxide (N2O) and methane (CH4) emissions, but the magnitudes of tree contributions to total (soil + stem) N2O and CH4 emissions from tropical rainforests on heavily weathered soils remain unknown. Given these knowledge gaps, this thesis consists of two studies aimed at quantifying the changes in stem and soil N2O and CH4 fluxes, and soil carbon dioxide (CO2) fluxes with forest conversion to cacao agroforestry. The study was conducted at three sites (villages) in central and southern Cameroon, all located on heavily weathered soils. To assess the impact of land-use change on stem and soil greenhouse gas fluxes, we studied two land-use systems at each site: the reference forest and the converted cacao agroforestry system. At each site, we selected four replicate plots (2500 m 2 each) for each land use. Soil and stem greenhouse gas fluxes were measured monthly using vented static chambers (4 chambers per plot) and stem chambers (6 trees per plot), respectively, from April 2017 to April 2018. On each measurement period, we also measured known soil and climatic controlling factors. CHAPTER 1 GENERAL INTRODUCTIONChapter 1 estimated to be ca. 400,000 hectares, are hand planted under the shade of forests' remnant trees with no fertilizer inputs , making these cacao agroforests one of the most sustainable land-use systems in Central and West Africa forest zones. Aims and hypothesesDespite disparity of estimates for African trace gas budget between bottom-up and top-down approaches, no study has concurrently quantified soil and stem trace gas emissions from Africa.The research presented in this thesis aimed to provide a systematic comparison between a reference land use and a converted system for quantifying land-use change effects on stem and soil trace gas fluxes, which are virtually lacking for the Congo Basin, and thus an important

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Untitled

Cited by 30 publications

References 21 publications

Short-term impacts of different tillage practices and plant residue retention on soil physical properties and greenhouse gas emissions

Short-term impacts of different tillage practices and plant residue retention on soil physical properties and greenhouse gas emissions

Temporal Patterns of N2O Fluxes From a Rainfed Maize Field in Northeast China

Trace gas fluxes from soils and tree stems of rainforests and cacao agroforests in the Congo Basin, Cameroon

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