Carbon budget of a rainfed spring maize cropland with straw returning on the Loess Plateau, China

Gao, Xiang; Gu, Fangyi; Hao, Weiping; Mei, Xurong; Li, Haoru; Gong, Daozhi; Mao, Lili; Zhang, Zuguang

doi:10.1016/j.scitotenv.2017.02.113

Cited by 45 publications

(38 citation statements)

References 45 publications

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“…response of terrestrial ecosystems to changing climatic and environmental conditions (Heimann and Reichstein, 2008). Nevertheless, the most recent efforts of evaluating the detailed CO2 budget components only appeared in limited studies for forests (Iglesias et al, 2013;Wu et al, 2013) and agro-ecosystems (Moureaux et al, 2008;Wang et al, 2015;Demyan et al, 2016;Gao et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Kutsch et al, 2010). Only a few studies reported the detailed CO2 budget components (Moureaux et al, 2008;Aubinet et al, 2009;Jans et al, 2010;Wang et al, 2015;Demyan et al, 2016;Gao et al, 2017), but the results remain diverse regarding whether agro-ecosystems are carbon sinks or sources. Therefore, the CO2 budget evaluation remains necessary to understand the contribution of agro-ecosystems to the global carbon balance (Smith et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Decadal variation of CO2 flux and its budget in a wheat and maize rotation cropland over the North China Plain

zhang¹,

Lei²,

Yang³

et al. 2020

Preprint

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Abstract. Carbon sequestration in agro-ecosystems has great potentials to mitigate global greenhouse gas emissions. To assess the CO2 sequestration and the decadal trend of an irrigated wheat-maize rotation cropland, the net ecosystem exchange (NEE) with the atmosphere was measured by using an eddy covariance system from 2005 through 2016 over the North China Plain. To evaluate the detailed CO2 budget components of this typical cropland, a comprehensive experiment was conducted in the full 2010&#8211;2011 wheat-maize rotation cycle by combining the eddy covariance NEE measurements, a soil respiration experiment that differentiated between heterotrophic and below-ground autotrophic respirations, plant carbon storage samplings and soil organic carbon measurements. Over the past decade from 2005 through 2016, the average of total NEE, Gross Primary Productivity (GPP), Ecosystem Respiration (ER) for wheat were &#8722;363.6 (&#177;&#8201;SD 97.8)&#8201;gC&#8201;m&#8722;2, 1173.9 (&#177;&#8201;189.1)&#8201;gC&#8201;m&#8722;2 and 810.0 (&#177;&#8201;161.0)&#8201;gC&#8201;m&#8722;2, and were &#8722;135.8 (&#177;&#8201;168.2)&#8201;gC&#8201;m&#8722;2, 1007.6 (&#177;&#8201;296.5)&#8201;gC&#8201;m&#8722;2, and 871.8 (&#177;&#8201;283.5)&#8201;gC&#8201;m&#8722;2 for maize. The multiple regression revealed that, air temperature was the dominant factor of CO2 fluxes for wheat; but in the maize season, incoming short-wave radiation and groundwater table were the dominant factors. For the full 2010&#8211;2011 cultural cycle, the CO2 fluxes for wheat and maize were as follows: NEE &#8722;437.9 and &#8722;238.8&#8201;gC&#8201;m&#8722;2, GPP 1078.2 and 779.7&#8201;gC&#8201;m&#8722;2, ER 640.4 and 540.8&#8201;gC&#8201;m&#8722;2, soil heterotrophic respiration 376.8 and 292.2&#8201;gC&#8201;m&#8722;2, below-ground autotrophic respiration 135.5 and 115.4&#8201;gC&#8201;m&#8722;2, above-ground autotrophic respiration 128.0 and 133.2&#8201;gC&#8201;m&#8722;2. The net biome productivity was 58.8 (&#177;&#8201;SD 45.8)&#8201;gC&#8201;m&#8722;2 for wheat and 3.9 (&#177;&#8201;42.9)&#8201;gC&#8201;m&#8722;2 for maize, indicating that wheat was a weak CO2 sink and maize was close to CO2 neutral to the atmosphere for this cultural cycle. However, when considering the total CO2 loss in the fallow period, the net biome productivity was &#8722;41.2 (&#177;&#8201;3.1)&#8201;gC&#8201;m&#8722;2&#8201;yr&#8722;1 for the full 2010&#8211;2011 cycle, implying that the cropland was a weak CO2 source in this period. The detailed investigation of the CO2 budget components of this study provides valuable knowledge for sustainable cropland management in the context of climate change.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decadal variation of CO2 flux and its budget in a wheat and maize rotation cropland over the North China Plain

zhang¹,

Lei²,

Yang³

et al. 2020

Preprint

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“…4. Discussions 4.1 Partitioning the NEP into the difference between GEP and RE NEP is the difference between GEP and RE, and the two processes with different physical and biological controls are linked over long timescales at the ecosystem level [9][10][11][12][13]. Partitioning of NEP into GEP and RE is needed for better understanding the causes of IAV of NEP [10].…”

Section: The Iav Of Nep and Its Climatic And Biotic Direct Controlsmentioning

confidence: 99%

“…GEP, as a direct indicator of carbon uptake during ecosystem photosynthesis, is controlled by canopy development, nutrient status, and light, temperature and water conditions [2,3,25,48]. RE, as a direct indicator of carbon loss during ecosystem respiration, is controlled by temperature, soil moisture, nutrient availability, stocks of living and dead biomass, and ecosystem productivity [11,26,49]. It is necessary to explore the causes of variation in GEP and RE rather than directly correlate NEP with meteorological or abiotic drivers [13,26,50].…”

Section: The Iav Of Nep and Its Climatic And Biotic Direct Controlsmentioning

confidence: 99%

“…For the IAV of cropland NEP in China, existing studies were mostly focus on winter wheat and summer maize double-cropped croplands in the North Plain, or spring maize in the Loess Plateau [11,[28][29][30]. In northeast China, the average growth rate of air temperature is 0.35℃/10a, and that of precipitation is −13.3 mm/10a, based on the 1961-2010 ground observations from 91 meteorological stations [31,32].…”

Section: Introductionmentioning

confidence: 99%

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Interannual variability of net ecosystem carbon production and its climatic and biotic mechanism during 2005-2018 in a rain-fed maize ecosystem

Zhang

Zhao

Lyu

et al. 2020

Preprint

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The interannual variation (IAV) of net ecosystem carbon production (NEP) plays an important role in understanding the mechanisms of the carbon cycle in the agriculture ecosystem. In this study, the IAV of NEP, which were expressed as annual values and anomalies, and its climatic and biotic controls mechanism, were investigated based on an eddy covariance dataset of rain-fed spring maize during 2005–2018 in the northeast of China. The annual NEP was 270±115 g C m −2 yr −1 . Annual values and anomalies of NEP were positively correlated with that of precipitation (PPT), gross ecosystem production (GEP) and daily maximum NEP (NEP max ). Annual anomalies of NEP were dominantly and positively controlled by the soil water content (SWC) through GEP and the soil temperature (Ts) through RE. In comparison, annual anomalies of NEP were dominantly and negatively controlled by summer VPD through the NEP max , positively adjusted by spring precipitation and the effective accumulative temperature through the beginning date (BDOY) of the affecting carbon uptake period (CUP), and by autumn precipitation and leaf area index through the end date (EDOY) of the affecting CUP. Residues restrained the carbon release at the beginning of the year, and accelerated the carbon release at the end of the year. Our results hightlight that NEP might be more sensitive to the change of water condition (such as PPT, SWC and VPD) induced by the climate changes.

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Carbon balance and controlling factors in a summer maize agroecosystem in the Guanzhong Plain, China

Peng¹,

Ma²,

Cai³

et al. 2022

J Sci Food Agric

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BACKGROUND Quantifying the carbon balance of agroecosystems and clarifying the factors controlling it are essential for estimating the regional carbon cycle and global carbon balance. RESULTS Based on the eddy covariance (EC) technique and soil respiration observations during the 2017 and 2019 summer maize growing seasons, this study analyzed the carbon balance and revealed the factors controlling carbon fluxes in the summer maize agroecosystem. Green leaf area index was the most important factor affecting net ecosystem exchange (NEE), total primary productivity, and total ecosystem respiration (TER) in the rapid development stage during the growing season, followed by soil water content. However, precipitation, air temperature, relative humidity, saturated vapor pressure difference, and photosynthetically active radiation were the main factors that influenced carbon balance at the middle stage. The cumulative TER in 2019 was 40% (320.9 g C m−2) higher than that in 2017. The NEE estimates of summer maize agroecosystems in 2017 and 2019 were −71.7 and 160.4 g C m−2, respectively. Accounting for the carbon input at sowing (10 g C m−2) and the similar carbon output at harvest owing to grain removal, the net biome productivity in 2019 was 1.75 times that in 2017, at −636 and −363 g C m−2, respectively. CONCLUSION The carbon balance of the summer maize agroecosystem in the Guanzhong Plain was determined to be a net carbon source that could export carbon at an average rate of 499.5 g C m−2 yr−1. © 2022 Society of Chemical Industry.

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Carbon budget of a rainfed spring maize cropland with straw returning on the Loess Plateau, China

Cited by 45 publications

References 45 publications

Decadal variation of CO<sub>2</sub> flux and its budget in a wheat and maize rotation cropland over the North China Plain

Decadal variation of CO<sub>2</sub> flux and its budget in a wheat and maize rotation cropland over the North China Plain

Interannual variability of net ecosystem carbon production and its climatic and biotic mechanism during 2005-2018 in a rain-fed maize ecosystem

Carbon balance and controlling factors in a summer maize agroecosystem in the Guanzhong Plain, China

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Carbon budget of a rainfed spring maize cropland with straw returning on the Loess Plateau, China

Cited by 45 publications

References 45 publications

Decadal variation of CO&lt;sub&gt;2&lt;/sub&gt; flux and its budget in a wheat and maize rotation cropland over the North China Plain

Decadal variation of CO&lt;sub&gt;2&lt;/sub&gt; flux and its budget in a wheat and maize rotation cropland over the North China Plain

Interannual variability of net ecosystem carbon production and its climatic and biotic mechanism during 2005-2018 in a rain-fed maize ecosystem

Carbon balance and controlling factors in a summer maize agroecosystem in the Guanzhong Plain, China

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Resources

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Decadal variation of CO<sub>2</sub> flux and its budget in a wheat and maize rotation cropland over the North China Plain

Decadal variation of CO<sub>2</sub> flux and its budget in a wheat and maize rotation cropland over the North China Plain