Influence of crop growth and weather variables on soil CO2emissions in a maize-wheat cropping system

Dhadli, H. S.; Brar, B. S.; Black, T. Andrew

doi:10.5958/2395-146x.2015.00032.0

Agricul. Res. Jour.

2015

DOI: 10.5958/2395-146x.2015.00032.0

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Influence of crop growth and weather variables on soil CO₂emissions in a maize-wheat cropping system

H. S. Dhadli¹,

B. S. Brar²,

T. Andrew Black³

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Cited by 11 publications

(24 citation statements)

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“…Application of N alone had some effect on CO 2 fluxes just after the fertilizer application, but generally they declined gradually in season. Another interesting observation was that in control treatment, CO 2 fluxes increased during the middle of season, which coincided with vegetative and flowering stages (Sey et al 2010, Dhadli et al 2015. Soil CO 2 fluxes were found associated with soil temperature and soil water content (Adviento-Borbem et al 2010) and N-fertilization (Zhang et al 2013).…”

mentioning

confidence: 98%

“…Further, soil CO 2 emissions have found to be regulated by soil temperature and moisture (Peng et al 2011, Allaire et al 2012, Dhadli et al 2015. Soil moisture coupled with soil temperature and other soil-atmospheric interactions had been found to greatly affect soil CO 2 emissions, and an increase for shorter period after N application was also recorded (Dhadli et al 2015, Mbonimpa et al 2015. Relationship of CO 2 emission with soil C and N status.…”

mentioning

confidence: 99%

“…It was reported that specific root-derived respiration is higher during early vegetative growth and decline thereafter during reproductive and senescence stages (Fu et al 2002, Sey et al 2010, Jans et al 2010. Further, soil CO 2 emissions have found to be regulated by soil temperature and moisture (Peng et al 2011, Allaire et al 2012, Dhadli et al 2015. Soil moisture coupled with soil temperature and other soil-atmospheric interactions had been found to greatly affect soil CO 2 emissions, and an increase for shorter period after N application was also recorded (Dhadli et al 2015, Mbonimpa et al 2015.…”

mentioning

confidence: 99%

“…Further, cropping systems can influence CO 2 emission by affecting the quality and quantity of C returned to the soil as root biomass or as straw incorporation or mulching (Mapanda et al 2011, Gong et al 2012, Ding et al 2014). Additionally, due to variations in management practices in different cropping systems, soil temperature and water content which directly control CO 2 emission are also influenced (Peng et al 2011, Allaire et al 2012, Zhang et al 2013, Dhadli et al 2015.…”

mentioning

confidence: 99%

“…The depressions in CO 2 emissions in middle of wheat season coincided with drop in temperature, while towards the end of season soil moisture and temperature together controlled quantum of CO 2 emissions. Rise of flux in T 5 in the middle of season and then drop afterwards could have been the effect of higher root activity resulting in higher root exudation during vegetative and flowering growth stages (Dhadli et al 2015). It was reported that specific root-derived respiration is higher during early vegetative growth and decline thereafter during reproductive and senescence stages (Fu et al 2002, Sey et al 2010, Jans et al 2010.…”

mentioning

confidence: 99%

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Effect of long-term differential application of inorganic fertilizers and manure on soil CO2 emissions

Dhadli¹,

Brar²

2016

Plant Soil Environ.

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Carbon dioxide (CO 2 ) fluxes from agricultural soils have been considered as one of the important environmental impact issue, due to their role in global warming and also its mitigation by carbon (C) sequestration in soils. Substantial scope of C sequestration with the application of inorganic fertilizers and manures has been reported, but the long-term effects of continuous application need to be critically examined. To study the effect of continuous differential application of NPK fertilizers and farmyard manure (FYM) in maize-wheat cropping system, CO 2 fluxes were measured via closed chambers and gas chromatography in a long-term experiment in progress for the past 42 years. The average daily CO 2 fluxes differed significantly amongst various treatments and were 55, 26 and 92% higher in NPK, N and NPK + FYM treatments over the control in the maize crop season and 43, 8 and 83% in the wheat crop season. Highly significant correlation of CO 2 emissions was found with soil organic carbon and total nitrogen in the maize and the wheat crop seasons. Although, CO 2 emissions were higher from long-term inorganic fertilizers and FYM treatments, still they are environmentally sustainable management practices, as they increased soil fertility and crop yields which consequently resulted in higher atmospheric CO 2 capture by plants and carbon sequestration in soils.

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mentioning

confidence: 98%

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confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

mentioning

confidence: 99%

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Effect of long-term differential application of inorganic fertilizers and manure on soil CO2 emissions

Dhadli¹,

Brar²

2016

Plant Soil Environ.

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Soil carbon dioxide emissions in a sorghum field: Row position and growth stage effects

Kuang

Xiao

et al. 2021

Agrosystems Geosci & Env

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Soil carbon dioxide emission (SCE) is known to be impacted by multiple factors including sources of respiration, environmental factors, and crop and soil management practices, yet few reports exist on how crop row position and growth stage affect SCE in sorghum [Sorghum bicolor (L.) Moench] fields. The objective of this study was to examine the effects of row position and growth stage on SCE dynamics in a field under grain and sweet sorghum production in northern Alabama. Soil CO 2 emissions were measured weekly during the growth period using a closed soil CO 2 survey chamber system. The results showed that SCEs increased steadily from approximately 4 μmol CO 2 m-2 s-1 during the vegetative stage and reached maximum values of approximately about 5 μmol CO 2 m-2 s-1 and 6 μmol CO 2 m-2 s-1 for grain sorghum and sweet sorghum, respectively. Soil CO 2 emissions then decreased to approximately 2 μmol CO 2 m-2 s-1 at the maturity and post-maturity periods for both sorghum types. Significant differences in SCE were observed between row positions. Soil CO 2 emissions at the row (R) positions were 19% greater than at interrow (I) positions during the entire growing season under grain sorghum production. Significant difference occurred only during the vegetative stage (SCE at R was 9% greater than at I position) under sweet sorghum production. Additionally, a significantly greater response of SCE to soil temperature (Ts) during the vegetative stage was observed under sweet sorghum production but not grain sorghum production. This study provides evidence that SCE is affected by row position, growth stage, and crop type and suggests that crop row position and growth stage should be taken into consideration for SCE estimation.

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Soil trace gas fluxes in living mulch and conventional agricultural systems

et al. 2020

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Row crop agriculture is a significant source of two major greenhouse gases (GHGs) (carbon dioxide [CO2] and nitrous oxide [N2O]) and the air pollutant precursor ammonia (NH3). Fluxes of these naturally occurring trace gases are often augmented by agricultural practices, such as fertilizer application and crop systems management. A living mulch system (LMS) maintains a live cover crop year‐round and is an emerging agricultural system that can reduce pesticide and fertilizer use while maintaining yields. Multiple trace gas fluxes of GHGs and NH3 had not previously been measured together in an LMS of corn (Zea mays L.) and white clover (Trifolium repens L.). This study compared soil gas fluxes in a white clover LMS with two other cover crop systems and a no‐cover‐crop system. Infrared and gas chromatography measurements were taken over 2 yr in northern Georgia. Mean soil CO2 and N2O fluxes (159.7 kg ha−1 d−1 and 0.027 kg N ha−1 d−1, respectively) observed in LMS plots exceeded those from other treatments. Soil temperature, moisture, potentially mineralizable nitrogen (N), and nitrate partially explained these differences. Mean soil NH3 emissions were greater in LMS (0.089 kg N ha−1 d−1) compared with no cover crop (0.038 kg N ha−1 d−1). Increased N2O and NH3 fluxes could be from release of N from decomposition of clover and from release of N into the soil as the corn shades the clover. Although LMS plots did not reduce trace gas emissions, labile carbon content was at least 100 mg kg−1 greater than other treatments after 2 yr, improving soil health.

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Influence of crop growth and weather variables on soil CO₂emissions in a maize-wheat cropping system

Cited by 11 publications

References 0 publications

Effect of long-term differential application of inorganic fertilizers and manure on soil CO<sub>2</sub> emissions

Effect of long-term differential application of inorganic fertilizers and manure on soil CO<sub>2</sub> emissions

Soil carbon dioxide emissions in a sorghum field: Row position and growth stage effects

Soil trace gas fluxes in living mulch and conventional agricultural systems

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