Soil carbon dioxide fluxes in established switchgrass land managed for biomass production

Lee, DoKyoung; Doolittle, James J.; Owens, Vance N.

doi:10.1016/j.soilbio.2006.07.004

Cited by 94 publications

(61 citation statements)

References 43 publications

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“…The impact of fertilization was also probably indirect since CO 2-soil in 2011 and CO 2-flux of both years were correlated with soil N contents (data not shown, P 00.001). Lee et al (2006) observed similar results with switchgrass under mineral fertilization, and an increase in CO 2-flux with manure application.…”

Section: Co 2 Fluxessupporting

confidence: 71%

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Carbon dynamics in a biochar-amended loamy soil under switchgrass

et al. 2015

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. 2015. Carbon dynamics in a biochar-amended loamy soil under switchgrass. Can. J. Soil Sci. 95: 1Á13. The environmental impacts of switchgrass production for bioenergy could be reduced through the use of biofertilizers rather than mineral fertilizers and through soil amendment with biochar. The objectives of this study were: (1) to assess the impact of biochar and biofertilizer on switchgrass (Panicum virgatum L.) yield and parameters related to carbon dynamics, (2) to correlate carbon parameters with soil physico-chemical properties over the first two growing seasons, and (3) to develop a C budget. A complete randomized block design was installed in a sandy loam with split plot treatment design, the main plots receiving 0 or 10 t ha(1 of biochar and the sub ( plots receiving no fertilization, mineral N fertilization, or biofertilizers. Biofertilizers had no significant impact on plant and soil. Biochar increased yield relative to the control treatment by about 10% during the first year and root biomass by up to 50% after 2 yr (P0.1). Mineral N fertilization also increased yield resulting in higher plant C sequestration after 2 yr. Biochar increased CO 2 soil concentration (CO 2-soil ) by up to 50% but its impact on CO 2 emission flux (CO 2-flux ) changed over time. The impact of mineral fertilization on CO 2-flux also varied with time. Soil CO 2 dynamics was mostly influenced by temperature, N and water content. Biochar and fertilization treatments showed interactions on some plant and soil parameters. The highest C sequestration budget was obtained with a combination of biochar and mineral N fertilization. The equivalent of about one-third of the increase in soil C content associated with biochar treatments was respired away by soil microorganisms. Nearly one-fourth of C sequestered by plants remained in or at the soil surface (root and crop residues).Key words: Panicum virgatum L., carbon sequestration, CO 2 emissions, soil carbon, soil gas concentration Allaire, S. E., Baril, B., Vanasse, A., Lange, S. F., MacKay, J. et Smith, D. L. 2015. Dynamique du carbone dans une production de panic e´rige´amende´e de biochar sur sol loameux. Can. J. Soil Sci. 95: 1Á13. Le biochar et les bioengrais pourraient aider ar e´duire les impacts environnementaux associe´s a`la production de panic e´rige´pour la bioe´nergie. Cette e´tude vise a`(1) quantifier l'impact du biochar et d'un bioengrais sur le rendement du panic e´rige´(Panicum virgatum L.), la se´questration de carbone, le CO 2 dans le sol (CO 2-soil ) et son e´mission (CO 2-flux ); (2) corre´ler les parame`tres de carbone avec les proprie´te´s du sol et (3) e´valuer le budget de carbone. Un plan expe´rimental en tiroirs a e´te´instaure´sur un loam. Les parcelles principales ont rec¸u 0 ou 10 t ha (1 de biochar, les parcelles secondaires ont rec¸u diffe´rents traitements d'engrais. Les bioengrais n'ont pas influence´les plantes et le sol. Le biochar a favorise´une augmentation de rendement de 10% a`la premie`re saison et la biomasse racinaire de 50% apre`s deux sais...

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Section: Co 2 Fluxessupporting

confidence: 71%

“…1 and 5). Frank et al (2004) and Lee et al (2006) also observed values of CO 2-flux that coincided with changes in soil temperature under switchgrass production with higher emissions during the warmest months. Further studies are needed to assess current outcome related to the relationship with N content.…”

Section: Co 2 Fluxesmentioning

confidence: 83%

Carbon dynamics in a biochar-amended loamy soil under switchgrass

et al. 2015

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“…Figure 3 shows the annual CO2 flux as a function of soil moisture. These results were inconsistent with some previous studies that demonstrated a more significant positive correlation between soil moisture and soil CO2 flux (Sainju et al 2010;Hernandez-Ramirez et al 2009;Lee et al 2007;Raich and Potter, 1995). Sainju et al (2010), for instance, showed that irrigation in some croplands increased CO2 flux rates by up to a 50% due to a correlated increase in soil moisture.…”

contrasting

confidence: 94%

“…Extensive research has demonstrated that soil respiration rates are positively correlated with temperature (Dornbush and Raich, 2006;Raich and Schlesinger, 1992;Wang et al, 2008;Chang et al 2012) and soil moisture (Bauer et al, 2008;Hernandez-Ramirez et al, 2009;Lee et al, 2007;Lloyd and Taylor, 1994;Raich and Potter, 1995;Sainju et al, 2010), both of which vary diurnally, seasonally, and episodically. Fine-resolution temporal data, i.e.…”

Section: Introductionmentioning

confidence: 99%

Soil Carbon Dioxide Respiration in Switch Grass Fields: Assessing Annual, Seasonal and Daily Flux Patterns

Lee¹,

McKnight²,

Skinner³

et al. 2017

JAES

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Quantifications of annual soil CO2 respiration in switch grass systems are limited to the growing season or coarse-scale temporal sampling. This study evaluates daily and seasonal soil CO2 respiration in switch grass croplands. Hourly measurements during 12 month period were taken for soil CO2 flux, soil temperature, and soil moisture. Although both soil temperature and moisture were positively correlated with soil CO2 flux rates, soil temperature was the primary driver of soil respiration. During winter, lower soil temperatures corresponded with significant decreases in average daily CO2 flux rates, however, CO2 pulses associated with precipitation events increased flux rates up to three times the seasonal daily average. Soil temperature influenced both daily and seasonal flux patterns where the highest flux rates, up to 31.0 kg CO2 ha-1 h-1, were observed during the warmest hours of the day (13:00 to 15:00) and during the warmest season (Summer). Summer and Spring emissions combined accounted for 80.1% of annual flux, indicating that exclusion of non-growing season time periods may result in an underestimation of total annual CO2 efflux. Our results indicate that inclusion of the non-growing season and a fine-resolution temporal sampling approach provides more accurate quantifications of total annual CO2 emissions in switch grass croplands.

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“…Lee et al (2007) reported that the average soil CO 2 flux during the growing periods of switchgrass were 472, 488, and 706 g CO 2 C m -2 for the control, NH 4 NO 3 -N, and manure-N plots, respectively. Alsafar and Al-Hassan (2009) applied 75 kg N ha -1 and significantly increased the total dry matter in mint (Menthe longifolia L.).…”

Section: Introductionmentioning

confidence: 99%

Organic and inorganic fertilizer effect on soil CO2 flux, microbial biomass, and growth of Nigella sativa L.

Salehi

Fallah

Sourki

2017

International Agrophysics

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A b s t r a c t. Cattle manure has a high carbon/nitrogen ratio and may not decompose; therefore, full-dose application of urea fertilizer might improve biological properties by increasing manure decomposition. This study aimed to investigate the effect of combining cattle manure and urea fertilizer on soil CO 2 flux, microbial biomass carbon, and dry matter accumulation during Nigella sativa L. (black cumin) growth under field conditions. The treatments were control, cattle manure, urea, different levels of split and full-dose integrated fertilizer. The results showed that integrated application of cattle manure and chemical fertilizer significantly increased microbial biomass carbon by 10%, soil organic carbon by 2.45%, total N by 3.27%, mineral N at the flowering stage by 7.57%, and CO 2 flux by 9% over solitary urea application. Integrated application increased microbial biomass carbon by 10% over the solitary application and the full-dose application by 5% over the split application. The soil properties and growth parameters of N. sativa L. benefited more from the fulldose application than the split application of urea. Cattle manure combined with chemical fertilizer and the full-dose application of urea increased fertilizer efficiency and improved biological soil parameters and plant growth. This method decreased the cost of top dressing urea fertilizer and proved beneficial for the environment and medicinal plant health.

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Soil carbon dioxide fluxes in established switchgrass land managed for biomass production

Cited by 94 publications

References 43 publications

Carbon dynamics in a biochar-amended loamy soil under switchgrass

Carbon dynamics in a biochar-amended loamy soil under switchgrass

Soil Carbon Dioxide Respiration in Switch Grass Fields: Assessing Annual, Seasonal and Daily Flux Patterns

Organic and inorganic fertilizer effect on soil CO2 flux, microbial biomass, and growth of Nigella sativa L.

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