Impact of tillage management on the short- and long-term soil carbon dioxide emissions in the dryland of Loess Plateau in China

Dong, Wenyi; Liu, Enke; Wang, Jianbo; Yan, Changrong; Li, Juan; Zhang, Yanqing

doi:10.1016/j.geoderma.2017.07.036

Cited by 32 publications

(16 citation statements)

References 43 publications

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“…Positive correlations were observed between soil CO 2 fluxes and soil temperature but the correlations were not significant ( P > 0.05) (Table ). Inconsistent previous results showed that soil temperature was the main factor influencing soil CO 2 emissions, and significant correlations were found between soil CO 2 fluxes and soil temperature ( P > 0.05). For example, soil respiration increased exponentially with soil temperature at the depth of 0–5 cm in the field experiment during the wheat‐ and maize‐growing seasons .…”

Section: Discussionsupporting

confidence: 52%

“…Significant relationships were also found between soil CO 2 fluxes and WFPS ( P < 0.01) (Table ). Previous research showed that soil respiration was positively correlated with soil moisture but the correlations were not significant . For instance, CO 2 emissions from the dry land soil showed no significant correlations with soil moisture content under the straw mulching ( P > 0.05) .…”

Section: Discussionmentioning

confidence: 78%

“…Previous research showed that soil respiration was positively correlated with soil moisture but the correlations were not significant . For instance, CO 2 emissions from the dry land soil showed no significant correlations with soil moisture content under the straw mulching ( P > 0.05) . The possible reason for the difference might be the straw management as straw mulching could reduce soil evaporation, thus affecting the impact of soil moisture content on soil CO 2 emissions through its influences on root respiration and gas diffusion …”

Section: Discussionmentioning

confidence: 92%

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Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China

et al. 2019

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BACKGROUND: An irrigation regime is an important factor in regulating soil CO 2 emissions from wheat fields. Deficit irrigation can be applied easily in the fields and has been implemented in northwest China. Previous studies have mainly focused on the effects of deficit irrigation on crop yield and quality. Studies on its environmental impacts are sparse. RESULTS: Soil CO 2 fluxes from deficit-irrigated fields were lower than those from full irrigation (CK) during most of the growing season. Cumulative soil CO 2 emissions from deficit-irrigated fields were reduced by 10.2-25.5%, compared with the CK. Peaks of soil CO 2 fluxes were observed 3-7 days after irrigation in the water-filled pore space (WFPS) range of 65.7-80.4%. Under different irrigation regimes, significant positive correlations were observed between soil CO 2 fluxes and WFPS (P < 0.01), but no significant correlations were found between soil CO 2 fluxes and soil temperature. Compared to CK, yields for the T1, T2, and T4 were significantly reduced (P < 0.05) but the yield for T3 was only reduced by 2.3% (P > 0.05); T3 significantly reduced soil CO 2 emissions by 10.2% (P < 0.05) and reduced the irrigation water amount by 5.7%. CONCLUSION: Deficit irrigation effectively reduced CO 2 emissions from winter wheat field soils. T3 may be a water-saving, CO 2 emission-reducing and high-yield irrigation regime for winter wheat fields in northwest China. The research laid a preliminary theoretical foundation for formulating winter wheat irrigation systems that are water saving, emission reducing, and that produce high yields.

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 92%

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Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China

et al. 2019

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“…The higher soil CO 2 fluxes (172 mg m −2 hr −1 ; Figure b) found post‐subsoiling in H + F harvested areas are similar to the lower limits found in the literature for coffee and sugarcane in Brazil, which range from approximately 200 to 3,000 mg m −2 hr −1 (D'Andréa et al, ; La Scala et al, ; Moitinho et al, ). These fluxes are also similar to those for wheat cultivation in Hungary and China (Dong et al, ; Rádics et al, ) and for rubber trees in Indonesia, which range from approximately 100 to 1,400 mg m −2 hr −1 (Wakhid, Hirano, Okimoto, Nurzakiah, & Nursyamsi, ). Eucalyptus plantations in Brazil have an average cycle of harvest and tillage that occurs every 7 years and is different from annual crops.…”

Section: Discussionsupporting

confidence: 77%

Short‐term carbon emissions: Effect of various tree harvesting, transport, and tillage methods under a eucalyptus plantation

Fialho

Teixeira

et al. 2018

Land Degrad Dev

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Eucalyptus forests stand out for their potential to sequestrate atmospheric CO 2 in soil organic matter throughout their growth. Our study evaluated the harvesting and tillage effect in eucalyptus plantations to the soil CO 2 , 13 C-CO 2 , and CH 4 fluxes. This study was carried out in a eucalyptus plantation, on Typic Haplustox soil. The study used stands cultivated with eucalyptus at the end of the first rotation (7 years), established over degraded pastures. The effect of harvesting was assessed through comparisons of samples taken before and after harvesting with Feller + Skidder (F + S) and Harvester + Forwarder (H + F) methods and separate samples of plant rows (R) and plant interrows (IR). The effect of tillage was assessed through comparisons of R and IR samples taken before and after subsoiling tillage in areas harvested with F + S and H + F methods. A nested experimental design was used with eight replicates. The harvest operation (F + S and H + F methods) in eucalyptus plantationsincreased soil CO 2 fluxes, which were primarily derived from eucalyptus materials ('new C'). The F + S harvesting method resulted in the highest soil density and soil moisture reduction in the IR. The tillage operation (subsoiling) resulted in higher soil CO 2 fluxes in eucalyptus plantations harvest with F + S and H + F methods. However, the H + F method preserved the older soil organic carbon (40.8% in R and 50.4% IR of C 4 -CO 2 ). The soil in the eucalyptus plantations showed soil CH 4 influxes, and the harvest and tillage (subsoiling) operations did not negatively affect the net soil CH 4 influx in the studied eucalyptus plantations.

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“…The sensitivity of these fractions might vary with site, temperature and moisture regimes, and management practices. Previous studies had demonstrated that soil tillage changes the soil physicochemical properties and affects heat movement in the soil, which subsequently affects soil temperature (Han, Ning, Li, & Cao, 2016;Ussiri & Lal, 2009); additionally, significant correlations between soil temperature and soil moisture content were revealed (Dong et al, 2017). Therefore, measuring the fractions of SOC and elucidating the interactive relationships among different SOC fractions may be indicative of tillage-induced changes in soil quality (Strosser, 2010).…”

mentioning

confidence: 99%

Variations of SOC and MBC observed in an incubated brown loam soil managed under different tillage systems for 12 years

Han

Ning

et al. 2019

Soil Use and Management

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To assess changes in organic carbon pools, an incubation experiment was conducted under different temperatures and field moisture capacity (FMC) on a brown loam soil from three tillage practices used for 12 years: no‐till (NT), subsoiling (ST) and conventional tillage (CT). Total microbial respiration was measured for incubated soil with and without the input of straw. Results indicated that soil organic carbon (SOC) and microbial biomass carbon (MBC) under ST, NT and CT was higher in soil with straw input than that without, while the microbial quotient (MQ or MBC: SOC) and metabolic quotient (qCO2) content under CT followed the opposite trend. Lower temperature, lower moisture and with straw input contributed to the increases in SOC concentration, especially under NT and ST systems. The SOC concentrations under ST, with temperatures of 30 and 35°C after incubation at 55% FMC, were greater than those under CT by 28.4% and 30.6%, respectively. The increase in MBC was highest at 35°C for 55%, 65% and 75% FMC; in soil under ST, MBC was greater than that under CT by 199.3%, 50.7% and 23.8%, respectively. At 30°C, the lower qCO2 was obtained in soil incubated under NT and ST. The highest MQ among three tillage practices was measured under ST at 55% FMC, NT at 65% FMC and CT at 75% FMC with straw input. These data indicate the benefits of enhancing the MQ; the low FMC was beneficial to ST treatment. Under higher temperature and drought stress conditions, the adaptive capacity of ST and NT is better than that of CT.

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Impact of tillage management on the short- and long-term soil carbon dioxide emissions in the dryland of Loess Plateau in China

Cited by 32 publications

References 43 publications

Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China

Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China

Short‐term carbon emissions: Effect of various tree harvesting, transport, and tillage methods under a eucalyptus plantation

Variations of SOC and MBC observed in an incubated brown loam soil managed under different tillage systems for 12 years

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