Greenhouse Gas Emissions from Cotton Field under Different Irrigation Methods and Fertilization Regimes in Arid Northwestern China

Wu, Jie; Guo, Wei; Feng, Jing; Li, Lanhai; Yang, Haishui; Wang, Xiaohua; Xin-min, Bian

doi:10.1155/2014/407832

Cited by 20 publications

(11 citation statements)

References 48 publications

(55 reference statements)

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“…Despite limited impacts on grain yield in the first year after application, biochar application significantly reduced GWP and GHGI by an average of 23% and 25%, respectively (Table 3). Decreases in GWP and GHGI may have been linked to increased SOC contents [23,24]. The result was consistent with [5] who conducted a similar study in upland cotton field in northwest China.…”

Section: Discussionsupporting

confidence: 79%

Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region

et al. 2018

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Abstract:In rainfed agricultural ecosystems in northwest China, improving soil fertility and reducing greenhouse gas (GHG) emissions are key factors for developing sustainable agriculture. This study determined the short-term effects of different biochar amendment rates on diurnal and seasonal variations of GHG emissions in the Loess Plateau to produce a background dataset that may be used to inform nutrient management guidelines for semiarid environments. Biochar produced by pyrolysis at 300-500 • C from maize straw was applied at rates of 0, 10, 20, 30, 40, and 50 t ha −1 (T0, T1, T2, T3, T4, T5), respectively. The results indicated that in the first year after the application, T3, T4, and T5 treatments increased soil organic carbon (0-10 cm) by 54.7%, 56.3%, and 56.9% compared to the other treatments. In the first, year, biochar amendment decreased diurnal CH 4 and N 2 O flux by an average of 17-119% compared to T0, among which T3 had the lowest mean value. T3 and T4 also had similar mean CO 2 flux, which was 33% lower than T0. Application of 30 t ha −1 biochar produced the lowest cumulative CO 2 and N 2 O emissions of 2300 and 4.07 kg h −1 , respectively. Biochar amendment showed no effect on grain yiel but reduced the global warming potential and GHG emission intensity by an average of 23% and 25%, respectively. The biochar application rate of 30 t ha −1 under the conditions of this study may be an appropriate rate for improving soil C sequestration and mitigation of GHG emissions in the first year after its application to soils on semi-arid Loess Plateau.

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Section: Discussionsupporting

confidence: 79%

Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region

et al. 2018

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“…A cotton study in China showed that drip irrigation, which uses less water than furrow irrigation could significantly decrease N 2 O emissions when combined with certain management practices. Drip irrigation with a plastic film mulching decreases N 2 O emissions by 36% compared to the furrow irrigation, which is mulch-free [59]. N 2 O emissions were also reduced in a rapeseed study performed in China in a sandy loam soil [88].…”

Section: Effects Of Irrigation On N 2 O Emissionsmentioning

confidence: 94%

“…For example, a study performed on cotton crops grown in heavy loam soils of Xinjian, China, showed that soils acted as a CH 4 sink under both furrow and drip irrigation, and that the degree of sequestration was dependent on season. Under drip irrigation, larger soil CH 4 uptake was observed than in furrow-irrigated fields (−2.92 kg CH 4 ha −1 under furrow irrigation versus −8.87 kg CH 4 ha −1 under drip-irrigation) [59]. Similarly, CH 4 emissions reduced up to 350 kg CH 4 ha −1 in a loam soil in Spain when sprinkler irrigation was applied to the paddy field instead of flood irrigation [68].…”

Section: Effects Of Irrigation On Ch 4 Emissionsmentioning

confidence: 94%

“…Severe droughts in many regions of the world has been attributed to climate change, which has led many farmers toward adopting deficit irrigation methods [58]. Reduced irrigation has the potential to decrease GHG emissions by optimizing the nitrogen and carbon turnover processes in soil [59]. An overall shift toward reduced irrigation strategies can decrease GHG emission from managed lands, particularly in arid systems, however, the mechanistic relationship between different rates of irrigation and GHG emissions are still not well understood.…”

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confidence: 99%

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Irrigation and Greenhouse Gas Emissions: A Review of Field-Based Studies

et al. 2020

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Irrigation practices can greatly influence greenhouse gas (GHG) emissions because of their control on soil microbial activity and substrate supply. However, the effects of different irrigation management practices, such as flood irrigations versus reduced volume methods, including drip and sprinkler irrigation, on GHG emissions are still poorly understood. Therefore, this review was performed to investigate the effects of different irrigation management strategies on the emission of nitrous oxide (N2O), carbon dioxide (CO2), and methane (CH4) by synthesizing existing research that either directly or indirectly examined the effects of at least two irrigation rates on GHG emissions within a single field-based study. Out of thirty-two articles selected for review, reduced irrigation was found to be effective in lowering the rate of CH4 emissions, while flood irrigation had the highest CH4 emission. The rate of CO2 emission increased mostly under low irrigation, and the effect of irrigation strategies on N2O emissions were inconsistent, though a majority of studies reported low N2O emissions in continuously flooded field treatments. The global warming potential (GWP) demonstrated that reduced or water-saving irrigation strategies have the potential to decrease the effect of GHG emissions. In general, GWP was higher for the field that was continuously flooded. The major finding from this review is that optimizing irrigation may help to reduce CH4 emissions and net GWP. However, more field research assessing the effect of varying rates of irrigation on the emission of GHGs from the agricultural field is warranted.

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“…It has been widely promoted and applied since 1999, and now, the cropland covered by plastic film mulching with drip irrigation accounts for up to 80% of the total irrigated area in the Manas River Watershed. It has widely taken the place of the traditional furrow irrigation and is the predominant irrigation method in recent years in the most of China’s arid regions [ 11 ]. Additionally, the Manas River Watershed is the biggest cotton belt in Xinjiang, with a cotton-planting area of up to 52% of the agricultural land.…”

Section: Introductionmentioning

confidence: 99%

Relationships between carbon fluxes and environmental factors in a drip-irrigated, film-mulched cotton field in arid region

Li¹,

Liu²,

Yang³

et al. 2018

PLoS ONE

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Environmental factors and human activities play important roles in carbon fixation and emissions generated from croplands. Eddy covariance measurements in a drip-irrigated, film-mulched cotton field were used to analyze the relationships between carbon fluxes and environmental factors in Wulanwusu, northern Xinjiang, an arid region of Northwest China. Our results showed that the cumulative net carbon flux (NEE) was -304.8 g C m-2 (a strong sink) over the whole cotton growing season in 2012, which was more than that in cotton cropland without plastic film mulching and drip-irrigation. Moreover, when time is scaled up from a half-hour to a month, the correlations of gross primary production (GPP) to air temperature (Tair), net solar radiation (Rn) and soil water content (SWC) gradually become stronger due to ecosystem resistance and resilience as well as the protection of plastic film mulching. The GPP is more strongly correlated with Rn than Tair at time scales from minutes to days, while it reverses at time scales from days to weeks. This outcome is largely determined by the biochemical characteristics of photosynthesis. SWC and vapor pressure deficit (VPD) at all time scales are weakly correlated with GPP because plastic film mulching and regularly drip-irrigation allow soil to maintain sufficient water.

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Greenhouse Gas Emissions from Cotton Field under Different Irrigation Methods and Fertilization Regimes in Arid Northwestern China

Cited by 20 publications

References 48 publications

Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region

Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region

Irrigation and Greenhouse Gas Emissions: A Review of Field-Based Studies

Relationships between carbon fluxes and environmental factors in a drip-irrigated, film-mulched cotton field in arid region

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