Nitrous oxide emissions from soils under traditional cropland and apple orchard in the semi-arid Loess Plateau of China

Pang, Junzhu; Wang, Xiaoke; Peng, Changhui; Mu, Yujing; Ouyang, Zhiyun; Lü, Fei; Zhang, Hongxing; Zhang, Shuoxin; Liu, Wenzhao

doi:10.1016/j.agee.2018.09.028

Cited by 33 publications

(15 citation statements)

References 49 publications

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“…Semiarid and arid lands account for 43.1% of China's land area, and agriculture in these areas has experienced a considerable water shortage because of the high evaporation rates and low precipitation [17]. Although irrigation can ensure the normal growth of trees and increase fruit yield in semiarid and arid areas, the environmental impacts may be high if improper irrigation management is carried out in orchards.…”

Section: Comparable Impacts Of the Furrow And Drip Irrigated Systemsmentioning

confidence: 99%

“…On the other hand, droughts have a negative effect on agriculture production and represent one of the most destructive climate disasters worldwide [16]. Due to economic development and population growth, the extensive land-use exchange for fruit cultivation (especially for apples and pears) on the Loess Plateau increases rapidly [17]. However, the Loess Plateau is located in northwestern China, characterized by a semiarid and arid climate and severe water shortages.…”

Section: Introductionmentioning

confidence: 99%

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Environmental Assessment of Furrow vs. Drip Irrigated Pear (Pyrus bretschneideri Rehd.) Production Systems in Loess Plateau (China)

et al. 2021

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Irrigation systems increase fruit yield of water shortage orchards in semiarid and arid lands, but their environmental impacts remain unclear. This study carries out a comparative cradle-to-gate life cycle assessment (LCA) of the furrow and drip irrigated pear production systems in the Loess Plateau of China based on 2009–2018 inventory data from integrated experimental stations. The water depletion (WD), water footprint (WF), global warming (GWP), acidification (AP), and eutrophication (EP) potentials of the furrow and drip irrigated pear production systems were calculated and compared, including the orchard installation phase (phase I), primary growing phase (phase II), low production phase (phase III), and full production phase (phase IV). Results indicated that the cumulative WD, GWP, AP, and EP of the drip irrigated system were 148.3 m3, 130.1 kg CO2-eq, 0.9 kg SO2-eq, and 0.6 kg PO4-eq per ton of pear fruit harvest, respectively, which were 37.3–73.5% lower than those of the furrow irrigated system. The GWP, AP, EP, and WD of phase I to III contributed 39.3–46.1% in the drip irrigated system vs. 27.8–38.6% in the furrow irrigated system of the total amount, which should not be neglected in perennial orchard systems. The annual WFs were 0.9, 0.2, and 0.2 m3 kg−1 year−1 in phases II, III, and IV of the drip system, respectively, which were 50–71.4% lower than that of the furrow system. Green WF of furrow and drip irrigated systems were approximately the same, but the blue WF and grey WF of drip irrigation systems were 35.7–62.1% and 66.0–73.2% lower than those of the furrow irrigated system. The drip irrigated pear production system significantly mitigated environmental impacts and WFs, mainly due to reduced fertilizer application, water consumption, electricity, and diesel demand. Irrigation that changed from a furrow to a drip system was responsible for most environmental reductions, but 8% decreases of yields in phase IV. The outcomes from assessing the furrow and drip irrigated pear production systems could provide useful information for decision-making by the pear orchardists in the Loess Plateau.

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Section: Comparable Impacts Of the Furrow And Drip Irrigated Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Environmental Assessment of Furrow vs. Drip Irrigated Pear (Pyrus bretschneideri Rehd.) Production Systems in Loess Plateau (China)

et al. 2021

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“…The precipitation increases the soil moisture content, which instantaneously influences the soil microbes, soil pH, bulky density, and soil pore space [15,52], hence releasing the GHG fluxes. The increase in the soil microbial activities enhances soil respiration and aeration, which tend to physically boost the production of CO 2 [15,18] and N 2 O [20]. The onset of precipitation also directly influences the soil microbes [53], through reducing the water limitations to the soil microbes and, hence, increasing their respiration and releasing oxidized soil carbon in the form of CO 2 [54].…”

Section: The Effect Of Daily Precipitation On the Soil Greenhouse-gasmentioning

confidence: 99%

“…The seasonal precipitation increases soil moisture, which boosts the growth of fungal biomass and other microbial activities. The increase in the microbial biomass and activities increases soil aeration and respiration rate, which amplifies the production of CO 2 [15,18] and N 2 O [19,20]. The increase in soil respiration from the microbial activities after the onset of precipitation could further accelerate the oxidation of soil organic matter, with transient effects on the seasonal GHG fluxes.…”

Section: Introductionmentioning

confidence: 99%

Variations in Greenhouse Gas Fluxes in Response to Short-Term Changes in Weather Variables at Three Elevation Ranges, Wakiso District, Uganda

Fatumah

Ndakidemi

2019

Atmosphere

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Weather conditions are among the major factors leading to the increasing greenhouse gas (GHG) fluxes from the agricultural soils. In this study, variations in the soil GHG fluxes with precipitation and soil temperatures at different elevation ranges in banana–coffee farms, in the Wakiso District, Uganda, were evaluated. The soil GHG fluxes were collected weekly, using the chamber method, and analyzed by using gas chromatography. Parallel soil temperature samples were collected by using a REOTEMP soil thermometer. Daily precipitation was measured with an automated weather station instrument installed on-site. The results showed that CO2, N2O, and CH4 fluxes were significantly different between the sites at different elevation ranges. Daily precipitation and soil temperatures significantly (p < 0.05) affected the soil GHG fluxes. Along an elevation gradient, daily precipitation and soil temperatures positively associated with the soil GHG fluxes. The combined factors of daily precipitation and soil temperatures also influence the soil GHG fluxes, but their effect was less than that of the single effects. Overall, daily precipitation and soil temperatures are key weather factors driving the soil GHG fluxes in time and space. This particular study suggests that agriculture at lower elevation levels would help reduce the magnitudes of the soil GHG fluxes. However, this study did not measure the soil GHG fluxes from the non-cultivated ecosystems. Therefore, future studies should focus on assessing the variations in the soil GHG fluxes from non-cultivated ecosystems relative to agriculture systems, at varying elevation ranges.

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“…There is therefore a need to simultaneously address problems associated with production efficiency, food safety and environmental considerations linked to apple production. Third, apple production tends to result in more negative environmental impacts when compared to, for example, traditional crop farming (Pang et al, 2019;Wagner et al, 2016). However, understanding the determinants of sustainable farming practices associated with China's apple production systems has not been a focus of research.…”

Section: Introductionmentioning

confidence: 99%

Identifying barriers to sustainable apple production: A stakeholder perspective

Jin

Cao

et al. 2022

Journal of Environmental Management

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Apple is one of the most important cash crops in China. However, negative economic, environmental and social impacts are associated with its production. This study aims to apply a holistic systems perspective to understand existing problems associated with apple production in China and use this information to improve its sustainability. A structured survey was administered to farmers (n = 245) in Shandong and Shanxi provinces, combined with semi-structured interviews with apple supply chain stakeholders (n = 25). Themes, dimensions and relationships were identified based on an inductive thematic analysis of interview data, and then triangulated against the survey data. Interpretive Structural Modelling and Cross-Impact Matrix Multiplication Applied to Classification methods were applied to investigate interrelationships and effects of the elicited elements within the system. The results indicated that various environmental, economic and social problems are associated with apple production in China, including environmental and health risks associated with synthetic input applications, yield instability, deterioration of apple quality, farmers' uncertainty about accessing routes to market, and the ageing farming workforce. The interaction of socio-economic and supply chain issues has contributed to the system "lock-in" to unsustainable practices within the apple production system. Existing agricultural policies were ineffective as they did not include policy leverage to mitigate the multiple factors driving lock-in to unsustainable practices within the system. The research has provided evidence to enable policymakers to develop effective and targeted strategies to facilitate sustainable production within the apple production system. In particular, the future policy mix should consider the entirety of the food system including perspectives and requirements of different stakeholders. The three-stage approach applied has demonstrated its feasibility of investigating sustainability issues facing a particular industry within a specific cultural and policy context.

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Nitrous oxide emissions from soils under traditional cropland and apple orchard in the semi-arid Loess Plateau of China

Cited by 33 publications

References 49 publications

Environmental Assessment of Furrow vs. Drip Irrigated Pear (Pyrus bretschneideri Rehd.) Production Systems in Loess Plateau (China)

Environmental Assessment of Furrow vs. Drip Irrigated Pear (Pyrus bretschneideri Rehd.) Production Systems in Loess Plateau (China)

Variations in Greenhouse Gas Fluxes in Response to Short-Term Changes in Weather Variables at Three Elevation Ranges, Wakiso District, Uganda

Identifying barriers to sustainable apple production: A stakeholder perspective

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