Emergy analysis for ‘Four in One’ peach production system in Beijing

Wei, Xu; Chen, Bin; Yan, Qiben; Lin, Cong; Chen, G.Q.

doi:10.1016/j.cnsns.2007.09.016

Cited by 69 publications

(27 citation statements)

References 20 publications

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“…They may focus on the reduction of purchased emergy and increase the feedback efficiency of internal resources, such as through exploring new production modes, including organic production [16] and the integrated production system (integrated planting, breeding and aquaculture systems) [18]. Overall, ESDAS can satisfy the business requirements and achieve the effective automatization and computerization of emergy analysis and sustainability evaluation.…”

Section: Testing Results Analysismentioning

confidence: 99%

“…However, it is noteworthy that the comparison with other crops is potentially risky due to the difference in crops, geographical factors, management and other factors, which is imperfect and needs to be improved in the future. Notes: the quoted data of fruit production systems were referenced as follows: protected peach [18], grapefruit [44], apple [40], banana [24] and Orange [16].…”

Section: Testing Results Analysismentioning

confidence: 99%

“…The non-renewable natural resources mainly refer to the soil with its chemical energy is provided in the form of nutrients to plants. The models used to calculate the natural resource emergy are as follows [4,18]: …”

Section: Model Basic Data Processingmentioning

confidence: 99%

“…Therefore, emergy analysis has become an effective and powerful evaluation method for agricultural ecological-economic systems after about 30 years of development. This method is also widely applied in many fruit and crop production systems, including red orange production [16]; "Four-in-One" peach production system [18]; production systems of four kinds of southern Chinese fruits (banana, papaya, guava, and wampee) [24]; banana cropping systems in Guadeloupe [25]; one coffee farm [26]; three wetland fish farming systems [27]; and an Italian sustainable agricultural system [28].…”

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confidence: 99%

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Design and Implementation of Emergy-Based Sustainability Decision Assessment System for Protected Grape Cultivation

et al. 2015

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Abstract:The characteristic "high input and output" in protected production has caused some environmental and ecological issues. Hence, emergy-based sustainability assessments are necessary and valuable. However, traditional emergy analysis is time consuming, tedious, and inefficient. Such disadvantages can be addressed by the integration of emergy analysis with information technology. This paper reports the development of the emergy-based sustainability decision assessment system (ESDAS) for protected grape cultivation systems. This system was established by first analyzing the business process, users, and requirements through survey, and the findings of which were used to design the system's function, architecture, database, model base, and knowledge base with a combination of emergy methods. The results showed that ESDAS passed the system test and achieved the real-time calculation of emergy data and the automatization of emergy analysis. Therefore, this research is a beneficial attempt to apply information technology in improving the efficiency of sustainability assessments. The results also revealed that the protected grape cultivation system is characterized by a heavy dependence on purchased and non-renewable resource emergy, lower emergy yield ratio, higher emergy investment rate and environmental loading ratio, and lower emergy sustainability index. Some suggestions were made to improve the sustainability of the protected grape system. OPEN ACCESSSustainability 2015, 7 14003

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Section: Testing Results Analysismentioning

confidence: 99%

Section: Testing Results Analysismentioning

confidence: 99%

Section: Model Basic Data Processingmentioning

confidence: 99%

mentioning

confidence: 99%

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Design and Implementation of Emergy-Based Sustainability Decision Assessment System for Protected Grape Cultivation

et al. 2015

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“…Emergy analysis is suitable for evaluating economic and environmental benefit, as well as the sustainability of straw-reuse systems and could help identify appropriate modes of straw reuse. Emergy analysis has been applied to a variety of agro-ecosystems and agricultural biomass reuse industries, such as biogas systems [12,13] and "four-in-one" eco-agricultural systems [14] and agricultural development [15,16]. It has been applied to straw gasification [7] and direct combustion projects [17], agricultural circular economical models [18,19], ethanol production, cropping systems, and other agricultural industries.…”

Section: Introductionmentioning

confidence: 99%

Emergy Evaluation of Different Straw Reuse Technologies in Northeast China

Zhang

2015

Sustainability

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Open burning of straw in China has degraded agricultural environments and has become a contributor to air pollution. Development of efficient straw-reuse technologies not only can yield economic benefits but also can protect the environment and can provide greater benefit to society. Thus, the overall benefits of straw-reuse technologies must be considered when making regional development planning and enterprise technology decisions. In addition, agricultural areas in China cross several climatic zones and have different weather characteristics and cultural conditions. In the present study, we assessed five types of straw-reuse technologies (straw-biogas production, -briquetting, -based power generation, -gasification, and -bioethanol production), using emergy analysis, in northeast China. Within each type, five individual cases were investigated, and the highest-performing cases were used for comparison across technologies. Emergy indices for comprehensive benefits for each category, namely, EYR, ELR, and ESI were calculated. Calculated indices suggest that straw-briquetting and -biogas production are the most beneficial technologies in terms of economy, environmental impact, and sustainability compared to straw-based power generation, -gasification, and -bioethanol production technologies. These two technologies can thus be considered the most suitable for straw reuse in China.

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Silicon enhances yield and nitrogen use efficiency of tropical low land rice

et al. 2020

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High nitrogen (N) rate often leads to low yield of rice due to lodging and mutual shading. This study was conducted to ascertain whether silicon (Si) could enhance yield response of rice to higher N rate by enhancing rigidity of plant parts and improving photosynthesis. The effects of Si and N on crop growth, photosynthesis, N use efficiencies and yield of rice were investigated during wet season (June to November) in sub-humid tropical region of India. An increasing trend in crop growth rate with Si at all levels of N was observed. Silicon reduced the flag leaf angle making the leaf more upright and enhanced flag leaf N content. Leaf chlorophyll concentration and single leaf photosynthesis rate were higher with Si compared to without Si at flowering stage. Both N and Si significantly affected panicle number and grain filling.Application of 200 kg SiO 2 ha −1 and 100 kg N ha −1 produced the highest number of panicle per square meter, filled grain per panicle and yield. Significant yield increases ranging from 8.2-16.9% were observed with Si compared to without Si. Both N and Si treatments had significant effects on N uptake and N use efficiency. Agronomic N use efficiency and N recovery efficiency were higher with Si compared to without Si. The highest physiological N use efficiency was recorded with 200 kg SiO 2 ha −1 and 80 kg N ha −1 . Silicon may enhance yield response of rice to higher N rate by improving source (photosynthetic) capacity and sink (reproductive organ) strength.Abbreviations: DMA, dry matter accumulation; FL, flowering; HI, harvest index; MT, maximum tillering; NRE, nitrogen recovery efficiency; NUE a , agronomic nitrogen use efficiency; NUE p , physiological nitrogen use efficiency; PFP N , partial factor productivity of nitrogen; PI, panicle initiation; PM, physiological maturity.

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Emergy analysis for ‘Four in One’ peach production system in Beijing

Cited by 69 publications

References 20 publications

Design and Implementation of Emergy-Based Sustainability Decision Assessment System for Protected Grape Cultivation

Design and Implementation of Emergy-Based Sustainability Decision Assessment System for Protected Grape Cultivation

Emergy Evaluation of Different Straw Reuse Technologies in Northeast China

Silicon enhances yield and nitrogen use efficiency of tropical low land rice

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