Preliminary Study on the Carbon Efficiency of Main Crops Production in North China Plain

Shi, Leigang; Fan, Shaohui; Kong, Fanlei; Chen, Fu

doi:10.3724/sp.j.1006.2011.01485

Cited by 10 publications

(12 citation statements)

References 8 publications

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“…In order to measure the relationship between carbon mission and actual activities of production, many researchers have put forward a series of concepts just like carbon emission intensity [5,6], carbon productivity [7], carbon benefits [8,9], the essence of all these concepts was to reflect the relationship between carbon emission and output of production. Among them, carbon intensity was defined as the carbon emissions per economic benefits produced.…”

Section: Carbon Efficiencymentioning

confidence: 99%

Assessment on the carbon efficiency in the construction stage: a comparative study between prefabricated and conventional construction

Gao

Mao

2017

mocs

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Construction industry is the consuming large amounts of natural resources and at the expense of a heavy environmental burden. Therefore, we need to keep a balance between creating economic benefit through construction and focusing on the influence to the environment with the aim of the value of carbon emissions maximize. The paper puts forward carbon efficiency which provides a linkage between carbon reduction and value creation of construction effectively can reflect construction efficiency. The essence of carbon efficiency is using the lowest environment output to build a construction. Through analysing two cases, result shows that carbon efficiency of prefabricated construction is higher than the conventional construction’s, which improves 25%. Besides, the measures are provided to improve the carbon efficiency of constructing. Enhancing the precast level, implementing prefabricated components standardized, optimizing site management is the main key to realize the low carbon construction.

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Section: Carbon Efficiencymentioning

confidence: 99%

Assessment on the carbon efficiency in the construction stage: a comparative study between prefabricated and conventional construction

Gao

Mao

2017

mocs

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“…Huang [2] Pan [3] 20 1980-2000 1985-2006 [4] 55 Piao [5] 2009 Nature 20 0.026 0.011 Pg a -1 0.013 Pg C a -1 [6] 30 I.…”

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confidence: 99%

The carbon sequestration capacity in crop production system in North China Plain

Shi

Yang

Chen

2011

2011 International Conference on Electrical and Control Engineering

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Crop production systems play a vital role in the global carbon cycle. In order to get a clear understanding the carbon sequestration capacity in crop production system, this paper, based on the agricultural statistical data, adopted computational model of carbon fixation, evaluated the ability of carbon sequestration in crop production system in Wuqiao County of Hebei Province in North China Plain during the last 30 years. The conclusions are summarized as follows: The carbon fixation increases by 370.19 Gg, with average annual growth of 14.81 Gg·a -1 , and the carbon density respectively increases by 9.64 Mg·hm -2 , with average annual growth of 0.39 Mg ha -1 a -1 . The ability of carbon fixation has been increasing, with the ability of carbon sink. The contribution rate of soil is about 55% in improving the carbon sequestration of crop system, while crop is about 45%, of which the proportion is increasing. Straw accounts for about 1/2 in carbon fixation of crops, economic yield accounts for about 1/3, and root accounts for about 1/6. Preliminary results show that improving the efficiency of straw and stabilizing the carbon in soil is an important way of enhancing ability of carbon sequestration in crop production system in North China Plain, which can provide powerful support for achieving low-carbon agriculture and addressing climate change.

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“…The carbon stock of both crop and pasture (rangeland) refers to the carbon stock expressed as CO 2 -eq, which is the net accumulation of photosynthetic products. The carbon stock of both crop and pasture is calculated using equation 9 (Shi et al, 2011b). respectively.…”

Section: Ghg Emissions From Crop Production and Rangelandmentioning

confidence: 99%

“…respectively. The values of CS grain , CS stem , and CS root were calculated using equations (10), 11and (12) (Shi et al, 2011b). In order to evaluate the allocation of carbon to plant parts in the grain crop, the carbon concentration of all plants parts was assumed to be 0.45 g.g -1 .…”

Section: Ghg Emissions From Crop Production and Rangelandmentioning

confidence: 99%

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Supplemental Information 1: Raw Data

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Agricultural production in Minqin Oasis, China, is commonly categorized as intensive crop production (ICP), integrated crop-livestock production (ICLP), intensive livestock production (confined feeding) (IFLP), and extensive livestock production (grazing) (EGLP). The objectives of the present study were to use a life cycle assessment (LCA) to evaluate the on farm energy balances and greenhouse gas (GHG) emissions of agricultural production, and to compare the differences among the four systems. 529 farmers in eight towns of Minqin Oasis were selected to complete a face-to-face questionnaire. AVONA analysis of the average data from 2014 to 2015 indicated that the net energy ratio (Output/Input) for the EGLP system was significantly higher than for each of the other three systems (P < 0.01), whereas the differences among the other systems were not significant. However, the EGLP system generated lower CO 2-eq emissions per hectare of farmland than each of the three other systems (P < 0.01). Relating carbon economic efficiency to market values (Chinese currency, ¥) of agricultural products, indicated that the carbon economic efficiency (¥/kg CO 2-eq/farm) of the IFLP system was significantly greater than that of the three other systems (P < 0.01). The net energy ratios of alfalfa (4.01) and maize (2.63) were significantly higher than the corresponding data of the other crops (P < 0.01). All of the emission sources data for ICP, ICLP, IFLP, and EGLP, when related to the contribution of GHG emissions, showed fertilizer, enteric methane emissions, and plastic mulch, contributed the highest proportions of GHG emissions of all production categories. The path models showed that class of livestock was strongly linked to economic income. The direct effects and total effects of water use efficiency, via their positive influence on energy balances and GHG emissions were much stronger than those of other dependent variables. In conclusion, the present study provides benchmark information on the factors

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Preliminary Study on the Carbon Efficiency of Main Crops Production in North China Plain

Cited by 10 publications

References 8 publications

Assessment on the carbon efficiency in the construction stage: a comparative study between prefabricated and conventional construction

Assessment on the carbon efficiency in the construction stage: a comparative study between prefabricated and conventional construction

The carbon sequestration capacity in crop production system in North China Plain

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