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The emergy analysis of the eco\|economy system in typical farming and grazing households in Mu Us sandland

HuBingHui,Liao YunCheng,

生态学报 , 2009,
Abstract: As the most basic production unit, eco\|economy systems of farming and grazing households are of significance to the implementation and outcome of national policies. In this paper, eco\|economy systems of farming and grazing households, in Mu Us sandland acrossing Inner Mongolia Autonomous Region and Shaanxi Province,were studied by emergy theory and emergy analysis methods. The emergy input and output structure of different industrial models in Wushen banner, where grazing is dominant, and Yuyang district, where farming is the case, have been compared and analyzed. The total characteristics of pattern and development of typical eco\|economy systems of farming and grazing households are described and compared quantitatively by net emergy output ratio, emergy investment ratio, environmental loading ability, emergy power density, productivity of unit acreage, emergy cost per capita, emergy possession per capita, system production priority, system stability index and sustainability index. We hope our study could help to provide strategies for development and optimization of farming and grazing household industrial models in farming\|dominant zones and grazing\|dominant zones of Mu Us sandland.

自然资源学报 , 1997,
Abstract: On the basis of the vegetational investigation in Maowusu sandland, the family and genera composition,geographic components, life form and ecological characteristics of the flora of the shrub resource in the area are analysed. The important position and significance of the shrub in this special ecotone of the geographic landscape are analysed too. According to these, we put forward the countermeasures for the protection and restoration of the diversification of the shrub resource.
Pellumb Harizaj
Albanian Journal of Agricultural Sciences , 2010,
Abstract: This first attempt of emergy synthesis in Albania aims at demonstrating the potentiality of this methodology in analyzing and integrating different systems on a common basis. Some emergy indices are calculated by identifying most of the emergy flows from within and outside the system. Renewable carrying capacity at present living standard (R/U) (Population) with a value 4.52x 105 means that some 14.3 % of the actual population of 3.16x106 might be an optimum level for sustainable economic development of Albania. Sustainability index SI = 0.25 suggests an increase of attention to improve the ratio between Emergy Yield Ratio (EYR) and Environmental Load Ratio (ELR). In 2007 Albania`s Emergy/GDP ($) ratio was 5.39 x1012 while the Emergy/GWP ($) was 5.59x1011. This means that in the international trade Albania gives 9.6 times more emergy than it receives for each dollar of exports. The aforementioned fact is combined with a four fold negative trade balance (Net Exports = -3.09x109). These two indicators give a somehow pessimistic view of Albania`s economic development for the time being. Calculation of emergy synthesis for several years might offer a better understanding of development tendencies, and consequently better recommendations for people involved in policy making and environment management. Emergy synthesis might orient them towards more rational approaches to find out the best alternatives in harmonizing economic profits with the environment health.
Effect of Concentrate Supplementing after Grazing on Growth Performance of Tibetan Sheep in Alpine Pastoral Area during Cold Season

- , 2016, DOI: 10.7606/j.issn.1004-1389.2016.08.003
Abstract: 为揭示冷季牧归后补饲精料对藏系绵羊生长性能的影响,选取60只体况相近的3岁藏系绵羊(公母各半)随机分成单一放牧组和归牧补饲组,每组公、母羊各15只。单一放牧组羊只采用冷季单一放牧,牧归补饲组羊只采用与放牧组相同的放牧活动,并在牧归后按每只150 g·d-1的饲喂量补饲某品牌精料补充料,为期70 d。结果表明,牧归后补饲精料极显著提高藏系绵羊的前期增量、前期日均增量、后期增量、后期日均增量、全期增量、全期日均增量、增量比例和冷季养殖净收益。牧归补料组公羊的全期增量和增量比例优于母羊,但不同性别羊只对冷季养殖净收益差异不显著。因此,牧归后补饲精料可以提高高寒牧区藏系绵羊冷季增量和养殖收益。
In order to reveal the effect of concentrate supplementing after grazing on growth performance of Tibetan sheep during cold season,60 Tibetan sheep (30 male and 30 female,3-year-old) with familiar body conditions were divided to two groups: traditional grazing group (male 15,female 15) and supplementing group (male 15 and female 15). During the experimental period of 70 days,sheep in grazing group were fed with traditional grazing model,each sheep in supplementing group was fed 150 g·d-1 of concentrate feed after grazing. Results showed that concentrate supplementing after grazing significantly increased earlier mass gain,earlier average daily mass -gain,later mass gain,later average daily mass gain,total mass gain,total average daily mass gain,gain rate and economic benefit of sheep breeding. The total mass gain and gain rate of male sheep in supplementing group was better than female sheep,sex factors had no effect on net economic benefit of sheep breeding during the experiment. In conclusion,concentrate supplementing after grazing is a feasible method to increase mass gain in sheep and pastoralists’ economic benefit in alpine pastoral area during cold season.
Wind Resource Assessment in Europe Using Emergy  [PDF]
Subodh Paudel,Massimo Santarelli,Viktoria Martin,Bruno Lacarriere,Olivier Le Corre
Physics , 2015, DOI: 10.5890/JEAM.2014.12.006
Abstract: In context of increasing use of renewable sources, it is of importance to correctly evaluate the actual sustainability of their implementation. Emergy analysis is one of the possible methods useful for such an assessment. This work aims to demonstrate how the emergy approach can be used to assess the sustainability of wind energy resource in Europe. The Emergy Index of Sustainability (EIS) and the Emergy Yield Ratio (EYR) are used to analyze 90 stations of European regions for three types of wind turbines. To do so, the simplified Chou wind turbine model is used for different set of parameters as: nominal power and size of the wind turbines, and cut-in and cut-out wind speeds. Based on the calculation of the emergy indices, a mapping is proposed to identify the most appropriate locations for an implementation of wind turbines in European regions. The influence of the wind turbine type on the sustainability is also analyzed, in link with the local wind resource. Thus, it is concluded that the emergy sustainability indices are sensitive to the wind turbine design parameters (size, cut-in and cut-out wind speed).
Emergy evaluation of the environment and economy of Hong Kong
Lan Shengfang,
Lan Shengfang
,Howard T. Odum

环境科学学报(英文版) , 1994,
Abstract: An environment-economy systems analysis of Hong Kong has been carried out using a newmeasure emergy for evaluating its environmental resource basis and economy as well as its international e-conomic relations for recommending a sustainable development. Emergy is the total energy uf one kind re-quired directly and indirectly to form a resource, product or service. It provides a common basis for mea-surement of the value of environment and economy.A preliminary analysis of emergy contributions supporting the system of Hong Kong is presented inthis paper.
Researches on the emergy analysis of Poyanghu wetland

CUI Lijuan,ZHAO Xinsheng,

生态学报 , 2004,
Abstract: The Emergy and material flux of Poyanghu wetland ecosystem were analyzed in this paper by Emergy analysis theory of ecological economy system which was created by H.T.Odum. The article concludes that four steps should be included in the emergy analysis process of wetland ecological benefits: (1) emergy analysis concept ional system should be built up, which can reflect the emergy analysis method; (2) emergy analysis table being drafted out and the emergy value being calculated; (3) emergy indices being esti...
New emergy indices for sustainable development
LU Hong-fang,LAN Sheng-fang,LI Lei,PENG Shao-lin,
LU Hong-fang
,LAN Sheng-fang,LI Lei,PENG Shao-lin

环境科学学报(英文版) , 2003,
Abstract: The emergy indices for the evaluation of system‘ s sustainable development ability were studied. Results indicated that the emergy indices are simplified and merged, and a new emergy index for sustainable development(EISD) is deduced. Employing EISD, two cases areconducted. The first one is to compare three different dike-pond agro-ecological engineering modes, which are: melon-melon-cabbage-four domestic fishes (mode I ), melon-melon-cabbage-pig-four domestic fishes (mode H ) and melon-melon-cabbage-pig-four domestic fishes combined with Siniperca chuatsi B. ( mode Ⅲ ).The result is that the EISD of mode I is 0.53. Mode Ⅱ‘ s EISD is 5.26 times of mode I ,and mode Ⅲ‘s EISD is 6.83 times of mode I The second one is to evaluate the development of Zhongshan City, Pearl Delta, during 1996 to 2000.The result indicated that the EISD of Zhongshan had appreciably declined from 1996 to 1998, and quickly improved from 1998 to 2000, partly because of its environment protection and product construction. Both of the two cases studies showed that EISD can assessment the sustainable development ability more roundly, with the consideration of environmental impact and social-economic effect at the same time.
Emergy analysis method of agro-ecosystem

ZHANG Yao-Hui,

中国生态农业学报 , 2004,
Abstract: The concept and theory of the emergy analysis are stated in this paper. And the application of the step and calculating method of emergy analysis in agro ecosystem, the index system of emergy analysis in agro ecosystem, and the significance of emergy analysis on the assessment and quantification of the value of resource and environment are also discussed.
Emergy assessment method for wheat cultivar efficiency and environmental sustainability
Janusz Jankowiak,Ewa Miedziejko
Journal of Agribusiness and Rural Development , 2009,
Abstract: The method based on emergy was applied to quantify the fluxes of the energy, matter and monetary investment use (water, seeds, work, fertilizer and plant protecting agents, fuel, goods and services), productivity, environmental services and sustainability in typical wheat cultivar conducted in Wielkopolska. In order to convert all the flows mentioned into common base (seJ) a conversion factors (solar transformities) were used. In this way it was possible to consider also such flows that are free and generally neglected in the traditional balances. Generally only 52% emergy inflow is delivered by financial investment, while the remaining part, delivered in the form of the environmental services, is free. The Emergy Yield Ratio EYR = 1.14 indicate a low level of output per emergy investment unit. The values of Environmental Loading Ratio ELR = 11 and Emergy Sustainability Index ESI = 0.1 indicate an environmental stress and low level of cultivar sustainability, respectively. The final cultivar product (wheat) has the emergy density 4.35 E12 seJ/kg and transformity 26.3 E4 seJ/J.
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