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Registros recuperados: 4
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Energy efficiency of organic pear production in greenhouses in China Organic Eprints
Liu, Y.; Langer, Vibeke; Høgh-Jensen, Henning; Egelyng, Henrik.
The development of organic protected cultivation taking place in densely populated areas has raised the question whether it is an environmentally friendly production system. The present study investigated energy consumption of organic pear production in two production systems, namely in traditional Chinese solar greenhouse and in the open field. In both production systems, energy output/input ratio and energy productivity were used as indicators to determine the energy efficiency; yield, cost of production, net economic return pear land area unit and benefit/cost ratio were used to evaluate economic productivity. The analysis results indicated that energy input and energy output in the solar greenhouse were higher than in open field per land area; whereas...
Tipo: Journal paper Palavras-chave: Farm economics; Greenhouses and coverings; Biodiversity and ecosystem services; Environmental aspects.
Ano: 2010 URL: http://orgprints.org/18294/1/Linda_Renew_Agric_Food_Syst.pdf
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Market Integration Shape Organic Farmers’ Organisation Organic Eprints
Sultan, T.; Mursal, A.; Salam, S.G.; Liu, Y.; Oelofse, M.; Knudsen, M.T.; El-Araby, A.; Delve, R.J.; Hauser, M.; Kledal, P.; Egelyng, H.; Halberg, N.; Høgh-Jensen, H..
Increasing consumption of organic products in globalised food chains will require the involvement of thousands more smallholder farmers in many regions of the world. A study of Egypt, China and Uganda identified the three key factors of property rights regimes, cultural differences and social organisation as determents of the supply chain organization and farmers’ degree of direct integration in the export markets. Patterns are emerging where smallholder farmers are being socially and economically linked to larger farmers who may do some processing before the raw materials are handed over to the contracting company. Where transactions costs are high, local communities may develop and contract out the land directly to exporting companies who farm using...
Tipo: Conference paper, poster, etc. Palavras-chave: Policy environments and social economy "Organics" in general Markets and trade Processing; Packaging and transportation Produce chain management.
Ano: 2008 URL: http://orgprints.org/11664/1/Sultan_11664_ed.pdf
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Nepticulidae (Lepidoptera) in China, 1. Introduction and Stigmella Schrank feeding on Fagaceae Naturalis
Nieukerken, E.J. van; Liu, Y..
The Stigmella species feeding on Fagaceae collected in China in 1984 are described and all known East Asian species are reviewed. In total 13 species are recognized: 12 are tentatively grouped in the ruficapitella-group and one in the caesurifasciella-group. The ruficapitella-group includes here also the castanopsiella-group and the suberivora-group. Stigmella kao, S. circumargentea, S. vandrieli and S. lithocarpella are described as new species from Yunnan and S. fumida Kemperman & Wilkinson is also reported from Yunnan. From Heilongjiang four species are reported: S. omelkoi Puplesis, S. fervida Puplesis (on basis of mines only), S. dentatae Puplesis and S. aladina Puplesis. Three new synonyms are proposed: S. quercifaga Kemperman & Wilkinson...
Tipo: Article / Letter to the editor Palavras-chave: Nepticulidae; Stigmella; Fagaceae; Quercus; Cyclobalanopsis; Castanopsis; Lithocarpus; Yunnan; Heilongjiang; East-Palaearctic; Hostplant relationships; Leafminers; 42.75.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/227748
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Relationship between the crystallographic orientation and the "alexandrite effect" in synthetic alexandrite IRD
Liu, Y.; Shigley, J.E.; Fritsch, Emmanuel; Hemphill, S..
Tipo: Text Palavras-chave: MINERAL; COULEUR; CRISTALLOGRAPHIE; SPECTRE; CHRYSOBERYL; ALEXANDRITE.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:010004071
Registros recuperados: 4
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