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| Production Efficiency Analysis of Solar Greenhouse and Plastic Big-arch Shelter in Beijing |
| LI Zhong-ming1，SHEN Jun1，WANG Zhong2，GAO Li-hong1，CHEN Qing-yun1 ，GUO Yu-xiao3 |
| 1College of Agronomy and Biotechnology，China Agricultural University，Beijing 100193，China|2Beijing Production and Marketing Service Station for Superiors Agricultural Products，Beijing 100101，China|3Beijing Agricultural Technology Extension Station，Beijing 100029，China |
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Abstract From April to August 2010，we visited 804 practitioners（791 households and 13 enterprises/cooperatives）in 13 counties，63 towns and 124 villages，and investigated the overall situations and economic efficiencies of solar greenhouse and plastic big-arch shelter from 2009-2010．The results showed that the input-output ratio of edible fungus，flower and strawberry were higher than vegetables and melon in solar greenhouse，of which the annual yield benefit per hectare of edible fungus was the highest- 538 430.1 yuan|vegetables gained the lowest-120 046.35 yuan per hectare．The average benefit of plastic big-arch shelter was far less than the solar greenhouses，in which vegetables were 34.29% lower than in solar greenhouse，melon was 28.94% lower．The solar greenhouse is more possible to gain high efficiency than plastic big-arch shelter．The lowest proportion of high-efficiency gained by vegetables in solar greenhouse is 7.14%，while in plastic big-arch shelter is only 3.06%．Multiple crops benefits were significantly higher than one big crop both in solar greenhouse and plastic big-arch shelter．This paper puts forward suggestions of optimizing planting structure，reasonably arranging crops，strengthening technical training，improving crop yield and quality，exerting cooperative’s advantage，and expanding sales channels.
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Received: 03 August 2011
Published: 11 October 2011
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