کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9447392 | 1305224 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Advantages of the integrated pig-biogas-vegetable greenhouse system in North China
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
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چکیده انگلیسی
An integrated pig-biogas-vegetable greenhouse system (PBVGS) was designed and studied in Laiwu, Shandong Province of North China from 2001 to 2002, where 20 groups of PBVGS and their corresponding controls were investigated. The PBVGS involves building a pigsty and a biogas digester in a vegetable greenhouse, putting pig dung into the biogas digester for fermentation, using the biogas for increasing illumination and air temperature in the greenhouse, and using the fermented waste as organic manure. The data indicate that the pig growth, biogas production and vegetable production were effectively improved in PBVGS, and that ecological, economic and social benefits were simultaneously achieved. The average annual net income of a standard PBVGS was 10,900 RMB, with an increase of 58.0% over its traditional non-integrated parts. It could use up 14,000Â kg fresh pig dung and produce 10,000Â kg organic manure one year for the improvement of soil fertility. The daily net weight increase for a pig in PBVGS averaged 0.82Â kg, 227.6% higher than its controls. The average yield per hectare of cucumbers and tomatoes, increased by 18.4 and 17.8% over their controls, respectively. In addition, the biogas produced in the digester increased by 32.4% annually. Based on biogas fermentation, the PBVGS provides a fine ecological cycle from livestock feeding to vegetable production, resulting in a higher conversion efficiency in nutrient cycle and energy flow.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Engineering - Volume 24, Issue 3, 20 February 2005, Pages 175-183
Journal: Ecological Engineering - Volume 24, Issue 3, 20 February 2005, Pages 175-183
نویسندگان
Xinshan Qi, Shuping Zhang, Yuzhi Wang, Renqing Wang,