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| Yield and Quality of Leafy Lettuce Irrigated with Anaerobic Effluent from Swine Farms |
| Received:May 21, 2014 |
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| KeyWord:pig farm;anaerobic effluent;irrigation;leafy lettuce;nitrate;yield |
| Author Name | Affiliation | E-mail | | SHI Ya-nan | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China
Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LIU Ming-da | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | | | ZHANG Ke-qiang | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | ZHAO Jun-yi | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | WANG Feng | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | wangfeng_530@163.com |
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| Abstract: |
| The waste from livestock and poultry farms has become a major agricultural source of environmental pollution in China. In order to utilize farm waste, a vegetable irrigation experiment using anaerobic effluent from pig farms was carried out. The yield and quality of leafy lettuce irrigated with different dilution of anaerobic wastewater were evaluated. The optimal fresh weight and plant height of leafy lettuce were obtained under 1:2 of anaerobic wastewater to fresh water(T3), and the yield was increased by 17.67% in comparison with chemical fertilizer(CK). Irrigation with 100% wastewater decreased the survival rate of leafy lettuce to 78%. In the T3 treatment, leafy lettuce contained the highest content of ascorbic acid and relatively lower concentration of soluble sugar. Under T3 irrigation, MDA content was reduced, and nitrate concentration was lower than the limit of nitrate concentration of leafy vegetables. Copper and zinc concentrations of leafy lettuce under T3 irrigation did not differ from the control. Based on the present result, at least 4.34 hm2 of leafy lettuce-planting area was needed to treat anaerobic effluent generated from 10 000 head pig farm. |
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