Methane Yield and Feed Quality Parameters of Mixed Silages from Maize (Zea mays L.) and Common Bean (Phaseolus vulgaris L.)

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• 作者：Liina Nurk ; Rüdiger Graβ ; Carola Pekrun ; Michael Wachendorf
• 关键词：Intercrop silages of maize and beans ; Biogas batch test ; Methane yield
• 刊名：BioEnergy Research
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：10
• 期：1
• 页码：64-73
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Plant Sciences; Plant Genetics & Genomics; Plant Breeding/Biotechnology; Plant Ecology; Wood Science & Technology;
• 出版者：Springer US
• ISSN：1939-1242
• 卷排序：10

文摘

European agricultural policy increasingly focuses on environmental friendly cropping systems. Intercropping of maize (Zea mays L.) and common beans (Phaseolus vulgaris L.) has been suggested as an alternative cropping system with environmental benefits. The aim of this study was to assess methane yield potential of mixed silages. Based on material from two field experiments at three sites in Germany, mixed silages were produced with proportions of individual components varying from 0 to 100 % of fresh matter in increments of 12.5 %. Chemical parameters (neutral detergent fiber (NDF), acid detergent fiber (ADF), crude protein (XP), starch, sugar, and crude fat) were determined, and batch tests were performed to measure methane yield potential from silages. With increasing bean proportion, concentrations of XP increased while NDF, methane yield, and methane content decreased. While methane yield showed a negative relationship with XP content (R2 = 0.56***), a positive relation was found with NDF (R2 = 0.55***). The reduction of methane yield of circa 1 L of methane per each additional bean percentage in the silages could not be explained by the chemical parameters of the silages. It is hypothesized that other chemical compounds, such as lectins, which were not determined in the present study, may have influenced methane production.