Biomass yield and quality of bioenergy crops grown with synthetic and organic fertilizers

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• 作者：Mahmoud F. Seleiman ; Arja Santanen ; Seija Jaakkola ; P盲ivi Ekholm ; Helin盲 Hartikainen ; Frederick L. Stoddard ; Pirjo S.A. M盲kel盲
• 关键词：Biomass ; LAI ; Nitrogen uptake ; Phosphorus uptake ; Sludge ; Quality
• 刊名：Biomass and Bioenergy
• 出版年：December, 2013
• 年：2013
• 卷：59
• 期：Complete
• 页码：477-485
• 全文大小：966 K

文摘

Utilization of sludge is an attractive option for fertilizing bioenergy crops, since in addition to its valuable macro- and micro-nutrients, it may also contains some pollutants. Therefore, a three-year field experiment was conducted to investigate the suitability of sewage and digested sludge in comparison to synthetic fertilizer on biomass production and its quality in three crop species, with specific attention to the relationship between N availability and biomass accumulation. Fertilizer treatments for each crop species were standardized on the basis of total Nitrogen as follows: maize 120聽kg聽ha^鈭?, fibre hemp 60聽kg聽ha^鈭? and oilseed rape 90聽kg聽ha^鈭? Nitrogen. The highest biomass yield of maize (30聽Mg聽ha^鈭? Dry Mass) and hemp (15聽Mg聽ha^鈭? Dry Mass) was obtained from the sewage sludge treatment. The sludge treatment also gave the highest leaf Nitrogen mass in biomass of both maize (14聽g聽kg^鈭?) and hemp (18聽g聽kg^鈭?) at 60 DAS (flowering stage). Sewage sludge increased slightly gross energy yield of maize (438聽GJ聽ha^鈭?) and hemp (272聽GJ聽ha^鈭?) in comparison to other treatments. The mass fraction of ash and the combustion-relevant elements such as Chlorine, Potassium, Sodium and Calcium were lower in crops fertilized with sewage sludge than in those fertilized with synthetic fertilizer. In conclusion, sewage sludge produced as high biomass yield as synthetic fertilizers. In addition, it improved growth and quality of biomass.