Methane production potential from Miscanthus sp.: Effect of harvesting time, genotypes and plant fractions

被引：63

作者：

Wahid, Radziah ^{[1
,2
]}

Nielsen, Susanne Frydendal ^{[3
]}

Hernandez, Veronica Moset ^{[1
]}

Ward, Alastair James ^{[1
]}

Gislum, Rene ^{[4
]}

Jorgensen, Uffe ^{[3
]}

Moller, Henrik Bjarne ^{[1
]}

机构：

[1] Aarhus Univ, Dept Engn, DK-8830 Tjele, Denmark

[2] Univ Teknol Mara, Fac Chem Engn, Shah Alam 40450, Malaysia

[3] Aarhus Univ, Dept Agroecol, DK-8830 Tjele, Denmark

[4] Aarhus Univ, Dept Agroecol, DK-4200 Slagelse, Denmark

来源：

BIOSYSTEMS ENGINEERING | 2015年 / 133卷

关键词：

Miscanthus; Harvest time; Genotypes; Chemical compositions; Methane yields; BIOGAS PRODUCTION; X GIGANTEUS; CHEMICAL-COMPOSITION; ENERGY CROPS; YIELD; BIOMASS; ACCUMULATION; GROWTH; IMPACT; FIBER;

D O I：

10.1016/j.biosystemseng.2015.03.005

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The perennial C-4 grass miscanthus was evaluated for use as an energy crop for methane production when harvested green in the autumn. Miscanthus x giganteus (M. x giganteus) and Miscanthus sinensis (M. sinensis) were harvested on five occasions, from August to November 2012. Methane yields from stems and leaves were analysed using batch assay after 90 d digestion. Estimated dry matter yields were highest on 1st October for Miscanthus x giganteus and 13th September for Miscanthus sinensis. Cellulose and lignin contents were greater with Miscanthus x giganteus than Miscanthus sinensis and low lignin content in leaves led to rapid degradation during the early periods of anaerobic batch assay. After 90 d of anaerobic digestion, cumulative specific methane yields for Miscanthus x giganteus varied for stem and leaf from 285 to 333 and 286 to 314 Nl (normalised litre) kg(-1) [VS] and 291 to 312 and 298 to 320 Nl kg(-1) [VS] for Miscanthus sinensis. Estimated methane yields per ha were positively correlated with the dry matter yields of miscanthus (r = 0.92) and the optimal harvesting time was between September-October. Methane yield at optimal harvest time was estimated as 3.824 x 10(6) Nl ha(-1) (stem) and 1.605 x 10(6) Nl ha(-1) (leaf) for Miscanthus x giganteus and 3.507 x 10(6) Nl ha(-1) (stem) and 2.957 x 10(6) Nl ha(-1) (leaf) for Miscanthus sinensis. There was a discrepancy between the estimating dry matter yield by sampling single shoots and whole plot harvesting. This needs to be further investigated. (C) 2015 IAgrE. Published by Elsevier Ltd. All rights reserved.

引用

页码：71 / 80

页数：10

共 33 条

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