کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2414781 1103929 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Carbon exchange by establishing biofuel crops in Central Illinois
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Carbon exchange by establishing biofuel crops in Central Illinois
چکیده انگلیسی

Perennial grass biofuels may contribute to long-term carbon sequestration in soils, thereby providing a broad range of environmental benefits. To quantify those benefits, the carbon balance was investigated over three perennial grass biofuel crops – miscanthus (Miscanthus × giganteus), switchgrass (Panicum virgatum) and a mixture of native prairie plants – and a row crop control (maize–maize–soy) in Central Illinois, USA, during the establishment phase of the perennial grasses (2008–2011). The eddy covariance technique was used to calculate fluxes of carbon dioxide and energy balance components, such as latent and sensible heat fluxes. Whereas maize attained the highest maximal carbon uptake rates, the perennial grasses had significantly extended growing seasons, such that their total carbon uptake rivaled that of corn in the second growing season and greatly exceeded that of soy in the third growing season. To account for the removal of carbon through harvest, net ecosystem exchange of carbon (NEE) was combined with estimates of yields, resulting in the net ecosystem carbon balance (NECB). After 2.5 years, NECB for the maize/soybean plot was positive (a source of carbon), while the grasses were a sink of carbon. Continuous measurements over the next years are required in order to confirm whether miscanthus, switchgrass and prairie can sustain a long-term sink of carbon if managed for biofuels, i.e., if harvested annually.


► Carbon balance for the first 2.5 years of establishment of perennial grass biofuel crops reveals net uptake of carbon.
► Miscanthus, switchgrass and native prairie species were a sink of carbon after taking into account harvested biomass.
► Perennial grass bioenergy crops can provide environmental benefits through their potential to sequester carbon in roots and soil.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 144, Issue 1, November 2011, Pages 319–329
نویسندگان
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