کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7063411 | 1459806 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Compositional differences among upland and lowland switchgrass ecotypes grown as a bioenergy feedstock crop
ترجمه فارسی عنوان
تفاوت ترکیب در بین اکوتایپ های کوهستانی و اکوادوری که به عنوان یک محصول زیست انرژی مورد استفاده قرار می گیرند
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کلمات کلیدی
ADFADLSwitchgrassTNCNDFacid detergent fiber - الیاف پاک کننده اسیدEcotypes - اکوتایپ هاFeedstock composition - ترکیب مواد اولیهBiomass yield - عملکرد زیست تودهneutral detergent fiber - فیبر مواد شوینده خنثیacid detergent lignin - لیگنین پاک کننده اسیدdry matter - ماده خشکHarvest management - مدیریت برداشتNitrogen - نیتروژنtotal nonstructural carbohydrates - کل کربوهیدرات غیر ساختاریBiomass quality - کیفیت زیست توده
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Feedstock quality mainly depends upon the biomass composition and bioenergy conversion system being used. Higher cellulose and hemicellulose concentrations are desirable for biochemical conversion, whereas higher lignin is favored for thermochemical conversion. The efficiency of these conversion systems is influenced by the presence of high nitrogen and ash concentrations. Switchgrass (Panicum virgatum L.) varieties are classified into two ecotypes based on their habitat preferences, i.e., upland and lowland. The objectives of this study were to quantify the chemical composition of switchgrass varieties as influenced by harvest management, and to determine if ecotypic differences exist among them. A field study was conducted near Ames, IA during 2012 and 2013. Upland ('Cave-in-Rock', 'Trailblazer' and 'Blackwell') and lowland switchgrass varieties ('Kanlow' and 'Alamo') were grown in a randomized block design with six replications. Six biomass harvests were collected at approximately 2-week intervals each year. In both years, delaying harvest increased cellulose, hemicellulose and lignin concentrations while decreasing nitrogen and ash concentrations in all varieties. On average, Kanlow had the highest cellulose and hemicellulose concentration (354 and 321 g kgâ1 DM respectively), and Cave-in-Rock had the highest lignin concentration (33 g kgâ1 DM). The lowest nitrogen and ash concentrations were observed in Kanlow (14 and 95 g kgâ1 DM respectively). In general, our results indicate that delaying harvest until fall improves feedstock quality, and ecotypic differences do exist between varieties for important feedstock quality traits. These findings also demonstrate potential for developing improved switchgrass cultivars as bioenergy feedstock by intermating lowland and upland ecotypes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 87, April 2016, Pages 169-177
Journal: Biomass and Bioenergy - Volume 87, April 2016, Pages 169-177
نویسندگان
Muhammad Aurangzaib, Kenneth J. Moore, Sotirios V. Archontoulis, Emily A. Heaton, Andrew W. Lenssen, Shuizhang Fei,