کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7063707 1459810 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coupling effects of water availability and pH on switchgrass and the optimization of these variables for switchgrass productivity determined by response surface methodology
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Coupling effects of water availability and pH on switchgrass and the optimization of these variables for switchgrass productivity determined by response surface methodology
چکیده انگلیسی
Perennial grasses can be planted in marginal lands, and the perennial grass species switchgrass (Panicum virgatum) has emerged as an ideal candidate for bioethanol production. To choose the optimal soil water content and pH value for bioethanol production using switchgrass, a greenhouse experiment was conducted with five pH levels (4.9, 6.3, 7.0, 7.7, and 9.1) and five soil water contents (8%, 16%, 20%, 24%, and 32%). The coupling effects of water and pH stresses on switchgrass were investigated by evaluating fresh weight and dry weight, biomass composition (acid detergent fiber, neutral detergent fiber, acid detergent lignin, cellulose, hemi-cellulose, and lignin) and physiological response (soluble sugar content, proline content, MDA content, chlorophyll content and relative conductivity) in Alamo switchgrass. The results demonstrate a significant and positive correlation between the cellulose and acid detergent fiber content in switchgrass biomass (R2 = 0.959). The results of the variance analyses demonstrate that water and pH stress yielded a coupling effect on switchgrass, and this finding was significant for fresh weight and neutral detergent fiber and proline content. By response surface methodology, the optimal combination of soil water content (SWC) and pH was SWC = 31.968%-44.424% and pH = 6.328-8.123. These results provide basic evidence for planting switchgrass in marginal lands.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 83, December 2015, Pages 393-402
نویسندگان
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