کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7063897 | 1459812 | 2015 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Net N2O and CH4 soil fluxes of annual and perennial bioenergy crops in two central German regions
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کلمات کلیدی
CH4N2OGHGSRCGreenhouse gas emission - انتشار گازهای گلخانه ایNitrous oxide - اکسید نیتروژنoilseed rape - تجاوز به علف های هرزShort rotation coppice - جنگل کوچک کوتاهCarbon dioxide - دیاکسید کربنMaize - ذرت یا جواریSOC - سیستم روی یک تراشهMethane - متان Grass-clover - چمن شبدرSoil organic carbon - کربن آلاینده خاکCO2 - کربن دیاکسیدGreenhouse gas - گاز گلخانه ایWheat - گندم
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Net N2O and CH4 soil fluxes of annual and perennial bioenergy crops in two central German regions Net N2O and CH4 soil fluxes of annual and perennial bioenergy crops in two central German regions](/preview/png/7063897.png)
چکیده انگلیسی
The area used for bioenergy feedstock production is increasing because substitution of fossil fuels by bioenergy is promoted as an option to reduce greenhouse gas (GHG) emissions. However, agriculture itself contributes to rising atmospheric nitrous oxide (N2O) and methane (CH4) concentrations. In this study we tested whether the net exchanges of N2O and CH4 between soil and atmosphere differ between annual fertilized and perennial unfertilized bioenergy crops. We measured N2O and CH4 soil fluxes from poplar short rotation coppice (SRC), perennial grass-clover and annual bioenergy crops (silage maize, oilseed rape, winter wheat) in two central German regions for two years. In the second year after establishment, the N2O emissions were significantly lower in SRC (<0.1 kg N2O-N haâ1 yrâ1) than grassland (0.8 kg N2O-N haâ1 yrâ1) and the annual crop (winter wheat; 1.5 kg N2O-N haâ1 yrâ1) at one regional site (Reiffenhausen). However, a different trend was observed in the first year when contents of mineral nitrogen were still higher in SRC due to former cropland use. At the other regional site (Gierstädt), N2O emissions were generally low (<0.5 kg N2O-N haâ1 yrâ1) and no crop-type effects were detected. Net uptake of atmospheric CH4 varied between 0.4 and 1.2 kg CH4-C haâ1 yrâ1 with no consistent crop-type effect. The N2O emissions related to gross energy in the harvested biomass ranged from 0.07 to 6.22 kg CO2 equ GJâ1. In both regions, Gierstädt (low N2O emissions) and more distinct Reiffenhausen (medium N2O emissions), this energy yield-related N2O emission was the lowest for SRC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 81, October 2015, Pages 556-567
Journal: Biomass and Bioenergy - Volume 81, October 2015, Pages 556-567
نویسندگان
Katja Walter, Axel Don, Heinz Flessa,