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首页> 外文期刊>Bioenergy research >Distribution of Structural Carbohydrates in Corn Plants Across the Southeastern USA
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Distribution of Structural Carbohydrates in Corn Plants Across the Southeastern USA

机译：美国东南部玉米植物中结构性碳水化合物的分布

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Quantifying lignin and carbohydrate composition of corn (Zea mays L.) is important to support the emerging cellulosic biofuels industry. Therefore, field studies with 0 or 100 % stover removal were established in Alabama and South Carolina as part of the Sun Grant Regional Partnership Corn Stover Project. In Alabama, cereal rye (Secale cereale L.) was also included as an additional experimental factor, serving as a winter cover crop. Plots were located on major soil types representative of their respective states: Compass and Decatur soils in Alabama and a Coxville/Rains-Goldsboro-Lynchburg soil association in South Carolina. Lignin and structural carbohydrate concentrations in the whole (above-ground) plant, cobs, vegetation excluding cobs above the primary ear (top), vegetation below the primary ear (bottom), and vegetation from above the primary ear including cobs (above-ear fraction) were determined using near-infrared spectroscopy (NIRS). The distribution of lignin, ash, and structural carbohydrates varied among plant fractions, but neither inclusion of a rye cover crop nor the stover harvest treatments consistently affected carbohydrate concentrations within locations. Total precipitation and average air temperature during the growing season were strongly correlated with stover composition indicating that weather conditions may have multiple effects on potential biofuel production (i.e., not only yield but also stover quality). When compared to the above-ear fractions, bottom plant partitions contained greater lignin concentrations. Holocellulose concentration was consistently greater in the above-ear fractions at all three locations. Data from this study suggests that the above-ear plant portions have the most desirable characteristics for cellulosic ethanol production via fermentation in the southeastern USA.
机译：量化玉米（Zea mays L.）的木质素和碳水化合物组成对于支持新兴的纤维素生物燃料产业至关重要。因此，作为Sun Grant地区合作伙伴玉米秸秆项目的一部分，在阿拉巴马州和南卡罗来纳州建立了去除0％或100％秸秆的田间研究。在阿拉巴马州，谷物黑麦（Secale graine L.）也作为额外的试验因子被包括在内，作为冬季覆盖作物。地块位于代表各自州的主要土壤类型上：阿拉巴马州的指南针和迪凯特土壤以及南卡罗来纳州的考克斯维尔/雨-戈尔德斯伯勒-林奇堡土壤协会。整个（地上）植物，穗轴，不包括在主穗上方的穗轴（顶部），在主穗下方的植物（底部）和从主穗上方的植物（包括穗轴）的木质素和结构碳水化合物的浓度使用近红外光谱（NIRS）测定。木质素，灰分和结构性碳水化合物的分布在植物各部分之间有所不同，但黑麦覆盖作物和秸秆收割处理的加入均不会持续影响该地区的碳水化合物浓度。生长季节的总降水量和平均气温与秸秆组成密切相关，表明天气状况可能会对潜在的生物燃料生产产生多重影响（即不仅产量而且秸秆品质）。与上耳部分相比，底部植物分区的木质素浓度更高。在所有三个位置的上耳部分中，纤维素的浓度始终较高。这项研究的数据表明，在美国东南部，上耳植物部分具有通过发酵生产纤维素乙醇的最理想特性。

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