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首页> 外文期刊>Environmental Science & Technology >The Interplay Between Bioenergy Grass Production and Water Resources in the United States of America
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The Interplay Between Bioenergy Grass Production and Water Resources in the United States of America

机译：美国生物能源草的生产与水资源之间的相互作用

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摘要

We apply a land surface model to evaluate the interplay between potential bioenergy grass (Miscanthus, Cave-in-Rock, and Alamo) production, water quantity, and nitrogen leaching (NL) in the Central and Eastern U.S. Water use intensity tends to be lower where grass yields are modeled to be high, for example in the Midwest for Miscanthus and Cave-in-Rock and the upper southeastern U.S. for Alamo. However, most of these regions are already occupied by crops and forests and substitution of these biome types for ethanol production implies trade-offs. In general, growing Miscanthus consumes more water, Alamo consumes less water, and Cave-in-Rock consumes approximately the same amount of water as existing vegetation. Bioenergy grasses can maintain high productivity over time, even in water limited regions, because their roots can grow deeper and extract the water from the deep, moist soil layers. However, this may not hold where there are frequent and intense drought events, particularly in regions with shallow soil depths. One advantage of bioenergy grasses is that they mitigate nitrogen leaching relative to row crops and herbaceous plants when grown without applying N fertilizer; and bioenergy grasses, especially Miscanthus, generally require less N fertilizer application than row crops and herbaceous plants.
机译：我们应用陆地表面模型来评估美国中部和东部潜在生物能源草（Miscanthus，Rock-in-Rock和Alamo）的产量，水量和氮淋失（NL）之间的相互影响。那里的草产量高，例如在中西部的芒斯坎索斯（Miscanthus）和岩洞（Cave-in-Rock），在美国东南部的上部则是阿拉莫（Alamo）。但是，这些地区中的大多数地区已经被农作物和森林所占据，用这些生物群落类型替代乙醇生产意味着需要权衡取舍。一般而言，生长的芒草消耗更多的水，阿拉莫消耗的水更少，岩洞消耗的水量与现有植被差不多。生物能源草可以长期保持高生产力，即使在水有限的地区，因为它们的根可以生长得更深，并且可以从潮湿的深层土壤中提取水分。但是，在频繁和强烈的干旱事件发生的地方（尤其是在土壤深度较浅的地区），这种情况可能不成立。生物能源草的优点之一是，在不施用氮肥的情况下，它们相对于大田作物和草本植物减少了氮的淋失；生物能源草，尤其是芒草通常比行作作物和草本植物需要更少的氮肥。

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  • 来源
    《Environmental Science & Technology》 |2016年第6期|3010-3019|共10页
  • 作者

    Yang Song; Matthew Cervarich; Atul K. Jain; Haroon S. Kheshgi; William Landuyt; Ximing Cai;

  • 作者单位

    Department of Atmospheric Sciences University of Illinois, Urbana, Illinois 61801, United States;

    Department of Atmospheric Sciences University of Illinois, Urbana, Illinois 61801, United States;

    Department of Atmospheric Sciences University of Illinois, Urbana, Illinois 61801, United States;

    Department of Atmospheric Sciences University of Illinois, Urbana, Illinois 61801, United States;

    ExxonMobil Research and Engineering Company, Annandale, New Jersey 08801, United States;

    Department of Civil and Environmental Engineering, University of Illinois, Urbana, Illinois 61801, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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