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首页> 外文期刊>Bioenergy research >The Impact of Corn Residue Removal on Soil Aggregates and Particulate Organic Matter
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The Impact of Corn Residue Removal on Soil Aggregates and Particulate Organic Matter

机译：去除玉米残渣对土壤团聚体和颗粒有机物的影响

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摘要

Removal of corn (Zea mays L.) stover as a biofuel feedstock is being considered. It is important to understand the implications of this practice when establishing removal guidelines to ensure the long-term sustainability of both the biofuel industry and soil health. Aboveground and belowground plant residues are the soil’s main sources of organic materials that bind soil particles together into aggregates and increase soil carbon (C) storage. Serving to stabilize soil particles, soil organic matter (SOM) assists in supplying plant available nutrients, increases water holding capacity, and helps reduce soil erosion. Data obtained from three Corn Stover Regional Partnership sites (Brookings, SD; Morris, MN; and Ithaca, NE) were utilized to evaluate the impact of removing corn stover on soil physical properties, including dry aggregate size distribution (DASD), erodible fraction (EF), and SOM components. Each site consisted of a combination of three residue removal rates (low—removal of grain only, intermediate—approximately 50 % residue removal, and high—maximum amount of residue removal). Results showed that the distribution of soil aggregates was less favorable for all three locations when residue was removed without the addition of other sources of organic matter such as cover crops. Additionally, we found that when residue was removed and the soil surface was less protected, there was an increase in the EF at all three research sites. There was a reduction in the EF for both the Brookings, SD, and Ithaca, NE sites when cover crops were incorporated or additional nitrogen (N) was added to the system. Amounts of SOM, fine particulate organic matter (fPOM), and total particulate organic matter (tPOM) consistently decreased as greater amounts of residue were removed from the soil surface. Across these three locations, the removal of crop residue from the soil surface had a negative impact on measured soil physical properties. The addition of a cover crop or additional N helped reduce this impact as measured through aggregate size distribution and EF and SOM components.
机译：正在考虑去除作为生物燃料原料的玉米秸秆（Zea mays L.）。重要的是，在建立清除指南时应了解这种做法的含义，以确保生物燃料行业和土壤健康的长期可持续性。地上和地下的植物残渣是土壤中有机物质的主要来源，有机物质将土壤颗粒结合在一起形成聚集体，并增加了土壤碳（C）的存储量。为了稳定土壤颗粒，土壤有机质（SOM）有助于提供植物可用的养分，增加保水能力，并有助于减少土壤侵蚀。从三个玉米斯托夫地区合作伙伴站点（南卡罗来纳州布鲁克林；明尼苏达州莫里斯和内布拉斯加州伊萨卡）获得的数据用于评估去除玉米秸秆对土壤物理特性的影响，包括干骨料粒度分布（DASD），易蚀部分（ EF）和SOM组件。每个位点由三个残留物去除率（低-仅去除谷物，中度-大约50％残留物去除和高-最大残留物去除率）的组合组成。结果表明，在去除残留物而未添加其他有机物来源（如覆盖作物）的情况下，这三个位置的土壤聚集体分布都不利。此外，我们发现当去除残留物并保护土壤表面时，三个研究地点的EF均增加。当覆盖农作物或向系统中添加额外的氮（N）时，SD的布鲁金斯州和伊萨卡州的NE站点的EF均降低。随着土壤中残留物的清除量增加，SOM，细颗粒有机物（fPOM）和总颗粒有机物（tPOM）的数量持续减少。在这三个位置上，从土壤表面清除农作物残留物会对测得的土壤物理性质产生负面影响。通过总大小分布以及EF和SOM成分衡量，添加覆盖作物或额外的N有助于减少这种影响。

著录项

  • 来源
    《Bioenergy research》 |2014年第2期|559-567|共9页
  • 作者

    Shannon L. Osborne; Jane M. F. Johnson; Virginia L. Jin; Amber L. Hammerbeck; Gary E. Varvel; Tom E. Schumacher;

  • 作者单位

    1.USDA—Agricultural Research Service—North Central Agricultural Research Laboratory 2923 Medary Ave Brookings SD 57006 USA;

    2.USDA—Agricultural Research Service—North Central Soil Conservation Research Laboratory 803 Iowa Ave Morris MN 56267 USA;

    3.USDA—Agricultural Research Service—Agroecosystems Management Research Unit 117 Keim Hall Lincoln NE 68583 USA;

    4.Plant Science Department South Dakota State University Brookings SD 57007 USA;

    3.USDA—Agricultural Research Service—Agroecosystems Management Research Unit 117 Keim Hall Lincoln NE 68583 USA;

    4.Plant Science Department South Dakota State University Brookings SD 57007 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bioenergy Second generation feedstock Sustainable Renewable energy Soil health;

    机译：生物能源第二代原料可持续可再生能源土壤健康;

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