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Nitrous oxide emissions from native oaxacan maize and mucilage effects on US maize soil.

机译：瓦哈卡州天然玉米排放的一氧化二氮以及对美国玉米土壤的黏液作用。

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摘要

Native maize and US Z37 hybrid maize were grown under greenhouse conditions for nine weeks and measured for N2O and CO2 emissions weekly. Native maize cultivars showed increased nitrous oxide emissions compared to US maize two weeks after a fertilizer application at the equivalent of 30 kg/ha. These results suggest that native maize is changing the rhizosphere and causing the rates of nitrification or denitrification to change in response to fertilizer treatment. Mucilage produced by maize cultivars was added to soils of native, US, and control soils to test the effects of mucilage on N2O and CO2 emissions, nitrate, nitrite, and ammonium. Mucilage was found to increase carbon dioxide emissions from soil. This suggests that native maize mucilage increases microbial activity in these soils. Also, the US soil showed a peak of nitrous oxide emissions when mucilage was added suggesting maize mucilage leads to specific microbial activity in the soil increasing rates of nitrification, denitrification, or a combination of these processes. These results support the idea that these native maize cultivars are using this mucilage to change rates of nitrification so that more nitrogen is available for growth.
机译：本地玉米和美国Z37杂交玉米在温室条件下生长9周，每周测量N2O和CO2排放量。施肥后两周，当地玉米品种的一氧化二氮排放量比美国玉米增加了，当量为30公斤/公顷。这些结果表明，天然玉米正在改变根际并导致硝化或反硝化速率随肥料处理而改变。将玉米品种产生的粘液添加到美国本土和对照土壤中，以测试粘液对N2O和CO2排放，硝酸盐，亚硝酸盐和铵的影响。发现粘液会增加土壤中的二氧化碳排放量。这表明天然玉米粘液增加了这些土壤中的微生物活性。同样，当添加粘液时，美国土壤显示出一氧化二氮排放的峰值，这表明玉米粘液导致土壤中特定的微生物活性，从而增加硝化作用，反硝化作用或这些过程的组合。这些结果支持这样的想法，即这些本地玉米品种正在使用这种粘液来改变硝化速率，从而使更多的氮可用于生长。

著录项

  • 作者

    Singh, Priyashiela.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Agriculture Agronomy.;Agriculture Horticulture.;Biology Botany.
  • 学位 M.S.
  • 年度 2009
  • 页码 69 p.
  • 总页数 69
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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