• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>other >A Comparison of Corn (Zea mays L.) Residue and Its Biochar on Soil C and Plant Growth
【2h】

A Comparison of Corn (Zea mays L.) Residue and Its Biochar on Soil C and Plant Growth

机译：玉米（Zea mays L.）残留及其生物炭对土壤碳和植物生长的比较

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to properly determine the value of charring crop residues, the C use efficiency and effects on crop performance of biochar needs to be compared to the un-charred crop residues. In this study we compared the addition of corn stalks to soil, with equivalent additions of charred (300 °C and 500 °C) corn residues. Two experiments were conducted: a long term laboratory mineralization, and a growth chamber trial with proso millet plants. In the laboratory, we measured soil mineral N dynamics, C use efficiency, and soil organic matter (SOM) chemical changes via infrared spectroscopy. The 300 °C biochar decreased plant biomass relative to a nothing added control. The 500°C biochar had little to no effect on plant biomass. With incubation we measured lower soil NO3 content in the corn stalk treatment than in the biochar-amended soils, suggesting that the millet growth reduction in the stalk treatment was mainly driven by N limitation, whereas other factors contributed to the biomass yield reductions in the biochar treatments. Corn stalks had a C sequestration use efficiency of up to 0.26, but charring enhanced C sequestration to values that ranged from 0.64 to 1.0. Infrared spectroscopy of the soils as they mineralized showed that absorbance at 3400, 2925-2850, 1737 cm-1, and 1656 cm-1 decreased during the incubation and can be regarded as labile SOM, corn residue, or biochar bands. Absorbances near 1600, 1500-1420, and 1345 cm-1 represented the more refractory SOM moieties. Our results show that adding crop residue biochar to soil is a sound C sequestration technology compared to letting the crop residues decompose in the field. This is because the resistance to decomposition of the chars after soil amendment offsets any C losses during charring of the crop residues.
机译：为了正确确定炭化残渣的价值，需要将碳的利用效率和对生物炭的作物性能的影响与未炭化的残渣进行比较。在这项研究中，我们比较了玉米秸秆在土壤中的添加量与烧焦的（300°C和500°C）玉米残留量的添加量。进行了两个实验：长期的实验室矿化和对谷类植物的生长室试验。在实验室中，我们通过红外光谱法测量了土壤矿物氮的动态，碳的利用效率和土壤有机质（SOM）的化学变化。相对于无添加对照，300℃生物炭减少了植物生物量。 500°C的生物炭对植物生物量几乎没有影响。通过孵育，我们测得玉米秸秆处理中的土壤NO3含量低于生物炭改良过的土壤，这表明秸秆处理中小米生长的降低主要是受氮限制的驱动，而其他因素导致生物炭中生物量的减少治疗。玉米秸秆的固碳利用效率最高为0.26，但炭化可将固碳提高到0.64至1.0范围内的值。矿化土壤的红外光谱显示，在培养过程中，在3400、2925-2850、1737 cm -1 和1656 cm -1 处的吸光度降低，可以认为是作为不稳定的SOM，玉米残留物或生物炭带。 1600、1500-1420和1345 cm -1 附近的吸光度代表更难处理的SOM部分。我们的结果表明，与在田间分解农作物残渣相比，向土壤中添加农作物残渣生物炭是一种可靠的固碳技术。这是因为土壤改良后炭的分解抵抗力抵消了农作物残渣炭化过程中的任何碳损失。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号