Nitrous oxide emissions respond differently to mineral and organic nitrogen sources in contrasting soil types.
Nitrous oxide emissions respond differently to mineral and organic nitrogen sources in contrasting soil types.
复制标题
DOI：
10.2134/jeq2011.0261
复制
发表时间：
2012-03
影响因子：
2.4
通讯作者：
D. Pelster;M. Chantigny;P. Rochette;D. Angers;Christine Rieux;A. Vanasse
中科院分区：
文献类型：
--
作者：
D. Pelster;M. Chantigny;P. Rochette;D. Angers;Christine Rieux;A. Vanasse
使用各种动物粪便进行氮（N）施肥通常被视为矿物氮肥的可行替代品。然而，修正类型对NO产生的影响可能会有所不同。在这项研究中，NO的排放量进行了为期2年的测量，在两种土壤类型的质地和碳（C）含量的对比，在凉爽，潮湿的气候。处理包括无氮对照、硝酸铵钙、家禽粪便、液体牛粪或液体猪粪。氮源的表面施加，并立即纳入90公斤氮公顷播种前的春小麦（L.）。粉质粘土的累积NO-N排放量范围为2.2至8.3公斤公顷年，在控制略低于施肥地块（= 0.067）。2年的平均NO排放因子范围从2.0%至4.4%的添加N，N源之间没有差异。桑迪壤土的NO排放量为0.3 ~ 2.2 kg NO-N/ha/a，有机氮源的排放量高于无机氮源（= 0.015），家禽粪便的排放量最大（< 0.001）。用家禽粪便改良的地块的NO排放因子为1.8%，是其他处理（0.3-0.9%）的两倍多，可能是因为其高C含量。在粉质粘土，产量为基础的NO排放量（克NO-N公斤粮食产量N）处理之间是相似的，而在桑迪壤土，他们是最大的家禽粪便修正时。我们的研究结果表明，与无机氮源相比，有机肥的施用只增加了低碳含量土壤中的NO通量。
The use of various animal manures for nitrogen (N) fertilization is often viewed as a viable replacement for mineral N fertilizers. However, the impacts of amendment type on NO production may vary. In this study, NO emissions were measured for 2 yr on two soil types with contrasting texture and carbon (C) content under a cool, humid climate. Treatments consisted of a no-N control, calcium ammonium nitrate, poultry manure, liquid cattle manure, or liquid swine manure. The N sources were surface applied and immediately incorporated at 90 kg N ha before seeding of spring wheat ( L.). Cumulative NO-N emissions from the silty clay ranged from 2.2 to 8.3 kg ha yr and were slightly lower in the control than in the fertilized plots ( = 0.067). The 2-yr mean NO emission factors ranged from 2.0 to 4.4% of added N, with no difference among N sources. Emissions of NO from the sandy loam soil ranged from 0.3 to 2.2 kg NO-N ha yr, with higher emissions with organic than mineral N sources ( = 0.015) and the greatest emissions with poultry manure ( < 0.001). The NO emission factor from plots amended with poultry manure was 1.8%, more than double that of the other treatments (0.3-0.9%), likely because of its high C content. On the silty clay, the yield-based NO emissions (g NO-N kg grain yield N) were similar between treatments, whereas on the sandy loam, they were greatest when amended with poultry manure. Our findings suggest that, compared with mineral N sources, manure application only increases soil NO flux in soils with low C content.