巴西圣保罗农业焚烧产生的二氧化氮排放。

NO2 emissions from agricultural burning in São Paulo, Brazil.

作者信息

Oppenheimer Clive, Tsanev Vitchko I, Allen Andrew G, McGonigle Andrew J S, Cardoso Arnaldo A, Wiatr Antony, Paterlini Willian, Dias Cristine de Mello

机构信息

Department of Geography, University of Cambridge, Downing Place, Cambridge, CB2 3EN, UK.

出版信息

Environ Sci Technol. 2004 Sep 1;38(17):4557-61. doi: 10.1021/es0496219.

DOI:10.1021/es0496219

PMID:15461163

Abstract

We report here on the application of a compact ultraviolet spectrometer to measurement of NO2 emissions from sugar cane field burns in São Paulo, Brazil. The time-resolved NO2 emission from a 10 ha plot peaked at about 240 g (NO2) s(-1), and amounted to a total yield of approximately 50 kg of N, or about 0.5 g (N) m(-2). Emission of N as NOx (i.e., NO + NO2) was estimated at 2.5 g (N) m(-2), equivalent to 30% of applied fertilizer nitrogen. The corresponding annual emission of NOx nitrogen from São Paulo State sugar cane burning was >45 Gg N. In contrast to mechanized harvesting, which does not require prior burning of the crop, manual harvesting with burning acts to recycle nitrogen into surface soils and ecosystems.

摘要

我们在此报告一种紧凑型紫外光谱仪在测量巴西圣保罗甘蔗田焚烧产生的二氧化氮排放中的应用。来自一块10公顷地块的时间分辨二氧化氮排放峰值约为240克（二氧化氮）每秒，氮的总产量约为50千克，即约0.5克（氮）每平方米。以氮氧化物（即一氧化氮+二氧化氮）形式排放的氮估计为2.5克（氮）每平方米，相当于施用肥料氮的30%。圣保罗州甘蔗焚烧产生的氮氧化物氮的相应年排放量超过45千兆克氮。与不需要预先焚烧作物的机械化收割不同，带焚烧的人工收割可将氮循环到表层土壤和生态系统中。