Combustion completeness in a rainforest clearing experiment in Manaus, Brazil
Combustion completeness in a rainforest clearing experiment in Manaus, Brazil
复制标题
巴西马瑙斯雨林砍伐实验中的燃烧完整性
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. C. Santos
中科院分区：
文献类型：
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作者：
J. Carvalho;N. Higuchi;Thaı́s Maia Araújo;J. C. Santos
本文描述了在距离巴西亚马逊州首府马瑙斯60公里的亚马逊国家研究所（INPA）热带造林实验站的森林保护区进行的森林砍伐实验的结果。1995年7月，一公顷的原始森林被砍伐，直到同年10月才被晾干。焚烧的过程类似于该地区的土著居民为耕种准备土地的过程。试验地点的新鲜生物量含量为684.8 t ha - 1，采用森林清查参数公式确定。干生物量为401.5 t ha - 1。选取10个2 × 2 m2的分区，20个胸径在10 ~ 30 cm之间的树干和71个胸径大于30 cm的树干，估算燃烧完成率为20.5%。测量了它们的燃烧消耗率。2 × 2 m2面积用于确定较小的植物成分（特征直径小于10 cm）的燃烧完整性，树干用于确定中型和大型成分（特征直径分别在10 ~ 30 cm和大于30 cm）的效率。小、中、大组分的燃烧完成度分别为88.2%、4.39%、0.43%。根据生物量含量（684.4 t ha−1）、平均生物量水分和碳含量（分别为41.6%和47.8%，后者为干燥基础）以及获得的燃烧完成度（20.5%），估计释放到大气中的平均碳、CO2和CO质量率分别为37.7、121和8.6 t ha−1。
Results are described for a forest clearing experiment conducted in the forest reserve of the Tropical Silviculture Experimental Station of the National Institute for Research in the Amazon (INPA), located 60 km from Manaus, the capital of the Brazilian state of Amazonas. An area of 1 ha of virgin forest was cut in July 1995 and left to dry until October of the same year. It was burnt using a procedure similar to that followed by native people in the region to prepare the land for cultivation. The fresh biomass content in the test location, 684.8 t ha−1, was determined using a formula with parameters from forest inventory. The dry biomass content was 401.5 t ha−1. Combustion completeness, 20.5 %, was estimated by selecting ten 2 × 2 m2 subareas, 20 trunks with diameter at breast height (DBH) between 10 and 30 cm, and 71 trunks with DBH higher than 30 cm. Their consumption rates by fire were measured. The 2 × 2 m2 areas were used to determine the combustion completeness of smaller plant components (characteristic diameters lower than 10 cm) and the trunks to determine the efficiency of the medium and large components (characteristic diameters between 10 and 30 cm and larger than 30 cm, respectively). Combustion completeness for small, medium and large components were 88.2%, 4.39%, and 0.43%, respectively. On the basis of the biomass content (684.4 t ha−1), the average biomass moisture and carbon contents (41.6% and 47.8%, respectively, the latter on dry basis), and the obtained combustion completeness (20.5%), the average carbon, CO2 and CO mass rates released to the atmosphere were estimated to be 37.7, 121, and 8.6 t ha−1, respectively.