Evaluation of an Acacia mangium Provenance Trial after Seven Years, on the Ibi - Batéké Plateau, Democratic Republic of the Congo

Q4 Environmental Science
Étienne Yusufu Kachaka, Vincent Poirier, A. Munson, D. Khasa
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引用次数: 0

Abstract

This study reports on the evaluation of 46 Acacia mangium provenances and varieties, which were planted in 2006 on the Ibi-Batéké Plateau, Democratic Republic of the Congo. After seven years, tree height and diameter, biomass and carbon stocks of the 46 Acacia mangium provenances, together with soil carbon and nitrogen concentrations, were compared with savannah soils in which Acacia was no present. Heights and diameters of 20 to 25 trees per provenance were measured. Carbon in the biomass was determined by the direct method. In total, 25 trees were harvested and weighed for each carbon compartment (leaves, branches, litter, trunks and roots). Ninety soil samples were collected at three different depths in the provenance plots and on the savannah and analyzed for their C and N concentrations. There were differences in height and diameter growth and in accumulated carbon among trees of different origins (provenances). Finally, soil C and N differed under different provenances, and with depth. Carbon and nitrogen tended to decrease with depth. The results of the study revealed better performance for provenances originating from Papua New Guinea, Australia, Malaysia, Vietnam, China, Fiji and the Philippines.
刚果民主共和国伊比-巴塔姆科斯高原七年后对相思种源试验的评价
本研究报告了2006年在刚果民主共和国伊比-巴塔姆科斯高原种植的46个相思种源和品种的评价。7年后,对46个相思种源的树高、树径、生物量和碳储量以及土壤碳氮浓度进行了比较。每个种源测量了20 ~ 25棵树的高度和直径。采用直接法测定生物质碳含量。总共收获了25棵树,并对每个碳区(叶子、树枝、凋落物、树干和根)进行了称重。在种源样地和大草原上的3个不同深度采集了90个土壤样品,分析了它们的C和N浓度。不同来源(种源)树木的高径生长和累积碳含量存在差异。土壤C、N在不同种源、不同深度下存在差异。碳和氮随深度的增加而减少。研究结果显示,来自巴布亚新几内亚、澳大利亚、马来西亚、越南、中国、斐济和菲律宾的种源表现更好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Tropicultura
Tropicultura Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)
CiteScore
0.70
自引率
0.00%
发文量
3
审稿时长
30 weeks
期刊介绍: Tropicultura is a multi‐disciplinary journal, which publishes original articles, research and summary notes, overviews of books and essays, announcements and reports on films / audio‐visual resources concerning all fields linked to rural development, as well as sustainable management of the environment in overseas countries.
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