Carbon Flow and Budget in a Young Mature Oil Palm Agroecosystem on Deep Tropical Peat*
Carbon Flow and Budget in a Young Mature Oil Palm Agroecosystem on Deep Tropical Peat*
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深层热带泥炭上年轻成熟油棕农业生态系统的碳流量和预算*
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
R. Hatano
中科院分区：
文献类型：
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作者：
L. Melling;K. Goh;C. Beauvais;R. Hatano
砂拉越热带深层泥炭面积不断扩大，已被砍伐，正在种植油棕榈，2006年产生约10亿美元的收入，用于急需的社会经济发展。然而，人们越来越关注这一发展在温室气体排放和泥炭沼泽碳损失方面的问题。因此，进行了一项研究，调查碳流和预算在5年的油棕种植园深热带泥炭，并确定这个油棕农业生态系统是一个C汇或源。结果表明，泥炭土含有3771吨C/公顷，而其他C库加起来只占农业生态系统中总C的0.7%。棕榈的净初级生产力（NPP）为12.01吨C/公顷/年，而副产品增加土壤有机碳0.3吨C/公顷/年。测得的土壤呼吸为15.4吨碳/公顷/年，其中60%通过异养呼吸损失，导致沉降约1.6厘米/年。油棕榈既不是碳的净汇也不是碳的净源，但如果出口FFB而不利用副产品，将导致2.01吨碳/公顷/年的负碳平衡。
An increasing area of deep tropical peat in Sarawak, which has been logged-over, is being cultivated with oil palm, generating revenue of about US 1 billion in 2006 for much needed socio-economic development. However, there is growing concern with this development in regard to greenhouse gas emissions and loss of carbon from the peat swamp. A study was therefore undertaken to investigate the C flow and budget in a 5-year-old oil palm plantation on deep tropical peat, and to determine if this oil palm agroecosystem is a C sink or source. Results showed that the peat soil contained 3771 t C/ha while the other C pools together accounted for only 0.7 per cent of the total C in the agroecosystem. The net primary production (NPP) by the palms was 12.01 t C/ha/yr while by-products increased soil organic C by 0.3 t C/ha/yr. The measured soil respiration was 15.4 t C/ha/yr with 60 per cent loss through heterotrophic respiration resulting in a subsidence of about 1.6 cm/yr. The oil palm was neither a net C sink nor source but the export of FFB without by-product utilisation will cause a negative C balance of 2.01 t C/ha/yr.