若尔盖高原退化湿地土壤有机碳储量

发布时间：2018-03-19 18:06

本文选题：退化湿地　切入点：土壤有机碳储量　出处：《水土保持研究》2017年05期 　论文类型：期刊论文

【摘要】：为了定量评价若尔盖高原泥炭沼泽湿地退化的碳储存潜力,研究通过土壤剖面法,收集了3个样点的泥炭沼泽湿地土壤样品(原始泥炭地0—200cm、中度退化沼泽湿地0—100cm和重度退化泥炭地0—100cm)。研究表明:(1)中度退化沼泽湿地(1.11±0.18g/cm~3)和重度退化泥炭地(0.72±0.04g/cm~3)土壤容重平均值较原始泥炭地增加了251.8%和129.7%;中度退化沼泽湿地(46.18±6.61g/kg)和重度退化泥炭地(87.37±6.36g/kg)土壤有机碳含量平均值较原始泥炭地降低了74.2%和51.1%。(2)土层深度为0—100cm时,原始泥炭地土壤有机碳储量较中度退化沼泽湿地(384.73±95.57t/hm~2)显著高了47.0%,而与重度退化泥炭地(518.39±33.07t/hm~2)土壤有机碳储量无显著差异;当原始泥炭地有机层增加到0—200cm后,中度退化沼泽湿地和重度退化泥炭地土壤有机碳储量较原始泥炭地(1 088.17±172.84t/hm~2)降低了64.6%和52.4%,退化湿地土壤有机碳储量的降低可能主要是土壤有机碳含量降低的原因。尽管退化湿地土壤有机碳储量下降,但仍是中国(102.89t/hm~2)和全球(116.56t/hm~2)陆地土壤有机碳储量的3~5倍,该研究可为保护与恢复若尔盖高原湿地提供科学依据。
[Abstract]:In order to quantitatively evaluate the carbon storage potential of peat swamps degraded in the Zoige Plateau, the soil profile method was used to study the potential of carbon storage. The soil bulk density of three sample sites (primitive peat land 0-200 cm, moderately degraded marsh wetland 0-100 cm and severe degraded marsh land 0-100 cm) were collected. The results show that the soil bulk density of moderately degraded marsh wetland is 1.11 卤0.18 g / cm ~ (-3) and that of severe degraded marsh is 0.72 卤0.04 g / cm ~ (-3). The average value of soil organic carbon increased by 251.8% and 129.7 in comparison with the original peat land, and the average soil organic carbon content in moderately degraded marsh wetland (46.18 卤6.61 g / kg) and heavily degraded peat land (87.37 卤6.36 g / kg) decreased by 74.2% and 51.1g / kg compared with the original peat land. The soil organic carbon storage in the original peat land was significantly higher than that in the moderately degraded marsh wetland (384.73 卤95.57 t / hmm-2), but not significantly different from that in the heavily degraded peat land (518.39 卤33.07 t / hmm-2), when the organic layer of the original peat land increased to 0-200 cm, The soil organic carbon storage of moderately degraded marsh wetland and severe degraded peat land decreased by 64.6% and 52.4 compared with the original peat land (10088.17 卤172.84 t / hm-2). The decrease of soil organic carbon storage in degraded wetland may be the main reason for the decrease of soil organic carbon content. The soil organic carbon reserves of the degraded wetland decreased, But it is still three or five times the amount of soil organic carbon stored in China (102.89 t / hm ~ (2)) and global 116.56 t / hm ~ (2)). This study can provide scientific basis for the protection and restoration of Ruoerge plateau wetland.
【作者单位】：中国林业科学研究院湿地研究所湿地生态功能与恢复北京市重点实验室;湖北省林业科学研究院;
【基金】：中国林业科学研究院林业新技术研究所基本科研业务费专项(CAFINT2014K06) 中国清洁发展机制基金赠款项目(2012076)
【分类号】：S153.62

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