神农架不同海拔巴山冷杉林土壤活性有机碳特征

发布时间：2018-06-07 04:40

本文选题：巴山冷杉林 + 微生物量碳　；参考：《西南林业大学学报》2017年01期

【摘要】：选取土壤微生物量碳(MBC)和水溶性有机碳(WSOC)2个活性有机碳组分指标,研究神农架巴山冷杉林土壤活性有机碳组分含量的海拔梯度分布特征及其影响因子。结果表明:土壤微生物量碳和水溶性有机碳均随着海拔的升高而增加,随着土层的加深而降低。其中土壤微生物量碳在海拔2 200~3 000 m为0.30~1 22 g/kg,占总有机碳的1.05%~2.09%;水溶性有机碳在不同海拔范围为0.16~0.69 g/kg,占总有机碳的0.57%~1.20%。2个土壤有机碳活性组分均与土壤总有机碳含量、土壤全N含量和土壤湿度呈极显著正相关(P0.01),而与土壤温度呈极显著负相关(P0.01),土壤总有机碳含量是影响土壤活性碳组分含量的决定因素。2个活性有机碳组分之间也呈极显著正相关(P0.01)。
[Abstract]:Soil microbial biomass carbon (MBC) and water-soluble organic carbon (WSOC) were selected to study the distribution characteristics of soil active organic carbon (AOC) and its influencing factors in Abies fir forest in Shannongjia Mountain. The results showed that both soil microbial biomass carbon and water-soluble organic carbon increased with elevation and decreased with the deepening of soil layer. Soil microbial biomass carbon was 0.30 ~ 1.22 g / kg at 2 200 ~ 3 000 m, which accounted for 1.05% of total organic carbon, and water-soluble organic carbon was 0.16 ~ 0.69 g 路kg ~ (-1) 路kg ~ (-1), 0.57 ~ 1.20.2% of total organic carbon, all of which were related to soil total organic carbon content. Soil total N content and soil moisture were positively correlated with soil moisture, but negatively correlated with soil temperature. Soil total organic carbon content was the determinant factor of soil active carbon content, and the two active organic carbon components were also between two active organic carbon components. There was a very significant positive correlation (P 0.01).
【作者单位】：湖北省林业科学研究院;中国林业科学研究院森林生态环境与保护研究所;
【基金】：国家科技基础性工作专项(2014FY120700)资助国家林业局生态站监测运行补助项目(2016-LYPT-DW-066)资助
【分类号】：S714.2

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