辽宁仙人洞典型林分森林土壤碳氮分布特征

发布时间：2018-03-13 19:23

本文选题：土壤有机碳　切入点：有机碳储量　出处：《吉林农业大学学报》2017年02期 　论文类型：期刊论文

【摘要】：以辽宁省仙人洞自然保护区内阔叶混交林、红松林、日本落叶松林、针阔混交林、赤松林以及栎类林6种典型林分为研究对象,分析了不同林分类型下土壤有机碳的含量、有机碳储量、全氮含量、碳氮比(C/N)及有机碳含量与全氮、速效磷、速效钾的相关关系。结果表明:随着土壤剖面深度的增加,不同林分的土壤有机碳、全氮含量逐渐降低,且不同土壤层次间呈现出显著性差异;不同林分土壤有机碳含量平均值为15.11~47.07 g/kg;不同林分土壤全氮含量为2.83~11.17 g/kg;不同林分的C/N为9.27~28.23,平均值大小为栎类林红松林赤松林日本落叶松阔叶混交林针阔混交林;不同林分0~50 cm土层的土壤有机碳储量大小为针阔混交林(230.64 t/hm~2)日本落叶松(210.46 t/hm~2)阔叶混交林(136.26 t/hm~2)赤松林(122.84 t/hm~2)红松林(97.84 t/hm~2)栎类林(68.55 t/hm~2);在0~10 cm土层,各个林分土壤有机碳含量与土壤全氮、速效磷、速效钾呈显著正相关(P0.05),在10~20 cm土层,各个林分土壤有机碳含量与土壤全氮、速效磷呈显著正相关(P0.05),土壤有机碳与速效钾不存在显著相关性。
[Abstract]:Six typical forest types, including broad-leaved mixed forest, Korean pine forest, Japanese larch forest, coniferous and broad-leaved mixed forest, red pine forest and oak forest in Xianrendong Nature Reserve of Liaoning Province, were divided into six types. The correlation of organic carbon storage, total nitrogen content, C / N ratio and organic carbon content with total nitrogen, available phosphorus and available potassium. The results showed that with the increase of soil profile depth, the total nitrogen content of different stand soil organic carbon decreased gradually. There were significant differences among different soil layers. The average soil organic carbon content of different stands was 15.11 ~ 47.07 g / kg; the total nitrogen content of different stands was 2.83 ~ 11.17 g 路kg ~ (-1); the C / N of different stands was 9.27 ~ 28.23, the average value was that of Pinus koraiensis forest, Korean larch broadleaf mixed forest and coniferous broadleaved mixed forest. The soil organic carbon reserves of different stands in 50 cm soil layer are as follows: coniferous and broad-leaved mixed forest (230.64 t / hm ~ (2)) Larix gmelini 210.46 t / hm ~ (2)) broadleaved mixed forest (136.26 t / hm ~ (2)) Korean pine forest (122.84 t / hm ~ (2)) Quercus koraiensis forest 97. 84 t / hm ~ (2) Quercus); in 0 ~ 10 cm soil layer, 68.55 t 路hm ~ (2) 路m ~ (2); There was significant positive correlation between soil organic carbon content and soil total nitrogen, available phosphorus and available potassium in each stand, and the soil organic carbon content and soil total nitrogen were significantly correlated in 1020 cm soil layer. There was a significant positive correlation between available phosphorus and available potassium, but there was no significant correlation between soil organic carbon and available potassium.
【作者单位】：北京林业大学林学院;辽宁省林业科学研究院;
【基金】：国家科技基础性工作专项(2014FY120700)
【分类号】：S714.2

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