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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(P<0.05),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(P<0.05),土壤有机碳与速效钾不存在显著相关性。
Six typical stands of broad-leaved mixed forest, Korean pine forest, Japanese larch forest, mixed coniferous and broad-leaved forest, red pine forest and oak forest in Liaoning Province were selected as research objects. The effects of soil organic Carbon content, 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 contents of soil organic carbon and total nitrogen in different forest types decreased gradually, and the soil layers showed significant differences. The average values of soil organic carbon in different forest types ranged from 15.11 to 47.07 g / kg; The soil total nitrogen content of different forest stands was 2.83 ~ 11.17 g / kg. The C / N of different forest stands was 9.27 ~ 28.23. The average values were Quercus variabilis forest> Korean pine forest> Pinus koraiensis forest> Japanese larch forest> Mixed forest> mixed coniferous and broad-leaved forest. The soil organic carbon storage in 0 ~ 50 cm soil layer of different stands was> 230.64 t / hm ~ 2> 210.46 t / hm ~ 2> (136.26 t / hm ~ 2)> red pine forest (122.84 t / hm ~ 2)> Korean pine forest (97.84 t / hm ~ 2)> oak forest (68.55 t / hm ~ 2) cm soil layer. There was a significant positive correlation between soil organic carbon content and soil total nitrogen, available phosphorus and available potassium (P <0.05). Soil organic carbon content in each layer varied with soil total nitrogen , Available phosphorus (P <0.05), there was no significant correlation between soil organic carbon and available potassium.