WU Jiangxing,YAN Junxia,LI Hongjian.Spatial Heterogeneity of Soil Carbon and Nitrogen in Different Vegetation Restoration Types in the Guandi Mountain Area of Shanxi Province[J].Research of Soil and Water Conservation,2015,22(06):42-46,50.
关帝山不同植被恢复类型土壤碳氮的空间变异性
- Title:
- Spatial Heterogeneity of Soil Carbon and Nitrogen in Different Vegetation Restoration Types in the Guandi Mountain Area of Shanxi Province
- Keywords:
- vegetation restoration type; soil total carbon and total nitrogen; spatial heterogeneity; Guandi Mountain area; Shanxi Province
- 分类号:
- S714.5
- 摘要:
- 以关帝山2种不同植被恢复措施的林地[人工种植的华北落叶松林（LYS）和自然演替的针阔混交林（ZKHJ）]为研究对象，分析了不同植被恢复类型土壤全碳与全氮的空间变异性及其与环境因子的关系，并计算了各变量在不同置信水平与估计精度下的最佳采样数量。结果表明：① 2种植被恢复类型土壤全碳和全氮含量差异显著，ZKHJ土壤全碳和全氮含量比LYS的分别高1.00%和0.07%；ZKHJ土壤全碳和全氮的空间变异系数比LYS的分别高17.22%和7.70%。②土壤水分对2种植被类型土壤全碳和全氮空间分布的影响大于土壤温度的影响。③ 2种植被类型土壤全碳和全氮都具有较强的空间自相关性，随机因素引起的异质性较小，空间异质性的变化主要由结构因素引起的。④在同一置信水平和估计精度下，ZKHJ需要的必要采样数量比LYS的多；随着置信水平和估计精度的减低，2种植被恢复类型的合理取样数目逐渐减少。
- Abstract:
- Taking two different vegetation types [one man-planted larixprincipis-rupprechtii forest (LYS) and one natural succession coniferous and broadleaf mixed forest (ZKHJ)] as research sites, we analyzed heterogeneity of total carbon (C), total nitrogen (N) of the soil in the two forests, and influencing factors on their heterogeneity. At the same time, we calculated the minimum sampling number of all the variables in different confidence levels and under the responding estimation accuracy. The results showed that: ① significant difference of the C and N in the two vegetation restoration types existed, contents of both the C and N in ZKHJ forest was 1.00% and 0.07% higher than those in LYS forest, and spatial variation coefficients of the C and N in the ZKHJ were 17.22% and 7.70% higher than those in the LYS forest; ② impact of soil water content on spatial distribution of C and N in both forest was higher than soil temperature; ③ the C and N in the both forests showed a strong autocorrelation, and stochastic factors had little effect on spatial heterogeneity of C and N, and most changes of spatial heterogeneity resulted from structural factors; ④ at the same confidence interval and same estimation accuracy, the minimum sampling number was higher for ZKHJ forest than that for LYS forest; the sampling number of both the C and N for both the forest increased with the decrease of estimation accuracy.
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备注/Memo
收稿日期:2015-07-06;改回日期:2015-07-14。
基金项目:山西省基础研究项目（2014011032-1）；国家自然科学基金项目（41201374，41130528）
作者简介:武江星(1988-),女,山西省文水县人,硕士研究生,研究方向为生态系统碳循环。E-mail:hongli@sxu.edu.cn
通讯作者:严俊霞(1976-),女,山西省洪洞县人,博士,讲师,研究方向为生态系统碳循环。E-mail:yjx422@sxu.edu.cn