不同林龄云南松林土壤有机碳和全氮积累特征

应用生态学报

不同林龄云南松林土壤有机碳和全氮积累特征

苗娟^1,4,周传艳^2,5,李世杰³,闫俊华^1**

(¹中国科学院华南植物园, 广州 510650; ²贵州省山地资源研究所, 贵阳 550001; ^3贵州省林业调查规划院, 贵阳 550003; ⁴中国科学院大学, 北京 100049; ⁵华南理工大学环境与能源学院, 广州 510640）

出版日期:2014-03-18 发布日期:2014-03-18

Accumulation of soil organic carbon and total nitrogen in Pinus yunnanensis forests at different age stages.

MIAO Juan^1,4, ZHOU Chuan-yan^2,5, LI Shi-jie³, YAN Jun-hua^1

(¹South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; ²Institute of Mountain Resources, Guizhou Academy of Sciences, Guiyang 550001, China; ³Guizhou Forest Inventory and Planning Institute, Guiyang 550003, China; ⁴University of Chinese Academy of Sciences, Beijing 100049, China; ⁵College of Environment and Energy, South China University of Technology, Guangzhou 510640, China)

Online:2014-03-18 Published:2014-03-18

摘要/Abstract

摘要：

以贵州省盘县3种林龄(19、28和45年生)云南松林为对象,研究了林地土壤有机碳和全氮含量的垂直分布、积累特征及其与土壤容重的关系.结果表明: 不同林龄云南松林土壤剖面的有机碳和全氮含量变化规律一致,表层呈富集现象,随着土层的加深而逐渐减少.随着林龄的增加,林地土壤的有机碳和全氮储量增加,19、28和45年生林地土壤有机碳储量分别为96.24、121.65和148.13 t·hm^-2,全氮储量分别为10.76、12.96和13.08 t·hm^-2.土壤有机碳与全氮含量呈极显著正相关,二者均与土壤容重呈极显著负相关.不同生长阶段林地土壤有机碳和全氮的积累速率有所差异,其中19～28年生林地的土壤有机碳和全氮含量积累速率高于28～45年生林地.

Abstract: Taking three Pinus yunnanensis forests at different ages (19, 28 and 45 a) in Panxian County of Guizhou Province as test objects, we investigated vertical distributions and accumulation rates of soil organic carbon (SOC) and total nitrogen (TN), as well as their relationships with soil bulk density. For the three forests at different age stages, SOC and TN changed consistently along the soil profile, dec〖JP〗lining with the soil depth. Both SOC and TN storage increased with the forest age. The SOC and TN storage amounts were 96.24, 121.65 and 148.13 t·hm^-2, and 10.76, 12.96 and 13.08 t·hm^-2 for the forest stands with 19 a, 28 a and 45 a, respectively. SOC had a significant positive correlation with soil TN, while both of them had a significant negative relationship with the soil bulk density. The accumulation rates of both SOC and TN storage at different growth periods were different, and the rate in the period from age 19 to 28 was higher than in the period from age 28 to 45.

苗娟1,4,周传艳2,5,李世杰3,闫俊华1**. 不同林龄云南松林土壤有机碳和全氮积累特征[J]. 应用生态学报.

MIAO Juan1,4, ZHOU Chuan-yan2,5, LI Shi-jie3, YAN Jun-hua1. Accumulation of soil organic carbon and total nitrogen in Pinus yunnanensis forests at different age stages.[J]. Chinese Journal of Applied Ecology.