浙江乌岩岭7种林分土壤碳密度及碳氮比分布特征

权伟; 郑方东; 戎建涛

doi:10.3969/j.issn.1000-2006.201803039

权伟,郑方东,戎建涛

南京林业大学学报（自然科学版） ›› 2019, Vol. 43 ›› Issue (01) : 175-180.

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南京林业大学学报（自然科学版） ›› 2019, Vol. 43 ›› Issue (01) : 175-180. DOI: 10.3969/j.issn.1000-2006.201803039

研究简报

浙江乌岩岭7种林分土壤碳密度及碳氮比分布特征

权伟¹,郑方东²,戎建涛¹

作者信息 +

Soil carbon density and C/N distribution of seven forest types in Wuyanling Nature Reserve, Zhejiang Province

QUAN Wei¹, ZHENG Fangdong², RONG Jiantao¹

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文章历史 +

摘要

【目的】探究浙江乌岩岭自然保护区7种林分(松林、杉木林、柳杉林、阔叶林、混交林、竹林、茶园)土壤的总碳(TC)密度、有机碳(SOC)密度及土壤碳氮比(C/N)的分布特征,为提高土壤碳库管理水平提供参考。【方法】用TOC-L_CPH总有机碳分析仪测定了该区7种林分土壤TC与SOC含量,核算相应的土壤碳密度及C/N,并分析土壤TC密度、SOC密度及C/N与部分土壤理化参数的关系。【结果】乌岩岭自然保护区各林分0～40 cm土层SOC密度为84.53～183.26 t/hm²,平均值为118.06 t/hm²,以杉木林最高。除杉木林0～10 cm土层C/N高于25外,其余土层及其他林分土壤C/N为8.32～21.88。乌岩岭自然保护区各土层TC密度、SOC密度及C/N在7种林分间均无显著性差异(P>0.05)。土壤TC密度及C/N都呈现出随土层深度增加而减少的规律,具有明显的表聚特征,不同土层间差异显著(P<0.05)。土壤TC密度、SOC密度与土壤速效钾(AK)含量之间存在显著正相关(P<0.05),土壤C/N与土壤有效钾(AK)含量间存在极显著正相关(P<0.01)。【结论】乌岩岭自然保护区土壤AK含量可作为土壤TC密度、SOC密度及C/N共同的重要指示因子。

Abstract

【Objective】The present study investigated the soil total carbon(TC), soil organic carbon(SOC), soil C/N and their distribution characteristics among seven forest types(pine forest, Chinese fir forest, Cryptomeria fortunei forest, broad-leaved forest, mixed forest, bamboo forest and tea plantation)to improve the management of soil carbon pools in Wuyanling Nature Reserve, Zhejiang Province, China.【Method】The TC content and SOC content of seven forest types were determined by Shimadzu TOC-L_CPH total organic carbon analyzer, the corresponding soil carbon densities and C/N were calculated, the relationships of TC density, SOC density, C/N with soil physical and chemical parameters were analyzed. 【Result】 The SOC density of the 0-40 cm layers in Wuyanling Nature Reserve were between 84.53-183.26 t/hm², with an average value of 118.06 t/hm², and the highest SOC density was found in the Chinese fir forest. The C/N for the soil layers and forest types ranged between 8.32-21.88, except for the C/N in the layer 0-10 cm in the Chinese fir forest, which was higher than 25. The soil TC density, SOC density, and C/N among seven forest types in Wuyanling Nature Reserve showed no significant difference(P > 0.05). The soil TC density and C/N decreased with increasing of soil depth, showed obvious characteristics of surface aggregation, and there was a significant difference among different soil layers(P < 0.05). There was a significant positive correlation of TC density, SOC density with soil available potassium(AK)content(P < 0.05), and showed an extremely significant positive correlation of C/N with soil AK content(P < 0.01)were observed. 【Conclusion】 Soil AK content can be used as a common significant indicator for TC density, SOC density, and C/N in Wuyanling Nature Reserve.

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权伟,郑方东,戎建涛. 浙江乌岩岭7种林分土壤碳密度及碳氮比分布特征[J]. 南京林业大学学报（自然科学版）. 2019, 43(01): 175-180 https://doi.org/10.3969/j.issn.1000-2006.201803039

QUAN Wei, ZHENG Fangdong, RONG Jiantao. Soil carbon density and C/N distribution of seven forest types in Wuyanling Nature Reserve, Zhejiang Province[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2019, 43(01): 175-180 https://doi.org/10.3969/j.issn.1000-2006.201803039

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基金

收稿日期:2018-03-27 修回日期:2018-06-23基金项目:温州市重点科技创新团队建设项目(C20150008); 浙江泰顺县科技计划项目[泰财教﹝2017﹞238号]。第一作者:权伟(49100892@qq.com),副教授,ORCID(0000-0002-0954-0375)。引文格式:权伟,郑方东,戎建涛. 浙江乌岩岭7种林分土壤碳密度及碳氮比分布特征[J]. 南京林业大学学报(自然科学版),2018,43(1):175-180