秦岭典型林分土壤活性有机碳及碳储量垂直分布特征

应用生态学报

秦岭典型林分土壤活性有机碳及碳储量垂直分布特征

王棣¹,耿增超^1**,佘雕²,和文祥¹,侯琳³

(¹西北农林科技大学资源环境学院/农业部西北植物营养与农业环境重点实验室, 陕西杨凌 712100; ^2西北农林科技大学水土保持研究所, 陕西杨凌 712100; ³西北农林科技大学林学院, 陕西杨凌 712100)

出版日期:2014-06-18 发布日期:2014-06-18

Vertical distribution of soil active carbon and soil organic carbon storage under different forest types in the Qinling Mountains.

WANG Di¹, GENG Zeng-chao¹, SHE Diao², HE Wen-xiang¹, HOU Lin^3

(¹Ministry of Agriculture Key Laboratory of Plant Nutrition and Agrienvironment in Northwest China/College of Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China; ²Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China; ³College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China)

Online:2014-06-18 Published:2014-06-18

摘要/Abstract

摘要：

采用野外调查结合室内分析的方法,2013年8月分析了秦岭典型林分锐齿栎(马头滩林区,Ⅰ)、油松(Ⅱ)、华山松(Ⅲ)、松栎混交林(Ⅳ)、云杉(Ⅴ)、锐齿栎(辛家山林区,Ⅵ)土壤剖面上活性有机碳及碳储量的分布规律.结果表明: 研究区各林分土壤的有机碳、微生物生物量碳、水溶性碳、易氧化态碳含量均随着土层深度的增加而不断减小;在整个土壤剖面(0～60 cm)上,云杉和松栎混交林的土壤有机碳和水溶性碳含量明显高于其余林分,不同林分的土壤有机碳和水溶性碳含量的平均值大小均为Ⅴ＞Ⅳ＞Ⅰ＞Ⅱ＞Ⅲ＞Ⅵ;各林分不同土层的微生物生物量碳在71.25～710.05 mg·kg^-1,不同林分的土壤微生物生物量碳大小依次为Ⅰ＞Ⅴ＞Ⅳ＞Ⅲ＞Ⅱ＞Ⅵ;整个土壤剖面上,松栎混交林的土壤易氧化态碳含量降幅最大,不同林分土壤易氧化态碳含量的平均值大小为Ⅳ＞Ⅴ＞Ⅰ＞Ⅱ＞Ⅲ＞Ⅵ.3种活性有机碳占有机碳的比例在不同林分类型中没有表现出一致的规律性.各林分0～60 cm土层的有机碳储量大小为Ⅴ＞Ⅰ＞Ⅳ＞Ⅲ＞Ⅵ＞Ⅱ.各林分的土壤微生物生物量碳、水溶性碳、易氧化态碳两两之间均表现为极显著相关,各林分的土壤微生物生物量碳、水溶性碳、易氧化态碳与土壤有机碳、全氮之间的相关性均表现为显著或极显著水平,与碳氮比、pH、土壤水分、土壤容重的相关关系不显著.

Abstract: Adopting field investigation and indoor analysis methods, the distribution patterns of soil active carbon and soil carbon storage in the soil profiles of Quercus aliena var. acuteserrata (Matoutan Forest, Ⅰ), Pinus tabuliformis (Ⅱ), Pinus armandii (Ⅲ), pineoak mixed forest (Ⅳ), Picea asperata (Ⅴ), and Quercus aliena var. acuteserrata(Xinjiashan Forest, Ⅵ) of Qinling Mountains were studied in August 2013. The results showed that soil organic carbon (SOC), microbial biomass carbon (MBC), dissolved organic carbon (DOC), and easily oxidizable carbon (EOC) decreased with the increase of soil depth along the different forest soil profiles. The SOC and DOC contents of different depths along the soil profiles of P. asperata and pineoak mixed forest were higher than in the other studied forest soils, and the order of the mean SOC and DOC along the different soil profiles was Ⅴ＞Ⅳ＞Ⅰ＞Ⅱ＞Ⅲ＞Ⅵ. The contents of soil MBC of the different forest soil profiles were 71.25-710.05 mg·kg^-1, with a content sequence of Ⅰ＞Ⅴ＞Ⅳ＞Ⅲ＞Ⅱ＞Ⅵ. The content of EOC along the whole soil profile of pineoak mixed forest had a largest decline, and the order of the mean EOC was Ⅳ＞Ⅴ＞Ⅰ＞Ⅱ＞Ⅲ＞Ⅵ. The sequence of soil organic carbon storage of the 0-60 cm soil layer was Ⅴ＞Ⅰ＞Ⅳ＞Ⅲ＞Ⅵ＞Ⅱ. The MBC, DOC and EOC contents of the different forest soils were significanty correlated to each other. There was significant positive correlation among soil active carbon and TOC, TN. Meanwhile, there was no significant correlation between soil active carbon and other soil basic physicochemical properties.

王棣1,耿增超1**,佘雕2,和文祥1,侯琳3. 秦岭典型林分土壤活性有机碳及碳储量垂直分布特征[J]. 应用生态学报.

WANG Di1, GENG Zeng-chao1, SHE Diao2, HE Wen-xiang1, HOU Lin3. Vertical distribution of soil active carbon and soil organic carbon storage under different forest types in the Qinling Mountains.[J]. Chinese Journal of Applied Ecology.