中亚热带典型人工林土壤酶活性及其化学计量特征

doi:10.13287/j.1001-9332.202006.008

应用生态学报 ›› 2020, Vol. 31 ›› Issue (6): 1980-1988.doi: 10.13287/j.1001-9332.202006.008

中亚热带典型人工林土壤酶活性及其化学计量特征

史丽娟^1,2, 王辉民^1,2, 付晓莉¹, 寇亮¹, 孟盛旺¹, 戴晓琴^1*

¹中国科学院地理科学与资源研究所, 生态系统网络观测与模拟重点实验室千烟洲试验站, 北京 100101;
²中国科学院大学资源与环境学院, 北京 100190

收稿日期:2020-01-17 出版日期:2020-06-15 发布日期:2020-06-15
通讯作者: * E-mail: daixq@igsnrr.ac.cn
作者简介:史丽娟, 女, 1993年生, 硕士研究生。主要从事森林生态系统养分循环研究。E-mail: shilijuan0622@126.com
基金资助:
国家自然科学基金项目(41830860)资助

Soil enzyme activities and their stoichiometry of typical plantations in mid-subtropical China

SHI Li-juan^1,2, WANG Hui-min^1,2, FU Xiao-li¹, KOU Liang¹, MENG Sheng-wang¹, DAI Xiao-qin^1*

¹Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
²College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100190, China

Received:2020-01-17 Online:2020-06-15 Published:2020-06-15
Contact: * E-mail: daixq@igsnrr.ac.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (41830860).

摘要/Abstract

摘要： 以中亚热带典型的马尾松林、湿地松林和马尾松-木荷混交林(针阔混交林)为研究对象,分析不同林分类型下0～10和10～20 cm土层的β-D-葡萄糖苷酶(BG)、β-N-乙酰氨基葡萄糖苷酶(NAG)、亮氨酸氨基肽酶(LAP)、酸性磷酸酶(AP)、多酚氧化酶(POX)、过氧化物酶(POD)6种土壤酶活性,以及酶化学计量比及土壤理化性质特征,分析驱动中亚热带典型林分类型土壤酶活性及其计量比变异的主要因素。结果表明: 林分类型显著影响了土壤BG和LAP活性,表现为湿地松林10～20 cm土层土壤BG显著高于马尾松林,而LAP在马尾松林最高;湿地松林10～20 cm土层土壤BG/(NAG+LAP)、BG/AP显著高于马尾松林,而马尾松林(NAG+LAP)/AP显著高于湿地松林和针阔混交林;林分类型间酶化学计量的向量长度在10～20 cm土层差异显著,表现为湿地松林>针阔混交林>马尾松林。3种人工林酶化学计量的向量角度均大于45°,其中在湿地松林10～20 cm土层向量角度显著大于马尾松林。冗余分析表明,土壤碳质量指数和有机碳与全磷的比值(C/P)以及土壤含水量和C/P分别是0～10和10～20 cm土层土壤酶活性及其化学计量的关键影响因素,土壤碳和磷的数量和质量,以及土壤含水量在调节中亚热带人工林生态系统养分循环中发挥关键作用。

Abstract: We measured the activities of six kinds of enzyme, including β-glucosidase (BG), β-N-acetyl-glucosaminidase (NAG), leucine aminopeptidase (LAP), acid phosphatase (AP), polyphenol oxidase (POX), peroxidase (POD), as well as enzyme stoichiometric ratios and soil physical and chemical properties at 0-10 and 10-20 cm layers across typical Pinus massoniana plantation, Pinus elliottii plantation and mixed plantation of P. massoniana and Schima superba (broadleaved-conifer mixed plantation) in mid-subtropical China. Key factors driving the variation in soil enzyme activity and stoichiometry among different stand types were investigated. The results showed that the activities of soil BG and LAP were significantly affected by stand type. Soil BG activity at 10-20 cm soil layer was significantly higher in P. elliottii plantation than in P. massoniana plantation, while the activity of LAP was highest in the P. massoniana plantation. Soil BG/(NAG+LAP) and BG/AP at 10-20 cm layer of P. elliottii plantation were significantly higher than those of P. massoniana plantation, while (NAG+LAP)/AP of P. massoniana plantation was significantly higher than those of P. elliottii plantation and mixed plantation. The vector length of enzyme stoichiometry at 10-20 cm soil layer was significantly different among stand type, with an order of P. elliottii plantation > broadleaved-conifer mixed plantation > P. massoniana. The vector angles of enzyme stoichiometry in the three plantations were greater than 45°, with the vector angle in the P. elliottii plantation at 10-20 cm soil layer being significantly greater than that of the P. massoniana plantation. Results from redundancy analysis showed that soil carbon quality index and the ratio of soil organic carbon to total phosphorus (C/P), soil water content and C/P were the key factors affecting soil enzyme activity and stoichiometry at 0-10 and 10-20 cm soil layers, respectively. The quantity and quality of soil carbon and phosphorus, and soil water content played a key role in regulating nutrient cycling in mid-subtropical plantation ecosystem.

史丽娟, 王辉民, 付晓莉, 寇亮, 孟盛旺, 戴晓琴. 中亚热带典型人工林土壤酶活性及其化学计量特征[J]. 应用生态学报, 2020, 31(6): 1980-1988.

SHI Li-juan, WANG Hui-min, FU Xiao-li, KOU Liang, MENG Sheng-wang, DAI Xiao-qin. Soil enzyme activities and their stoichiometry of typical plantations in mid-subtropical China[J]. Chinese Journal of Applied Ecology, 2020, 31(6): 1980-1988.

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中亚热带典型人工林土壤酶活性及其化学计量特征

Soil enzyme activities and their stoichiometry of typical plantations in mid-subtropical China

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