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Responses of soil extracellular enzyme activities to carbon input alteration and warming in a subtropical evergreen broad-leaved forest
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- 1CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan 666303, China
2Center for Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla, Yunnan 666303, China
3South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
4Ailaoshan Station for Subtropical Forest Ecosystem Studies, Jingdong, Yunnan 676209, China; and 5University of Chinese Academy of Sciences, Beijing 100049, China
5University of Chinese Academy of Sciences, Beijing 100049, China
Received date: 2020-09-11
Accepted date: 2020-11-25
Online published: 2021-01-07
Supported by
National Natural Science Foundation of China(31870467);National Natural Science Foundation of China(U1602234);CAS 135 Project(2017XTBG-F01);CAS 135 Project(2017XTBG-T01)
Abstract
Aims The objective was to investigate the responses of soil extracellular enzyme activities to carbon input alteration and warming in a subtropical evergreen broad-leaved forest of Ailao Mountain, Yunnan, southwest China.
Methods This study was based on two soil depths (0-5 and 5-10 cm) for four treatments under a long-term soil warming experiment in a subtropical evergreen broad-leaved forest of Ailao Mountain, Yunnan, southwest China. Potential activities of β-glucosidase (BG), polyphenol oxidase (POX), peroxidase (PER), β-1,4-N-acetylglucosaminidase (NAG) and acid phosphatase (AP) and their stoichiometric ratios were measured. Soil physical and chemical properties were also analyzed.
Important findings The results showed that in the control treatment, activities of all enzymes except POX decreased significantly with soil depth. Compared with the control treatment, long-term litter removal significantly reduced AP and BG activities at 0-5 cm soil depth, but had no significant effect on NAG, PER and POX activities at both 0-5 and 5-10 cm soil depths. Long-term root removal significantly reduced BG activity at 0-5 cm soil depth, while increased PER activity at both soil depths. Long-term root removal and warming treatment significantly reduced AP and BG activities at 0-5 cm soil depth, but had no significant effect on activities of other enzymes at both soil depths. The results of redundancy analysis showed that soil water content and NH4+-N content were likely importame activities among treatments. This research provides critical information on the activities of soil enzymes related to carbon, nitrogen and phosphorus cycling in response to global change in this subtropical forest ecosystem.
Cite this article
LIU Shan-Shan, ZHOU Wen-Jun, KUANG Lu-Hui, LIU Zhan-Feng, SONG Qing-Hai, LIU Yun- Tong, ZHANG Yi-Ping, LU Zhi-Yun, SHA Li-Qing . Responses of soil extracellular enzyme activities to carbon input alteration and warming in a subtropical evergreen broad-leaved forest[J]. Chinese Journal of Plant Ecology, 2020 , 44(12) : 1262 -1272 . DOI: 10.17521/cjpe.2020.0310
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