Soil Respiration May Overestimate or Underestimate in Forest Ecosystems

Yuanbo Cao, Huijie Xiao, Baitian Wang, Yunlong Zhang, Honghui Wu, Xijing Wang, Yadong Yang and Tingting Wei
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Yuanbo Cao: National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Huijie Xiao: College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
Baitian Wang: College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
Yunlong Zhang: College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China
Honghui Wu: National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Xijing Wang: Beijing Vocational College of Agriculture, Beijing 102442, China
Yadong Yang: National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Tingting Wei: China National Gold Group Co., Ltd., Beijing 100011, China

Sustainability, 2021, vol. 13, issue 5, 1-16

Abstract: The inappropriate selection of measurement points and measurement times in an ecosystem may easily lead to the underestimation or overestimation of soil respiration due to spatial and temporal heterogeneity. To assess the law of spatial and temporal heterogeneity and more accurately determine the soil respiration rate, we measured the soil respiration rate of a forest in the plant growing season from 2011 to 2013 on Changbai Mountain in 8 directions and 7 distances from each tree trunk. Neglecting the direction of the measuring point may overestimate or underestimate the soil respiration rate by 29.81% and 26.09%, respectively; neglecting the distance may overestimate or underestimate the soil respiration rate by 41.36% and 20.28%, respectively; and ignoring the measurement time may overestimate and underestimate the soil respiration rate by 41.71% and 57.64%, respectively. In addition, choosing a measurement point in the eastern direction at a 1.8 m distance and conducting the measurement in September may relatively accurately reflect the soil respiration rate of the ecosystem. These findings can deepen our understanding of soil respiration rate heterogeneity and may provide new ideas for improving the measurement method of soil respiration.

Keywords: soil respiration rate in forest ecosystem; spatial and temporal heterogeneity; measurement points and measurement times; soil respiration accuracy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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