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http://dx.doi.org/10.11626/KJEB.2015.33.3.345

The Study on Carbon Budget Assessment in Pear Orchard  

Suh, Sanguk (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Choi, Eunjung (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Jeong, Hyuncheol (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Lee, Jongsik (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Kim, Gunyeob (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Lee, Jaeseok (College of Bioscience and Biotechnology, Konkuk University)
Sho, Kyuho (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Publication Information
Korean Journal of Environmental Biology / v.33, no.3, 2015 , pp. 345-351 More about this Journal
Abstract
This study was conducted to find out the methodology of carbon budget assessment among soil, atmosphere and plant. Soil respiration, net ecosystem productivity of herbs and net ecosystem productivity of woody plants have been measured in 30 years old pear orchard at Naju. Closed Dynamic Chamber (CDC) method was used to measure soil respiration and net ecosystem productivity of herbs. Net ecosystem productivity of woody plant (pear) was determined by eddy covariance method using the EddyPro (5.2.1) program. As for soil respiration, $429.1mgCO_2m^{-2}h^{-1}$ was released to atmosphere and sensitivity of soil temperature ($Q_{10}$) was 2.3. In case of herbs, respiration was superior to photosynthesis during measurement period. From 20 to 24 Jun 2015, the sum of absorbed and released $CO_2$ by herb's photosynthesis and respiration was $156.1mgCO_2m^{-2}h^{-1}$. Woody plants showed the $680.1mgCO_2m^{-2}h^{-1}$ of absorption by photosynthesis. In a farm scale, the sum of soil respiration, and net ecosystem productivity of herbs and woody plants was $0.04tonCO_2ha^{-1}$ during the measurement period, and it showed that pear orchard act as a $CO_2$ sink. This study using various approaches is expected to present a methodology for evaluating the carbon budget of perennial woody crop plantations.
Keywords
soil respiration; net ecosystem productivity; eddy covariance; pear orchard;
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