배 재배지의 탄소수지 산정에 관한 연구
The Study on Carbon Budget Assessment in Pear Orchard
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참고문헌
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초록
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, 429.1 mg CO2 m-2 h-1 was released to atmosphere and sensitivity of soil temperature (Q10) 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 CO2 by herb’s photosynthesis and respiration was 156.1 mg CO2 m-2 h-1. Woody plants showed the 680.1 mg CO2 m-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 0.04 ton CO2 ha-1 during the measurement period, and it showed that pear orchard act as a CO2 sink. This study using various approaches is expected to present a methodology for evaluating the carbon budget of perennial woody crop plantations.
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, 429.1 mg CO2 m-2 h-1 was released to atmosphere and sensitivity of soil temperature (Q10) 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 CO2 by herb’s photosynthesis and respiration was 156.1 mg CO2 m-2 h-1. Woody plants showed the 680.1 mg CO2 m-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 0.04 ton CO2 ha-1 during the measurement period, and it showed that pear orchard act as a CO2 sink. This study using various approaches is expected to present a methodology for evaluating the carbon budget of perennial woody crop plantations.
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