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Measurement of CO2 Flux in Rubber Plantation by Eddy Covariance Method
K. Annamalainathan - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Measurement of CO2 Flux in Rubber Plantation by Eddy Covariance Method
ผู้แต่ง / หัวหน้าโครงการ (EN): K. Annamalainathan
บทคัดย่อ (EN): Natural rubber plantation has an economic life of 20-35 years during which it sequesters significant quantities of CO2 from the atmosphere into biomass. There are several methods to study CO2 sequestration potential of a perennial plantation crop like natural rubber. Eddy covariance (EC) method is a state-of-the-art technology in which the fluxes of CO2 and water vapour in any ecosystem can be measured in real time. In the present study, we describe measurements of carbon and water flux continuously for two years in a five-six year old immature natural rubber plantation. From the EC data, the net ecosystem exchanges (NEE) of CO2 and water vapour ware calculated. Mostly, day time recorded net CO2 influx (Aeco) in to the plantation whereas night time witnessed efflux of CO2 through ecosystem respiration (Reco). The net CO2 exchange is the difference between photosynthetic assimilation by the canopy and the total respiratory efflux from the foliage, roots and soil. Sunny days with good soil moisture favored better CO2 sequestration by the rubber plants in this tropical ecosystem. On an average, the NEE was 12g CO2/m2/day which is equivalent to 43.8 t CO2/ha/year. The annual mean NEE. An indicator of C-sequestration rate, increased year by year when the plant growth increased. The ET values calculated from the latent heat of vapourization (LE) indicated a 3-4 mm net evaporative water loss from the immature rubber plantation per day. The current rate of build-up of CO2 in the atmosphere is about 2 ppm/year. Taking a life cycle average rate of 30 tCO2/ ha/year, the world’s 10.5 million ha of natural rubber plantations help to offset the current rate of build-up of CO2 in the atmosphere to the tune of 1.9%. This is a significant ecosystem service provided by the natural rubber plantation.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): Eddy covariance method
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
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Measurement of CO2 Flux in Rubber Plantation by Eddy Covariance Method
K. Annamalainathan
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
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