| Yazarlar (5) |
Prof. Dr. Renato Sabanal PACALDO
Kastamonu Üniversitesi, Türkiye |
|
Aileen Mae Galigao
Mindanao State University, Philippines |
|
Evelyn V. Bigcas
Mindanao State University, Philippines |
|
Nelieta A. Bedoya
Mindanao State University, Philippines |
|
Mark Joseph Buncag
Mindanao State University, Philippines |
| Özet |
| Solar radiation provides the energy to drive photosynthesis and is the primary agent limiting green plant production. Because the absorbed solar radiation is linearly related to above-ground biomass production, plants' photosynthetic conversion efficiencies (ɛ) of the solar energy could be used to estimate biomass production and carbon sequestration. How efficiently the plant converts solar radiation energy in biomass production is a critical question that needs a better understanding. This study aims to quantify the photosynthetic conversion efficiencies of Falcata (Falcataria falcata) stands as they age. In estimating the efficiency, we employed the "black box"empirical model as described by Landsberg (1983), Cannell (1987), Janssen et al. (2001), and Pacaldo (2015). Under this approach, the fraction of the amount of photosynthetic active radiation (APAR) incident on the top of the canopy, reflected and transmitted solar radiations are measured, and together with the forest biomass production data, the amount of carbon sequestration was estimated. We measured DBH and total height of 5-, 6-, 7-, 8-, 9-, and 10-year-old Falcata stands and determined the aboveground biomass production using allometric equations. We used Dunn and Leopold's published solar radiation estimates (1978) to estimate the net incoming solar radiation (Sn) of the research site's latitude. Results revealed that the mean photosynthetic conversion efficiency (ɛ) ratio of 0.10 (±0.02) across different ages, which is equivalent to 10.35 (±1.90) percent and 5.29 (±0.97) g biomass yield yr-1 MJ -1 of APAR. The DBH provides valuable information for predicting the trajectory of ɛ over time as the ages. Stand density also exerts dominant control on ɛ during the earlier stages of growth. Our results highlight the alternative non-destructive option of estimating biomass and carbon sequestration of forest ecosystems using the conversion efficiency plants to intercept and convert photosynthetically active solar radiation into biomass products. |
| Anahtar Kelimeler |
| Active Photosynthetic Radiation | Black Box Model | DBH | Photosynthetic Conversion Efficiency | Solar Radiation | Total Height |
| Bildiri Türü | Tebliğ/Bildiri |
| Bildiri Alt Türü | Tam Metin Olarak Yayımlanan Tebliğ (Uluslararası Kongre/Sempozyum) |
| Bildiri Niteliği | |
| Bildiri Dili | İngilizce |
| Kongre Adı | Iop Conference Series Earth and Environmental Science |
| Kongre Tarihi | / |
| Basıldığı Ülke | |
| Basıldığı Şehir |
| Atıf Sayıları |
