Accounting the net carbon sequestered of various agroforestry systems (AFSs) in Zamboanga City, Philippines

Issue Date

3-2020

Abstract

The importance of agroforestry as a land-use system for carbon (C) sequestration had been recognized. The various levels of C stocks expressed into CO2 sequestered by major agroforestry systems (AFSs) across the 16 community-based forest management (CBFM) sites in Zamboanga City, Philippines was investigated. The major AFSs were compared to pure forest stand (PFS). Among the AFSs, the rubber-based had the highest C stocks at 68.93 tC ha-1 compared to lanzones-based (60.33 tC ha-1), marang-based (60.23 tC ha-1) and mango-based (60.01 tC ha-1). Some other types had below 60.0 tC ha-1 C stocks. In terms of net carbon dioxide equivalent (net CO2e) sequestered, the PFS had the highest at 1,098.62 tCO2e ha-1 compared to the top four AFSs with the highest net tCO2e sequestered such as the rubber based, lanzones, marang and mango-based AFSs where each had about 248.66, 217.70, 218.17 and 217.41 tCO2e ha-1, respectively. The PFS had 5-7 times higher CO2e sequestered compared with the top four AFSs. Results provided data that none of the AFSs can replace the real pristine forest in terms of C sequestration (5.0 ha AFS is equal to 1.0 ha pristine forest) and its watershed role as a net concerver of water. Further, it was observed that no water was available in the 16 CBFM sites and community residents had to fetch water for their household use. Also, Zamboanga City, Philippines had insufficient water for domestic use during extended rainless or El Nino months.

Source or Periodical Title

International Journal of Agricultural Technology

ISSN

2630-0192 (online)

Volume

16

Issue

2

Page

457-474

Document Type

Article

Physical Description

map, table, references

Language

English

Subject

Agroforestry systems, Energy inputs, Net carbon emission, Net carbon sequestered, Pure forest stand

Digital Copy

Yes

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