Floral attributes and management practices of pubic green spaces in two major urban cities of Western Visayas, Philippines
2010
Tutor, J.A.A.
The study was conducted in six public green spaces of Bacolod City and Iloilo City [Philippines] from March to December 2009. It aimed to determine the floral attributes and management practices of public green spaces in two major urban cities of Western Visayas. Eucalyptus camaldulensis was the most common tree species in Bacolod City while Swietenia macrophylla was prevalent in Iloilo City. Of the 1,892 woody species in Bacolod City, there were 52 species, 37.25% were exotic, 45 genera, and 26 families. In Iloilo City, there were 563 woody species, comprising 34 species, 70.59% were exotic, 33 genera, and 21 families of trees. Mean stocking was 102.08 stems/ha and 100.25 stems/ha, in Iloilo City and Bacolod City, respectively. Simpson Diversity index was high in the green spaces of Iloilo City and moderately high in Bacolod City. Leaf spot and anthracnose were the most common leaf disease, while canker and stem rot were common stem diseases. Embedded nails and GI wires were the most common causes of injury of the trees. Overall Tree Conditioning Rating showed that majority of trees in Pana-ad Park and Stadium and Plaza Libertad belonged to Class 1, Bacolod City Plaza and Jaro Plaza belonged to Class 2, Capitol Park and Lagoon and Lapaz Plaza belonged to Class 3. Green spaces were managed by different LGUs [local government units] with only Iloilo City having a centralized office taking charge of all the green spaces. There were no management objectives in all green spaces, limited involvement of NGOs [non-government organizations], civic organizations and other volunteer groups in green space management and limited technical capabilities in managing tree resources. Organic matter P and K were low and CEC [cation exchange capacity] was moderately favorable to growth of plants. CEC was significantly higher in Iloilo City than in Bacolod City. Among the soil properties, only BD [bulk density] was correlated with MH [merchantable height] and ULCR [uncompacted live crown ratio] at 16 to 30 cm depth. Management capabilities and cultural practices were not correlated with OTCR [overall tree conditioning rating]. Carbon stored in biomass was 147.90 t/ha in Iloilo City and 112.99 t/ha in Bacolod City. Iloilo City had higher SOC [soil organic carbon] (41.62 t/ha) than Bacolod City (39.89 t/ha) at 0 to 15 cm and at 16 to 30 cm depth with 36.95 t/ha. It is highly recommended that both Bacolod and Iloilo City should expand existing green spaces and encourage the planting of native species both indigenous and endemic. Moreover, too cities need to formulate management plan, strengthen the technical capabilities of greening staff and harness community participation in green space management.
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