Competition in a Mixed-Species Planting with Four Contrasting Tree Species

Abstract Mixed-species systems are well-suited to smallholder and community forestry, but reliable evidence regarding procedures assess species performance in such is scarce. This field trial uses a pair of clinal plots with varying spacing composition gain insights into competition between four proposed for landscape rehabilitation the Philippines. We examine efficiency this compact revealing growth traits ( Paraserianthes falcataria, Pterocarpus indicus, Shorea palosapis, Swietenia macrophylla ) mixed plantings. The use size-distance index allowed an assessment competitive collaborative influences tree species. Within expected general trend diameter increment decline increasing competition, there were indications that palosapis benign competitor may stimulate neighbouring individuals. falcataria strong also strongly impacted by especially through antagonistic intraspecific competition. appears well suited as solitary or village, whereas seems ideal plantations, both monoculture mixture trial, when examined using based on increment, revealed useful performance. indicus exhibits intraspecific, low inter-specific so polyculture Of trialled, be best-suited it lowest