Tran Nguyen Giang
Nguyen Dinh Huong
INTRODUCTION
The forest selected for research is the forest at Huulung (Langson province) which was exploited many times by selective cutting and only crooked trees belonging to Phoebe sp. (Machilus sp.), Gironniera subaequalis, Canarium sp., Erythrophoeum fordii, Pithecolobium clyperia, Pterosperum heterophyllum, Trema sp. and bamboos have been left. Naturally regenerated trees are found in very low number andare weak and irregularly distributed. Climbing plants and shrubs cover the soil. For this poor, depleted forest, artificial regeneration must be applied in order to rehabilitate to establish a forest having a higher proportion of economically valuable species and simpler species composition. Prunus arborea and Phoebe species, locally found species were used in the experiment.
Prunus arborea is found in almost all secondary forests in northern Vietnam. It has big -sized wood with many uses. Regeneration by coppice and seed is strong, and it has fruit which seed yearly. It requires soil having the properties of forest soil and at the juvenile stage it needs light shading. It grows quite quickly after 3 years of age.
Phoebe species has many similar characteristics to Prunus arborea, however, its requirement for light is higher. The species prefers light and moisture and grows quite fast in forest rehabilitated after complete exploitation. Therefore, it is generally found with other, pioneering tree species.
Latest news
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- Project: Study on integrated pest management of major leaf insect pests and stem borer beetles in Acacia hybrid, A. mangium and A. auriculiformis in Vietnam
- Project: Research and develop an integrated management program for control of cinnamon pests in some main cinnamon growing areas (Northern mountainous region and Quang Nam province)
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- Project "Research on selection of varieties and intensive afforestation techniques of Prunus arborea (Blume) Kalkman for providing lager timber in the Northeast and Northwest regions, Vietnam"
Oldest news
- trials of planting techniques, forest enrichment at song hieu area (nghe an province) by using aglaia sp., michelia sp., chukrasia tabularis,manglietia glauca and ormosia balansae ( 1976-1977)
- study on techniques to enrich poor, depleted forest at cauhai by additional planting (1974 - 1977)
- experiment on planting cassia siamea and erythrophloeum fordii to improve degraded forests which contain neohouzeaua dullosa, bamboos, climbing plants and shrubs at huulung (1974-1977)
- study on planting technique and management of dendrocalamus membranaceus forest forestablishment of large-scale plantations
