Bui Nganh
Nguyen Ngoc Dich
INTRODUCTION
Investigation on the changing of some micro-climatic factors in the forest to serve forest regeneration work was carried out by using an obsis station to collect data according to procedures from the Meteological Department. There was one station placed in mixed broadleaved forest with shading of 0.7-0.8, and one station placed in an open area at Nuitien.
RESULTS
1. Changing of the temperature regime in the forest
– Due to the effect of forest flora, the average temperature and maximum temperature in the forest is always lower than the average and maximum temperature in an open area. It must be especially noted that the absolute maximum temperature on the soil surface in the open sometime can be 30.4oC higher than that on the soil surface in the forest and the absolute value can be up to 69oC.
– Forest flora and vegetation increased the minimum temperature in the forest and limited the temperature reducing process in the cold season. In the forest, minimum temperature is always higher than in the open. Therefore at Nuitien area, there was no frost in the forest, while in the open, frequent frosts can occur.
Latest news
- Project: Study on integrated management of insect pests and diseases on Docynia indica in northern Vietnam
- 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)
- Project: Pilot plantation and completion of planting techniques of technologically advanced germplasm of Acacia auriculiformis (AA42, AA53, AA56, AA92, AA95) for sawlog in the southeast and south central.
- 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
- study on regeneration techniques for poor, depleted forest at huulung by using prunus abborea andphoebe species (1972 - 1977)
- 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
