Le Dinh Kha
Pham Anh Tuan
INTRODUCTION
Pines are the main species for planting on bare hill soils of our country at present. To find some pine species with fast growth and adaptability to certain soil and climatic conditions is an important step in increasing the effectiveness of a planting programme.
This research subject investigates the growth situation of P.kesiya and P.merkusii with various provenances, P.caribaea and P.massoniana. Pines were sown in bags having the same fertilizer treatment.
RESULTS AND REMARKS
– Due to some anatomical and morphological characteristics, the three -needled pine of Hagiang is a variety of P.kesiya and can be determined as P.kesiya Royle ex Gordon var. Hagianensis .
– P.kesiya, P.massoniana and P.caribaea all belong to the fast-growing group in nursery (10 month old seedlings in 1977 were 20-30 cm high and 4.2-6.8 big in diameter). P. merkusii belongs to the slow-growing group in nursery (10 months old seedlings in 1977 could reach 4.7-7.8 cm height and 5.6-7.1 mm diameter).
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
- preliminary study on increment rules to serve as temporary basis for p.kesiya management at lamdong province (1977)
- study on biological characteristics of cyrtotrachelus longimarus worms and control measures
- preliminary results of investigation on erosion status and measures for erosion prevention in soilsused for planting styrax tonkinensis at tuquan,hatuyen province (1974 - 1976)
- study on methods of regeneration and stable, continuos management of styrax tonkinensis forest on harvested areas(1971 - 1974 )
- study on planting techniques of styrax tonkinensis to supply raw material for paper industry intuquan district, tuyenquang province (1973 - 1976)
