THE SILVICULTURAL AND ECOLOGICAL CHARACTERISTICS OF PINUS KREMPFII H.LEC IN LAM DONG PROVINCE

Abstract

The Vietnamese endemic flat-needles pine Pinus krempfii H. LEC grows naturally in Langbian
plateau. In the distribution area, Pinus krempfii is founded in broad – leaved and coniferous
mixed forest type, with several characters of stand: the average density is 853 trees per hecta,
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average height is 17.2m and average diameter at breast height is 23.6cm. The stand is highly
diversity with 100 species, of 62 genus that belong to 35 families.
In the stand, the soil pHKCl diverses from 4.9-5.3; nutrtion varies between 0.138 and 0.441;
meanwhile P2O5 varies between 0.013 – 0.415 and K2O from 0.013 – 0.051.
From the collected data of 45 temporal sample plots, it is indicated that the number of individual
of Pinus krempfii is low with average of 21 trees/ha, average diameter and heigh is 62.7cm and
24.5m. It is clear that all individuals are matured or over matured.
Pinus krempfii emerges as one of 10 ecological dominant species in stand, with IV%= 5,2%.
There are positive relationship between Pinus krempfii and Pinus dalatensis, and consistent
random relationship among Pinus krempfii with Craibiodendron heryi, Syzygium zeylanicum,
Syzygium wightianum, Craibiodendron vietnamense, Castanopsis echidnocarpa, Elaeocarpus
lanceifolius and Fokienia hodginsii. But it has a negative relationship with Lithocarpus
pseudosundaicus