The Study on Optimization Condition forGrowth of Dendrobium friedericksianum Rchb.f. Seedling on natural material in Green House

Abstract

The study was to examine the optimization condition for the growth of Dendrobium friedericksianum Rchb.f. seedlings on 3 types of natural materials namely moss, foam : coconut dust (1:1 by volume) and coconut dust. This experiment plan is the completely randomized design and 3 replication. In the growth on moss and on coconut dust foam was better, height and diameter of stem, than that on coconut dust only, and the growth on the materials in plastic baskets was better than that growing in inch pots. For the cultivation of orchid seedlings on 4 types woody branch namely samed, rambutan, pararubber and kratintapa under 2 types of shading was planed by split plot design and 3 replications. It was found that the height of shoots, the diameter of stems, and the percent survival of the orchid seedlings cultivated under 1 plastic layer of UV protection plus 2 layers of 50 % salan roofs tended to be higher than those cultivated under 1 plastic layer of UV protection plus 1 layer of 50% salan roofs but there were fewer shoots in number. The growth of the orchid seedlings on 4 types woody branch did not significant.

Key words : Dendrobium friedericksianum Rchb.f, light intensity, temperature, natural material