Effects of Calcium and Magnesium Levels on Growth and Development of <I>Vanda</I> ‘Sansai Blue’

Abstract

Effects of calcium and magnesium concentrations on growth and development of Vanda ‘Sansai Blue’ were studied, using one year old of Vanda ‘Sansai Blue’ as plant materials in two experiments. Experiment 1, plants were supplied with 6 different concentrations of calcium (0, 100, 200, 300, 400 and 500 mg/l) in nutrient solution. It was found that the greatest plant height was found in calcium 200 mg/l application. Experiment 2, plants were supplied with 6 different concentrations of magnesium (0, 100, 200, 300, 400 and 500 mg/l) in nutrient solution. It was found that magnesium at 100 mg/l produced greatest of plant height, number of leaves per plant, leaf width, leaf length and leaf thickness of Vanda ‘ Sansai Blue ’