Effects of Nitrogen Levels on Growth and Nutrition Content of <I>Vanda</I> Hybrid
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Abstract
Vanda is recognized as a heavy feeder fertilizer especially nitrogen. The availability of N is an important fertilizer for orchid crop production. The research of optimum fertilizer level for growth and flowering of Vanda was rarely reported. The objective of this study was to determine the effect of N levels on growth and nutrition content of Vanda ‘Ratchaburi Fuchs-Katsura’. Three levels of N fertilizer i.e. 0, 200 and 400 mg/L were supplied to plant with 100 ml/plant once a week. All treatments comprise of 100 mg/L of P fertilizer and 200 mg/L of K fertilizer compared with control treatment (supplied only deionized water). The experimental design was completely randomized design (CRD) with 4 treatments and 10 replications. Plant height, stem height, number of leaves per plant, days to flower and nutrition content were measured. The results found that N level at 400 mg/L showed a tendency of growth rate, nitrogen and phosphorus content in leaves, stem and roots higher than other treatments however it delayed flowering time. N level at 200 mg/L could stimulate earlier flowering and also gave the highest of potassium content in Vanda leaves.
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