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| Comprehensive evaluation on ornamental andutilization value of Dendrobium |
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| Abstract: |
| Forty-six native species of Dendrobium were cultivated and observed for five years，22 indexes
including flower color，flower diameter，flower type，number of flowers，fragrance，flowering days，nature flowering
time，labellum，survival rate，disease resistance，insect resistance，plant height，plant type，growth vigour，
pseudobulb shape，internode，pseudobulb color，leaf color，leaf texture，leaf type，new bud number，fruiting rate
were comprehensively evaluated to establish the evaluation system of ornamental and utilization value of Dendrobium
by means of AHP. The results showed that survival rate，plant type and flower color had important effects on the
ornamental and utilization value of Dendrobium，and their weights were 14.3%，13.4% and 13.3% respectively. 46
species of Dendrobium were clustered into 4 grades by K-Means cluster method. There were 10 species in graded Ⅰ
class，18 species in graded Ⅱ class，11 species in graded Ⅲ class，7 species in graded Ⅳ class， the occupancies were
21.7%，39.1%，23.9% and 15.2% respectively. By using the evaluation system，Vietnam native species including Den.
chrysotoxum，Den. pulchellum and Den.signatum，Chinese native species like Den. polyanthum，Den. lituiflorum，
Den.hercoglossum，Den.nobile，D.densiflorum，Den.thyrsiflorum and Den. gratiosissimum were screened out，they had
superior ornamental value and was fit to pot production by tissue propagation |
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