ISHS Acta Horticulturae 710: International Symposium on Greenhouses, Environmental Controls and In-house Mechanization for Crop Production in the Tropics and Sub-Tropics
EVALUATION OF CABBAGE CULTIVARS (BRASSICA OLERACEA VAR. CAPITATA) UNDER PLASTIC RAIN-SHELTER ON MINERAL SOILS IN THE LOWLANDS |
| Authors: | P.Y. Yau, S. Ahmad, M.K. Illias, K. Ganisan |
| Keywords: | yield, compost, disease incidence, cultivars, protective structures |
| Abstract:
Six heat-tolerant cabbage cultivars were evaluated under plastic rain-shelters on mineral soils at MARDI Kluang, Johor. The cultivars were ‘KK cross’, ‘Summer Autumn’, ‘King of Kings’, ‘Beijing Siji’, ‘Orient Express’ and ‘Magic Ball’. The normal fertilization system using 5 tons/ha of organic fertilizer (oil palm empty fruit bunch or EFB compost) as basal dressing supplemented with 1.5 tons/ha of NPK 12:12:17:2 compound fertilizer was compared to 20 tons/ha EFB compost and 0.3 ton/ ha of NPK compound fertilizer. The results showed that 20 tons EFB compost/ha with 0.3 ton/ha inorganic fertilizer supplements resulted in higher yield and lower disease incidence compared to 5 tons compost/ha and 1.5 tons/ha of NPK fertilizer. Among the six cultivars tested, though ‘Summer Autumn’ resulted in highest yield of 25.8 tons/ha; its yield showed no significant difference with ‘Beijing Siji’, ‘KK cross’ and ‘King of Kings’ with yields ranging from 23.8 tons/ha to 24.6 tons/ha. ‘Magic Ball’ and ‘Orient Express’ significantly resulted in lower yields (13.3 tons/ha and 15.9 tons/ha respectively) than the rest. However, ‘Magic Ball’ and ‘Orient Express’ cultivars were relatively very tolerant to bacterial soft rot attacks. The least tolerant to bacterial soft rot attacks was the ‘Beijing Siji’ cultivar. | |
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