[Effect of crop density and ost fertilizer on growth and yield of red onion (Allium ascalonicum L.)]
1993
Syamsiah (Universitas Syiah Kuala, Darussalam, Banda Aceh (Indonesia))
Experiment was conducted from September 1992 to December 1992 at experimental farm of Research and Development Center for Food Crop Lampineung, Banda Aceh with elevation of approx. 3 meters above sea level. Experiment conducted used Randomized Block Design (RAK) with 4 x 4 Factorial (4 levels of crop density and 4 levels of ost fertilizer dosage) and with 3 replications. Crop density was 20 cm x 10 cm; 20 cm x 15 cm; 20 cm x 20 cm and 20 cm x 25 cm. Fertilizer dosages applied were 0 kg/hectare; 250 kg/hectare; 500 kg/hectare and 750 kg/hectare. Parameters observed were crop height at age 15, 30 and 45 days after planting, weight of fresh onion per plot, weight of dry onion per plot, number of onion plant per planting stool and percentage size of onion plant. Crop density had significant effect on crop height at age of 45 days after planting, weight of fresh onion per plot and weight of dry onion per plot, except for crop height at age 15 and 30 days after planting. Number of onion per planting stool and percentage size of onion plant was not significant. The best growth of onion is at distance planting 20 cm x 10 cm. Application of ost fertilizer had significant effect on crop height at age of 45 days after planting, weight of fresh onion per plot, weight of dry onion per plot and number of onion per planting stool, but had no significant effect on crop height at age of 15 and 30 days after planting and percentage size of onion plant. Optimum dosage of fertilizer is 500 kg/hectare. There is an interaction between crop density and dosage of ost fertilizer toward crop height at age of 45 days after planting toward weight of fresh onion per plot and weight of dry onion per plot. At planting distance of 20 cm x 10 cm, dosage of ost fertilizer is more efficient (500 kg/hectare)
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