Abstract
Rice husk charcoal produced from pyrolysis is widely tested as a coating material for slow release urea. Rice husk charcoal-coated urea is part of a smart fertilizer strategy for more sustainable dan resilient green rice production. This study was conducted to evaluate the effects of coated urea (CU) application at some dosage for specific West Nusa Tenggara Province environment. The pot experiment was arranged in Randomized Block Design with five treatment of coated urea at 25%, 50%, 75%, and 100% of 250 kg ha−1 rate that compared to control at 100% non-coated urea. The Experiment conducted at Narmada Research Station of Assessment Institute of Agricultural Technology (AIAT) of West Nusa Tenggara Province – Indonesia from January to April 2020. The results showed that the CU application did not significantly increase rice yield and harvest index. The tiller number and percentage of filled spikelets tend to increase in proportion to the CU application rate. Although there were no significant differences in plant growth and yield component, yield at 75% CU treatment increased at about 14.03% higher than the control which was indicating possible efficient use of rice husk charcoal-coated urea fertilizer.
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