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Effect on Co-Situs Application of Coated Urea Complex Fertilizer in Dry Seeded Rice  

Park, Ki-Do (National Yeongnam Agricultural Experiment Station, RDA)
Kwen, Hye-Young (National Institute of Agricultural Science and Technology, RDA)
Park, Chang-Young (National Yeongnam Agricultural Experiment Station, RDA)
Jeon, Weon-Tae (National Yeongnam Agricultural Experiment Station, RDA)
Kim, Choon-Sik (National Yeongnam Agricultural Experiment Station, RDA)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.35, no.2, 2002 , pp. 112-117 More about this Journal
Abstract
This study was conducted to investigate effects on the co-situs application of coated urea complex fertilizer in dry seeded rice in Dukpyong series soil. Number of spikelet established in 15 days after seeding, conventional plot was $120ea\;per\;m^2$. and whole layer placement(WLP), co-situs application 70%(CSA70%) plot and co-situs application 50%(CSA50%) plot were 146, 126 and $120ea\;per\;m^2$, respectively. There was not concentration obstacle in co-situs application plot in spite of closing application between seed and coated urea complex fertilizer. The amount of $NH_4-N$ into soil solution in different growth stage was highest in WLP 70% plot compare to other treatment. N uptaken amount was highest in CSA 70% plot as $94kg\;ha^{-1}$ compare to $90kg\;ha^{-1}$ of WLP 79% plot and $82kg\;ha^{-1}$ of CSA 50% plot. However, N use efficiency of CSA 50% plot was highest among treatments as 48%. Rice yield was highest in CSA 70% plot as 102% compared to conventional plot.
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