2025-01-132025-01-132016-10CARVALHO, Maria da Conceição Santana; NASCENTE, Adriano Stephan; TEIXEIRA, Paulo César. Fertilizers with coated urea in upland rice production and nitrogen apparent recovery. Bioscience Journal, Uberlândia, v. 32, n. 5, p. 1155-1164, 2016. DOI: 10.14393/BJ-v32n5a2016-33068. Disponível em: https://seer.ufu.br/index.php/biosciencejournal/article/view/33068. Acesso em: 12 dez. 2024.e- 1981-3163http://repositorio.bc.ufg.br//handle/ri/26342Urea is the most used N fertilizer for upland rice, however, a great percentage of N loss can occur with the use of this fertilizer. The use of products that provide reduction of N loss for urea fertilizers can contribute to increase N use efficiency. The objective of this study was to determine the effect of N rates applied in the form of coated urea in the content and accumulation of N in dry biomass, apparent recovery of nitrogen and grain yield of upland rice. The experimental design was a randomized complete blocks arranged in a 4 x 3 + 1 factorial scheme. The treatments consisted of four sources of N fertilizer [1. Common urea; 2. Polymer-coated urea for slow release of N (PCU); 3. urea with the urease inhibitor N-(n-Butyl) thiophosphoric triamide (NBPT); and 4. urea coated with copper sulfate and boric acid as urease inhibitors (UCCB)], with three fertilization rates (30, 60 and 90 kg ha-1 of N). In addition, we included a control treatment without N application. Coated urea did not provide increases in rice grain yield in relation to common urea. The increasing amount of N resulted in significant increases in rice grain yield (from 3217 to 5548 kg ha-1, 2010/11, and from 3392 to 4560 kg ha-1, 2011/12). The apparent nitrogen recovery rate decreased with the increase in N applied doses.engAcesso Abertohttp://creativecommons.org/licenses/by-nc-nd/4.0/N fertilizerOryza sativaPolymer-coated ureaSlow release fertilizersUrease inhibitorFertilizantes NPolímero revestido de ureiaFertilizantes de liberação lentaInibidor de ureaseArtigo10.14393/BJ-v32n5a2016-33068