Placement Effect of Controlled-release and Conventional Urea Blend in Maize. Issue 18 (11th October 2019)

• Record Type: Journal Article
• Authors: Garcia, Pedro Lopes; Sermarini, Renata Alcarde; Trivelin, Paulo Cesar Ocheuze
• Is Part Of: Communications in soil science and plant analysis. Volume 50:Issue 18(2019)
• Page Start: 2321
• Page End: 2329
• Publication Date: 2019-10-11
• Subjects: Fertilizer placement -- nitrogen -- polymer-sulfur coated urea -- salt stress -- Zea mays L.; Soil science -- Periodicals; Plants -- Chemical analysis -- Periodicals; Agricultural chemistry -- Periodicals; 631.405
• DOI: 10.1080/00103624.2019.1659300
• Languages: English
• ISSNs: 0010-3624

Abstract

ABSTRACT: A single application of polymer-sulfur coated urea (PSCU) and conventional urea (U) blends can supply nitrogen (N) throughout the maize ( Zea mays L.) cycle but it could become harmful for plants if not properly placed in the soil due to a possible salt stress which would reduce dry weight (DW) and N uptake (NU) in maize. DW and NU in maize plant as well as soil pH and electrical conductive (EC) were evaluated in a greenhouse pot trial. Treatments consisted of different placements (0.05, 0.1 and 0.15 m below and 0, 0.05 and 0.1 m to the side of seed row) of fertilizers (70%PSCU + 30%U, and 100%U) applied at maize sowing in band at a rate equivalent to 180 kg N ha −1 in a Rhodic Eutrustox soil. Control treatment (without N) was also included. At V7 (vegetative leaf stage 7), N fertilizers placed 0.15 m below of seed row provided higher total DW, total NU, EC and pH (in fertilizer row) than 0.05 m and 0.1 m. 70%PSCU + 30%U provided higher total DW and total NU than 100%U in placement 0 m. In addition, 70%PSCU + 30%U placed 0.1 m to the side of seed row provided lower total NU and EC (in fertilizer row) than 0 m. 70%PSCU + 30%U and 100%U placement can negatively interfere maize in vegetative stage when applied incorporated in band at sowing. The proper placement for this condition was 0.15 m below and 0.1 m to the side of seed row.