Open AccessPerformance of enhanced efficiency nitrogen fertilizers in green‐harvesting sugarcane
Author(s) -
Barth Gabriel,
Otto Rafael,
Mira Acácio B.,
FerrazAlmeida Risely,
Vitti André C.,
Cantarella Heitor,
Vitti Godofredo C.
Publication year - 2020
Publication title -
agrosystems, geosciences and environment
Language(s) - English
Resource type - Journals
ISSN - 2639-6696
DOI - 10.1002/agg2.20015
Subject(s) - urea , chemistry , ammonia volatilization from urea , ammonium sulfate , ammonium nitrate , volatilisation , agronomy , nitrogen , ammonium , yield (engineering) , nitrate , zoology , biology , materials science , organic chemistry , chromatography , metallurgy
Enhanced efficiency fertilizers (EEF) are of interest for sugarcane ( Saccharum spp.) production due to the potential to reduce N losses, and improve crop yield and environmental conditions. This study was conducted to determine the effect of urea with N‐(n‐butyl) thiophosphoric triamide (NBPT) or dicyandiamide (DCD) on NH 3 volatilization and sugarcane yield. The NH 3 volatilization, the foliar concentration of N and S, and yield of stalk and pol were monitored in two field trials testing six N sources (urea; urea + NBPT; urea + DCD; ammonium sulfate [AS]; ammonium nitrate [AN]; ammonium sulfate nitrate), and three N rates (50, 100, and 150 kg ha −1 ). The N losses from urea totaled 22 and 18% in Sites 1 and 2, respectively. Treating urea with NBPT reduced NH 3 volatilization by 60%. Sugarcane yield increased 8.8; 11.6; and 16.0 Mg ha −1 (Site 1), and 4.5, 9.3, and 14.2 Mg ha −1 (Site 2) with the application of 50, 100, and 150 kg ha −1 N as compared to control, respectively. All N sources increased yields, demonstrating similar efficiency for sugarcane production. Green harvesting sugarcane cultivated in sandy soils with low organic matter concentration is highly responsive to N, showing similar efficiency between EEF and conventional N fertilizers.