Open AccessEnhanced Efficiency Fertilizers in Minimizing Nitrogen Losses in Irrigated Russet Potato
Author(s) -
Ghosh Upasana,
Chatterjee Amitava,
HattermanValenti Harlene
Publication year - 2019
Publication title -
agrosystems, geosciences and environment
Language(s) - English
Resource type - Journals
ISSN - 2639-6696
DOI - 10.2134/age2019.06.0047
Subject(s) - urea , ammonia volatilization from urea , chemistry , nitrogen , leaching (pedology) , fertilizer , cultivar , ammonium nitrate , agronomy , solanum tuberosum , ammonia , nitrate , ammonium , horticulture , volatilisation , environmental science , biology , soil water , biochemistry , organic chemistry , soil science
Core Ideas Enhanced efficiency fertilizers significantly reduced cumulative N 2 O emission compared with urea. Volatilization loss was lower with determinate than indeterminate cultivar. SuperU application lead to higher soil N after harvest. Environmentally Smart N can be a potential alternative to urea to increase N use efficiency. Fertilizer‐N can be lost through ammonia (NH 3 ) volatilization, nitrous oxide (N 2 O) emission, and nitrate (NO 3 − ) leaching. Field studies were conducted in 2015 and 2016 at Inkster, ND, to evaluate the effectiveness of enhanced efficiency fertilizers (EEFs) in reducing N losses over urea alone in an irrigated potato ( Solanum tuberosum L.) production system. Research and fertilizer‐N recommendation for potato were mostly restricted to Russet Burbank; it is critical to understand N dynamics of newly released cultivars. Two EEFs (SuperU and Environmentally Smart Nitrogen [ESN]) at a rate of 280 kg N ha −1 , urea at a rate of 225 kg and 280 kg N ha −1 , and Growers’ standard (10–34–0 and urea and urea ammonium nitrate in split) at a rate of 280 kg N ha −1 were applied as N treatments in three russet potato cultivars (Russet Burbank, Dakota Trailblazer, and ND8068‐5 Russ). Urea at 280 kg N ha −1 had the highest NH 3 volatilization and was significantly higher than SuperU and ESN for Russet Burbank and Trailblazer for both years. Both EEFs reduced N 2 O emission compared with urea in both years, but SuperU was more efficient than ESN. Residual NO 3 –N was highest with SuperU both years. Residual soil NO 3 –N concentration of 120 cm depth with ND8068‐5 Russ were significantly higher compared with Russet Burbank in both growing seasons. Application of EEFs might have the potential to reduce N losses under irrigated late‐planted russet potatoes.