Abstract
It is possible to increase nitrogen for wheat productivity by adjusting the single and fractionated dose based on the condition of the agricultural year. The objective of this work is to study the highest amount of nitrogen used for the production of wheat using single dose or fractionation under favorable and unfavorable cultivation years. The study was conducted in 2012, 2013 and 2014 in Augusto Pestana, Rio Grande do Sul, Brazil. The experimental design was a randomized block in a 4 × 3 factorial scheme with four replications. It consists of N-fertilizer rates (0, 30, 60 and 120 kg ha-1), forms of supply [single (100%), growth stage V3 (third expanded sheet); fractionated (70%/30%) growth stage V3/V6 (third and sixth expanded sheet); fractionated (70%/30%) phonological stage V3/E (third expanded leaf and early grain filling)]. In favorable, intermediate and unfavorable years, wheat cultivated with single dose of nitrogen is more effective than the grain fractionated, regardless of the succession system. Nitrogen use efficiency can be substantially reduced or increased in wheat based on the condition of the year of cultivation and the use of the optimal dose of the nutrient may not necessarily express maximum grain yield with economic efficiency. Key words: Triticum aestivum, relation C/N, meteorological condition, simulation.
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Claims 3
Claim · model-written summary
Single-dose nitrogen was more effective for wheat than fractionated nitrogen in favorable, intermediate and unfavorable years.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- single dose of nitrogene1
- Outcome
- effectivee1
- Direction
- more effectivee1
- Comparator
- grain fractionatede1
- Setting
- favorable, intermediate and unfavorable yearse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In favorable, intermediate and unfavorable years, wheat cultivated with single dose of nitrogen is more effective than the grain fractionated, regardless of the succession system”
Claim · model-written summary
Nitrogen use efficiency in wheat can be substantially reduced or increased depending on the condition of the cultivation year.
- Taxon
- wheatTriticum aestivume2
- Outcome
- Nitrogen use efficiencye2
- Direction
- reduced or increasede2
- Setting
- condition of the year of cultivatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Nitrogen use efficiency can be substantially reduced or increased in wheat based on the condition of the year of cultivation”
Claim · model-written summary
The optimal nitrogen dose may not necessarily give maximum wheat grain yield with economic efficiency.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- optimal dose of the nutriente3
- Outcome
- grain yielde3
- Direction
- may not necessarily express maximume3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the optimal dose of the nutrient may not necessarily express maximum grain yield with economic efficiency”
t0“Wheat yield obtained from nitrogen dose and fractionation”