Single and fractioned supply of nitrogen in wheat productivity
International Journal of Development Research
Single and fractioned supply of nitrogen in wheat productivity
Received 24th March, 2017; Received in revised form 19th April, 2017; Accepted 27th May, 2017; Published online 16th June, 2017
Copyright© 2017, Juliane S. P. Costa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Higher wheat productivitycan be obtained according tothe form of nitrogen supply. The objective of this study wasto increase the biomass and wheat grain productivitythroughthe forms of nitrogen supplyinconditions of favorable and unfavorable years,in corn/wheat and soybean/wheat succession systems. The study was conducted in 2014 and 2015, in randomized block design, with four replicates in a 4 x 3 factorial, for N-fertilizer doses 0, 30, 60, 120 kg ha-1 and nutrient supply forms [single dose 100% at the phenological stage V3 third leaf expanded; fractioned 70 and 30% at the V3/V6 phenological stages third and sixth leaves expanded, respectively and; fractioned 70 and 30% at the V3/R1 phenological stages third leaf expanded and early grain filling], respectively, in soybean/wheat and corn/wheat succession systems. In general, the increase of biomass productivity in wheat can be obtainedthroughthe fractionation in the phenological stage V3/V6, but it is not always accompanied of the highestgrain productivity. Regardlessof the succession system, in favorable years of cultivation, the nitrogen supply in single dose increases grain productivity; in unfavorable years, the nutrient fractionation is more appropriate.
