A proposal of simulation of wheat grain productivity by nitrogen and meteorological elements
International Journal of Development Research
A proposal of simulation of wheat grain productivity by nitrogen and meteorological elements
Received 05th April, 2017; Received in revised form 29th May, 2017; Accepted 26th June, 2017; Published online 31st July, 2017
Copyright ©2017, Ana Paula Brezolin Trautmann 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.
The development of efficient simulation models can facilitate the crop planning and the crop predictability analysis. The objective of the study is to propose a simulation model of wheat grain productivity by the nitrogen supply management with variables related to the plant and the meteorological elements, in high succession systems and reduced N-residual release. In the study, two experiments were conducted in 2013, 2014 and 2015, one to quantify the biomass productivity and another one to stablish grain productivity. The design was a randomized block with four replicates in factorial 4 x 3, for N-fertilizer doses (0, 30, 60, 120 kg ha-1) and nutrient supply forms [single condition (100%) at the phenological stage V3 (third leaf expanded); fractionated, (70 and 30%) in the phenological stage V3/V6 (third and sixth leaf expanded); fractionated (70 and 30%) in the phenological stage V3/E (third leaf expanded and in the beginning of grain filling)], and respectively, in soy/wheat and corn/wheat systems. The proposed model that interacts polynomial regression with multiple linear regression is efficient in the simulation of wheat grain productivity in the single and fractionated supply of nitrogen with weather elements in the systems of high and low release of N-residual.
