10.6084/m9.figshare.8162537.v1
Aildson Pereira Duarte
Aildson Pereira
Duarte
Mônica Ferreira de Abreu
Mônica Ferreira de
Abreu
Eros Artur Bohac Francisco
Eros Artur Bohac
Francisco
Douglas de Castilho Gitti
Douglas de Castilho
Gitti
Gabriel Barth
Gabriel
Barth
Claudinei Kappes
Claudinei
Kappes
Reference Values of Grain Nutrient Content and Removal for Corn
SciELO journals
2019
corn grains
mineral nutrient contents
grain yield
grain density
2019-05-22 02:44:44
Dataset
https://scielo.figshare.com/articles/dataset/Reference_Values_of_Grain_Nutrient_Content_and_Removal_for_Corn/8162537
<div><p>ABSTRACT: Unchanged reference values of grain nutrient contents for corn have been used for over 20 years, despite yield increases, the development of new hybrids, and modifications to cropping systems, especially the establishment of in-season second crops and the wide adoption of no-tillage. This study measured macro- and micronutrient contents in corn grains from different regions, in the first (summer) and second (fall) crop, to update the reference values of estimated nutrient removal. A secondary objective was to determine whether there were correlations between grain nutrient contents and grain yields and densities. In this study, 175 corn grain samples of experiments on cultivar evaluation and 22 samples from soil management trials from five states (SP, PR, MG, MT, and MS) were used. Grain nutrient contents were ranked as follows: N > K > P > Mg > S (g kg−1) and Ca > Zn > Fe > Mn > B > Cu (mg kg−1). Content values for half of the nutrients analyzed were negatively correlated with yield and/or seed weight, whereas grain density was not correlated with nutrient contents. For the first crop of corn, the N, S, and Cu contents clearly decreased with increases in grain yield and seed weight, indicating a lower nutrient removal at higher yields. The great variability of results among environments makes it difficult to differentiate between the first and second crop of corn. The reference values currently in use overestimate the removal of N, P, K, Ca, Mg, S, and Zn grain contents, but underestimate Cu and B in corn. The results of this study can be used to update the reference values of nutrient contents of corn grains to better estimate nutrient removal from the soil.</p></div>