Densidade, teor de óleo e produtividade de grãos em híbridos de milho

Duarte, Aildson Pereira; Carvalho, Cássia Regina Limonta; Cavichioli, José Carlos

doi:10.1590/s0006-87052008000300026

Cited by 8 publications

(8 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…starch and its ratio of amylose to amylopectin, protein and oil) and their packing within the kernel (14) . Density levels here are in line with those found by Duarte et al (15,16,17) in various corn hybrids grown in Brazil as well as Moore et al (18,19) in the USA. Matin et al (10) showed that in dry seasons density increased while in rainy seasons it decreased.…”

Section: Resultssupporting

confidence: 92%

Chemical and Energetic Content of Corn Before and After Pre-Cleaning

Rodrigues¹,

Stringhini

Ceccantini³

et al. 2015

Ciênc. anim. bras.

View full text Add to dashboard Cite

The poultry industry normally has little control over the raw material that arrives at the processing plant. This experiment aimed to evaluate chemical and energetic quality of corn obtained in a feed mill before and after pre-cleaning. Twenty samples of 30 kg of corn each were taken from trucks delivering corn to the mill. The trucks were then unloaded and the material passed through a pre-cleaning process when another sample was taken. Samples were graded and physical properties evaluated: density (g/L), grain percentages of foreign material, impurities, fragments, broken, soft, insect damaged, fire-burnt, fermented, damaged, cracked and fine particles, as well as chemical composition analysis: Apparent metabolizable energy for poultry (AME), ether extract (EE), crude fiber (CF), starch (STA), water activity (WA), crude protein (CP), digestible and total lysine, methionine, cystine, threonine, tryptophan, valine, isoleucine, leucine, phenylalanine, histidine and arginine. The experiment was a randomized design with two treatments (before and after pre-cleaning) and twenty replications. Data was analyzed using SAS ® and treatment differences obtained using F test. Correlations and principal components were calculated. There was a decrease in density after the pre-cleaning process, which was probably due to the removal of earth and stones rather than grain and its fractions. Significant increases were found for insect damage, fermented and damaged grain while fire-burn was significantly reduced after the pre-cleaning process. Starch increased after pre-cleaning which is a result of contaminants that normally are poor in this carbohydrate, but fiber levels increased too. Apparent metabolizable energy, aminoacids, digestible (P<0.05) and total (P<0.05) histidine, total lysine and methionine (P<0.1) levels were reduced after pre-cleaning. Density was higher when there were fewer impurities such as straw, husk or small grains. Broken corn was positively correlated (P<0.05) with foreign material (0.63) and fragments (0.76), while proportion of damaged corn was positively correlated with foreign material (0.68), fragments (0.58) and broken corn (0.83). In this study, even in samples classified as excellent quality before pre-cleaning, the pre-cleaning process was effective in reducing humidity and water activity which helps control the growth of fungi or other microorganisms. Starch and fiber levels increased after pre-cleaning while apparent metabolizable energy levels was not improved by pre-cleaning.

show abstract

Section: Resultssupporting

confidence: 92%

Chemical and Energetic Content of Corn Before and After Pre-Cleaning

Rodrigues¹,

Stringhini

Ceccantini³

et al. 2015

Ciênc. anim. bras.

View full text Add to dashboard Cite

show abstract

“…The A2555 hybrid showed higher lipid content when compared with 2B587 and 30F98; Somma was intermediate. This was corroborated by DUARTE et al (2008), who found more oil in A2555 than in 30F98. The highest protein percentage was observed in 2B587 during the starch-protein separation stage (starch tables), when some protein decantation occurred along with starch, hampering its washing.…”

Section: Volumetric Mass Determinationsupporting

confidence: 52%

“…This indicates that the semi-dent kernel appearance and lower volumetric mass are not always related to a lower density grain. The volumetric weight is a combination of grain density and the way grains are arranged in the container, while the method of floating grains provides an idea of the relationship between hard and soft endosperms (DUARTE et al, 2008). Table 2, the 2B587 hybrid, which has a dent appearance, presented the highest protein content (9.06%), while Somma, that is more vitreous, presented the lowest (8.21%).…”

Section: Volumetric Mass Determinationmentioning

confidence: 99%

“…Grains with flint appearance (higher density) are preferred due to the fact that they are mistakenly believed to have higher hardness, breakage resistance, and solid contents. However, this evaluation is not appropriate to determine maize quality, resulting in the rejection of high yield potential cultivars for presenting grains of dent appearance or low volumetric mass (DUARTE et al, 2008). Thus, the objective of this study was to verify the influence of the appearance and physical-chemical composition of maize grains on byproduct yields from wet milling.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Physical-chemical characterization and wet milling yield of four maize hybrids

2014

View full text Add to dashboard Cite

The influence of physical-chemical characteristics of maize grains and lactic acid concentrations on byproduct yields, generated by conventional wet milling, was studied during steeping, for four maize hybrids and two lactic acid concentrations (0.55 and 1.00%). For physical-chemical characterization, grain dimensions (length, thickness, and width) were determined, as well as mass of 100 grains, percentage of floating grains, volumetric mass, and centesimal composition. Statistical differences were found for percentage of floating grains (2.33 to 24.67%), volumetric mass (0.814 to 0.850 kg.L-1), mass of 100 grains (0.033 to 0.037 kg), water content (11.86 to 12.20%), proteins (8.21 to 9.06%), lipids (3.00 to 4.77%), and ashes (1.07 to 1.26%). There were no relationships of wet milling yields with maize appearance and physical-chemical characteristics. The addition of 1.00% lactic acid did not statistically improve byproduct yields; however, it favored separation of the grain components.

show abstract

“…There was a gradual and continuous breeding process to increase the GY and their components. The OC in corn kernels is relatively low, generally between 3 and 6%, and most studies indicate that the OC depends more on the plant genotype than on the environment (Duarte et al., 2008; Paes, 2008).…”

Section: Resultsmentioning

confidence: 99%

Influence of agronomic and kernel‐related properties on popping expansion in popcorn

et al. 2021

View full text Add to dashboard Cite

Knowledge about relationships between traits can contribute to raising the efficiency of selection of superior genotypes. The objective of this study was to estimate the correlations, direct and indirect effects of agronomic, chemical and physical traits of kernels on popping expansion (PE) in popcorn (Zea mays L.). The trial was carried out in the 2017/2018 growing season, in Maringá -PR, with 49 treatments, which consisted of 43 popcorn, four flint, and two sweet corn. The trial was arranged in a randomized complete block design with three replications. Multiple agronomic, chemical, physical, and popcorn quality traits were evaluated. Analysis of variance was performed to estimate the coefficients of phenotypic and genotypic correlations and the direct and indirect effects of path analysis. The genotypes were partitioned into genotype within each kernel type (popcorn, flint, and sweet corn) and two more contrasts (popcorn vs. [flint + sweet corn]) and flint vs. sweet corn. Positive phenotypic (.76) and genotypic correlations (.81) between popping expansion and pericarp thickness were detected. Kernel length had negative phenotypic (−.75) and genotypic correlations (−.78) with PE. Path analysis indicated that pericarp thickness has a direct and positive effect on PE and that the observed positive correlation with thermal diffusivity of the kernel pericarp and kernel length can be explained by indirect effects of the pericarp thickness. Evaluating kernel length may be most prudent considering economical and practical constraints to popcorn breeding programs.

show abstract

Densidade, teor de óleo e produtividade de grãos em híbridos de milho

Cited by 8 publications

References 15 publications

Chemical and Energetic Content of Corn Before and After Pre-Cleaning

Chemical and Energetic Content of Corn Before and After Pre-Cleaning

Physical-chemical characterization and wet milling yield of four maize hybrids

Influence of agronomic and kernel‐related properties on popping expansion in popcorn

Contact Info

Product

Resources

About