scholarly journals Urease inhibitor on performance of corn hybrids in second crop in Sinop-MT

2020 ◽  
Vol 13 (6) ◽  
pp. 40
Author(s):  
C. S. Pereira ◽  
G. Wiest ◽  
I. V. A. Fiorini ◽  
M. Schoffen ◽  
V. H. Zanetti ◽  
...  
Keyword(s):  
Experimental Design ◽  
Urease Inhibitor ◽  
Agronomic Performance ◽  
Corn Hybrids ◽  
Corn Crop ◽  
Principal Source ◽  
Nitrogen Supplies

Nitrogen is the most demanded element with the most complex management and with the highest responses in productivity in the corn crop, of the principal source of nitrogen supplies, but the urea is inefficient due to its volatilization. The objective of this work was to evaluate the agronomic performance and the efficiency of the urease inhibitor in formulations containing urea, applied in five different commercial corn hybrids in Sinop - MT. The experimental design was in randomized blocks, in a 3 x 5 factorial scheme with three replications. The first factor consisted of three cover fertilizations: control (without application of fertilizer); fertilization with 250 kg ha-1 of urea and fertilization with 250 kg ha-1 of urea with the presence of the urease inhibitor (UREMAX®) NBPT. The second factor was five corn hybrids: 2B433, DKB255, DKB335, NS45 and SYN522. It was found that all hybrids had greater growth and productivity when they received the urease inhibitor, in relation to the treatment without coverage. The hybrids DKB 255, 2B433 and SYN 522, the treatment with UREMAX® reached the highest productivity. The most prominent hybrid in productivity was DKB 255, which reached 9600 kg ha-1, with UREMAX® in cover fertilization, about 31% more than the treatment without urea coverage, and with gains of 18% in relation to urea.

scholarly journals Agronomic Performance of Corn Cultivars in Low-Altitude in the Cerrado-Amazon Ecotone

2020 ◽  
pp. 126-133
Author(s):  
Weder Ferreira dos Santos ◽  
Lara Rythelle Souza Bequiman ◽  
Lucas Carneiro Maciel ◽  
Joênes Mucci Peluzio ◽  
Osvaldo José Ferreira Júnior ◽  
...  
Keyword(s):  
Experimental Design ◽  
Grain Yield ◽  
Plant Height ◽  
Agronomic Performance ◽  
Grain Production ◽  
Open Pollination ◽  
The South ◽  
Corn Hybrids ◽  
Ear Height ◽  
Low Altitude

e of this study was to evaluate the agronomic performance of corn cultivars for grain production in the south at low altitude in the Cerrado-Amazon ecotone. Place: The research was carried out at Sítio Vitória (8°18'32.0"S, 50°36'58.0"W, 278 MASL), in the south of the state of Pará, Brazil. Study Design: The experimental design was randomized blocks with twelve treatments and three replications. The treatments were eight corn hybrids: AG 1051, AG 8088, BM 3051, BR 2022, BR 205, BR 206, BRS 3046 and PR 27D28; and four open pollination populations: AL BANDEIRANTE, ANHEMBI, CATIVERDE and M 274. Methodology: Sowed on January 28, 2019. The following characteristics were evaluated: ear height, plant height, number of grains per row, ear diameter, ear length, ear weight and grain yield. Results: The cultivars showed a difference for all traits. The grain yield of the cultivars ranged from 4,567 kg ha-1 (BR 205) to 9,450 kg ha-1 (AG 1051). Conclusion: The hybrids AG 1051 and BM 3051 were the ones that stood out the most, had the best performance in the Cerrado-Amazon ecotone.

scholarly journals RESPONSE OF SENSITIVE CORN HYBRIDS TO THE ASSOCIATION OF NICOSULFURON AND TIMING OF NITROGEN APPLICATION

2019 ◽  
Vol 17 (2) ◽  
pp. 27
Author(s):  
Heitor Franco de Sousa ◽  
Paulo César Timossi ◽  
Antônio Paulino da Costa Netto ◽  
Claudio Hideo Martins Costa
Keyword(s):  
Grain Yield ◽  
Correlation Coefficients ◽  
Nitrogen Fertilizers ◽  
Nitrogen Application ◽  
Corn Hybrids ◽  
Corn Crop ◽  
Coated Urea ◽  
The One

Nicosulfuron is an herbicide used in corn crop for controlling weeds, some hybrids are sensitivity to nicosulfuron even more when it is applied near to the application of nitrogen fertilizers. Thus, this study aimed to evaluate the response of sensitive corn hybrids to association of urea and coated urea applied near to nicosulfuron application on V4 corn stage. P 3646 hybrid was the most sensitive, and urea and coated urea applied near to nicosulfuron had significant effect on corn growth for all hybrids. Most hybrids showed high or significant (p < 0.10) correlation coefficients for grain yield, cob length and row per ear. SYN 7341 hybrid was the one that showed better results in grain yield with urea and nicosulfuron combination. Coated urea should not be applied after V8corn stage when nicosulfuron is applied at V4.

scholarly journals EFFECT OF ROOSTER TREE GREEN MANURE ON CARROT AND LETTUCE INTERCROPPING SYSTEM

2018 ◽  
Vol 31 (3) ◽  
pp. 551-559 ◽  
Author(s):  
RICARDO CARLOS PEREIRA DA SILVA ◽  
FRANCISCO BEZERRA NETO ◽  
MAIELE LEANDRO DA SILVA ◽  
AURÉLIO PAES BARROS JÚNIOR ◽  
ANTÔNIO EWERTON DA SILVA ALMEIDA ◽  
...  
Keyword(s):  
Experimental Design ◽  
Green Manure ◽  
Cropping System ◽  
Agronomic Performance ◽  
Productive Performance ◽  
Tree Biomass ◽  
Agronomic Efficiency ◽  
Green Manuring ◽  
Increase Productivity

ABSTRACT Intercropping is a cropping system that involves cultivating two or more crops in the same area with different cycles and vegetative architectures. One of the ways to increase productivity and efficiency in this cropping system is through green manuring and by properly considering crop combinations, cultivation timing, and planting configuration of the component crops. Thus, the aim of this study was to evaluate the productive performance of carrot and lettuce intercropping systems under different amounts of rooster tree biomass incorporated into the soil and under different spatial arrangements. The study was conducted at the experimental farm Rafael Fernandes, RN, Brazil, in the period from September 2012 to January 2013, in an experimental design of randomized complete blocks in a 4 x 3 factorial scheme, with twelve treatments and 3 replicates. The treatments consisted of the combination of four rooster tree biomass amounts incorporated into the soil (10, 25, 40 and 55 t ha-1 on a dry basis) with three predetermined spatial arrangements between the component crops (2:2, 3:3 and 4:4), which correspond to the rows of carrot alternating with the rows of lettuce. The agronomic performance of the carrot and lettuce intercropping system was optimized in the amount of approximately 46.36 t ha-1 of rooster tree incorporated into the soil. There was no influence of the spatial arrangements on the agronomic efficiency of the carrot and lettuce intercropping. The use of rooster tree as green manure is agronomically viable in intercropped systems of carrot and lettuce.

scholarly journals Agronomic Performance and Genetic Divergence in Corn (Zea mays) in the Cerrado-Amazon Ecotone

2019 ◽  
pp. 1-7
Author(s):  
Rafael Marcelino Da Silva ◽  
Weder Ferreira dos Santos ◽  
Matheus Rodrigues de Andrade ◽  
Zildiney Dantas Da Silva ◽  
Layanni Ferreira Sodré Santos ◽  
...  
Keyword(s):  
Zea Mays ◽  
Experimental Design ◽  
Grain Yield ◽  
Plant Height ◽  
Genetic Divergence ◽  
Optimization Method ◽  
Multivariate Model ◽  
Agronomic Performance ◽  
Ear Height ◽  
Generalized Distance

The objective of this work is to study the agronomic performance and genetic divergence in corn in the Cerrado-Amazon ecotone. The trials were conducted in the 2017/18 harvest at a property in the state of Pará. The experimental design was a randomized block with nine treatments and three replications, where the treatments are represented by nine cultivars of corn. The characteristics to evaluate agronomic performance and genetic divergence were: ear height (cm), plant height (cm), ear length (cm), ear diameter (mm), number of rows, number of grains per row and grain yield (kg ha−1). The cultivars were separated into a multivariate model in five groups using the Tocher optimization method. The cultivar AG 1051 showed the best agronomic performance. The results of genetic divergence were according to the generalized distance of Mahalanobis (D2), with the commences AG 8088 x CATIVERDE and AG 1051 x AL BANDEIRANTE, the most promising for future crosses.

scholarly journals Agronomic performance and stability and of grain yield of f2 populations maize hybrids

2020 ◽  
Vol 13 (9) ◽  
pp. 1
Author(s):  
C. S. Bernini ◽  
P. S. Guimarães
Keyword(s):  
Experimental Design ◽  
Agronomic Traits ◽  
Agronomic Performance ◽  
Breeding Programs ◽  
Maize Hybrids ◽  
Maize Populations ◽  
Wide Range ◽  
Significant Difference ◽  
Different Types ◽  
Productive Potential

In Brazil, corn is grown in a wide variety of environments, investments and technologies, requiring the development of different types of hybrids. Breeding programs aim to identify genotypes with productive potential combined with better adaptation and stability. The objective of this work was to evaluate 28 hybrids of F2 maize populations, obtained from a complete diallel, together with the eight parent F2 populations and two commercial witnesses, regarding the main agronomic traits: male flowering (FM), plant height and ear ( AP and AE) and grain mass (MG) and estimate the parameters of adaptability and stability. The experiments were developed in 2008/2009 and 2009/2010, in three locations in the State of São Paulo (Campinas, Mococa and Palmital) and the experimental design used was the randomized blocks with three replications. Individual and joint analyzes of variance were performed, the means being grouped by the Scott-Knott test and the parameters of adaptability and stability estimated by the methods of Eberhart and Russell (1966) and Annicchiarico (1992). There was a significant difference (P <0.01) for treatments, locations and interaction between treatments in all evaluated characters. The average for MG was 7,515 kg ha-1, highlighting the hybrid P4 x P1 with MG of 9,095 kg ha-1. The average of hybrids was 40.5% higher than that of parental F2 populations. The hybrids of F2 populations differ in terms of adaptability and stability for MG, with the majority of hybrids (82%) showing general adaptability. The P4xP1 and P4xP2 hybrids are superior to MG and are promising for recommendation in a wide range of environments.

scholarly journals DEVELOPMENT OF CORN HYBRIDS (Zea mays) UNDER INOCULATION OF DIAZOTROPHIC BACTERIA AND NITROGEN FERTILIZATION

2019 ◽  
Vol 17 (1) ◽  
pp. 71
Author(s):  
João Paulo Kruger Reznick ◽  
Volnei Pauletti ◽  
Daniel Malheiro Nascimento ◽  
Marcus Vinicius Cremonesi
Keyword(s):  
Zea Mays ◽  
Experimental Design ◽  
Factorial Design ◽  
Chlorophyll Content ◽  
Nitrogen Fertilization ◽  
Azospirillum Brasilense ◽  
Dry Mass ◽  
Diazotrophic Bacteria ◽  
Corn Hybrids ◽  
Leaf Chlorophyll

<br /><table class="data" width="100%"><tbody><tr valign="top"><td class="value">The aim of this work was to evaluate the development of corn genotypes under the effect of inoculation with <em>Azospirillum brasilense</em> in association with nitrogen fertilization. The experimental design was completely randomized in a factorial design (5x2x2) with three replications. Five corn hybrids were used, combined with two doses of nitrogen (N) (without N and with 100 kg ha<span>-1</span> N) and with two inoculation levels of <em>A.brasilense</em> (without and with inoculation). Plant stature and stem diameter at stadiums V8 and R1, leaf chlorophyll content at stadium R1 and dry mass at stadium R2 were evaluated. It was observed that when there was variation in the evaluated parameters, this was due to the different genetic materials and mainly due to the application of N. Inoculation with <em>A.brasilense</em> was not effective in altering the corn development.</td></tr></tbody></table>

scholarly journals Competition of onion genotypes in the soil and climatic conditions of Guarapuava, State of Paraná

2021 ◽  
Vol 43 ◽  
pp. e53105
Author(s):  
Marcela Padilha Iastremski ◽  
Juliano Tadeu Vilela de Resende ◽  
Cristhiano Kopanski Camargo ◽  
Marcos Guilherme Ruthes ◽  
Marco Antonio Pereira Santos
Keyword(s):  
Experimental Design ◽  
Climatic Conditions ◽  
Early Flowering ◽  
Agronomic Performance ◽  
Productive Performance ◽  
Yield And Quality ◽  
Experimental Area ◽  
Commercial Cultivars ◽  
Total Productivity

The use of genotypes more adapted to climatic conditions can contribute to increase the yield of onion producers. The goal of this study was to evaluate the agronomic performance of 15 onion genotypes in the soil and climatic conditions of Guarapuava, state of Paraná. The study was conducted in the experimental area of Horticulture, Cedeteg campus, Universidade Estadual do Centro-Oeste (UNICENTRO), Guarapuava, state of Paraná, Brazil, from July to November 2018. The experimental design used was randomized blocks, with four replications, and the treatments consisted of four commercial cultivars Optima F1, Bella Dura, Sirius F1, Soberana F1 and eleven experimental genotypes N1, N2, N3, N4, N5, N6, N7, N8, N9, AF4241 and AF4243. Biometric characteristics of the plants, production components and early flowering were evaluated. Plants presented between 6 and 9 leaves, in which N1, N3, N4 and N6 had less than 7 leaves, differing statistically from the others. The cultivar Optima F1 and the genotypes N2, N3, N5, N6, N7 and N8 presented the tallest plants, with 66.1 to 76.0 cm. The pseudostem diameter did not differ significantly between genotypes, showing values between 15.2 and 20.4 mm. Total productivity was higher in genotypes N2, N6, N5, N4, N3, N7 with values from 43.6 to 50.3 t ha-1. The highest average bulb mass was found in N2, N4, N6, Sirius F1, Optima F1 and Soberana F1, with 74.2 to 91.1 g bulb-1. Regarding the commercial classification, the genotypes N2, N4, N5, N6 and the cultivars Sirius F1 and Soberana F1 presented more than 50% bulbs of classes 3+3C+4. Early flowering did not occur in any of the analyzed genotypes. The use of cultivars with high productive performance and adapted to climatic conditions, when handled properly, can result in greater yield and quality of bulbs.

scholarly journals PLANTAS DE COBERTURA SOBRE ATRIBUTOS AGRONÔMICOS DO MILHO NA REGIÃO SUDOESTE DA AMAZÔNIA

2016 ◽  
Vol 15 (3) ◽  
pp. 531 ◽  
Author(s):  
ANDRÉIA MARCILANE AKER ◽  
ALEXANDRE MARTINS ABDÃO DOS PASSOS ◽  
ALAERTO LUIZ MARCOLAN ◽  
FLÁVIA CRISTINA DOS SANTOS ◽  
HENRIQUE NERY CIPRIANI ◽  
...  
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Cover Crops ◽  
Biomass Yield ◽  
Amazon Region ◽  
Leaf Nitrogen Content ◽  
Agronomic Performance ◽  
No Till ◽  
Corn Crop ◽  
Corn Plants

RESUMO – O sistema plantio direto é uma estratégia sustentável de produção que preconiza a manutenção da cobertura vegetal como prática conservacionista do solo. Objetivou-se avaliar o efeito de plantas de cobertura sobre atributos fisiológicos e agronômicos do milho na região sudoeste da Amazônia. Foram avaliadas 15 estratégias de sucessões de culturas com o milho e a influência sobre o rendimento de biomassa, de grãos, altura de plantas e inserção da espiga, índice de espiga, massa de 100 grãos, teor foliar de nitrogênio e clorofilas total, a e b em plantas de milho. Observou-se efeito das plantas de cobertura sobre o rendimento de grãos, de biomassa fresca e seca, na massa de grãos e nos teores de clorofila. Os efeitos sobre os teores de clorofila foram mais pronunciados na clorofila b e nos estádios fenológicos finais da cultura. O feijão-de-porco promoveu as maiores produtividades de grãos (7.539,3 kg ha-1) e potencial de silagem (16,2 Mg ha-1 de biomassa seca). A adequada escolha das espécies que compõe um sistema de plantio direto é preponderante para o apropriado desempenho agronômico do milho na região sudoeste da Amazônia.Palavras-chave: Zea mays, intensificação ecológica, sustentabilidade, integração lavoura-pecuária, plantio direto.CROPPING SYSTEMS ON THE PERFORMANCE OF CORN PLANTS IN THE SOUTHWESTERN AMAZONABSTRACT- A sustainable strategy for agricultural systems is the use of cover crops in no-tillage systems, as a conservationist soil practice. This paper aimed to evaluate the short-term effects of different cover crops on some physiological and agronomic attributes of corn crop in the Southwestern Amazon region. The effects of 15 cover plants on the biomass and grains yield, plant height, ear insertion height, ear index, mass of 100 grains, leaf nitrogen content and a, b and total chlorophyll levels of corn plants were evaluated. A randomized complete block design was used with four replications. Grain yield, fresh and dry biomass yield, mass of 100 grains and chlorophyll content were affected by some cover crops. Jack bean promoted the highest grain yield (7,539.3 kg ha-1) and biomass yield (16.2 Mg ha-1 dry matter) among the options assessed. Cover crops provided different levels of total, a and b chlorophyll levels, on the corn plants. Some cover crops presented the potential to improve the agronomic performance of the succeeding corn crop in the Southwestern Amazon region. The proper agronomic performance of corn in a no-till system depends on the adequate choice of cover plants to compose the system.Keywords: Zea mays, ecological intensification, sustainability, crop-livestock system, no-till.

scholarly journals Control of Dichelops melacanthus with insecticides associated with sulphur applied in different times in corn

2017 ◽  
Vol 10 (1) ◽  
pp. 67
Author(s):  
J. C. Guerreiro ◽  
G. B. Silva ◽  
A. P. Azevedo ◽  
R. R. Espessato ◽  
A. T. Padovan ◽  
...  
Keyword(s):  
Experimental Design ◽  
Analysis Of Variance ◽  
Initial Phase ◽  
Stink Bug ◽  
Stink Bugs ◽  
F Test ◽  
Visual Evaluation ◽  
Corn Crop ◽  
Important Pest

The stink bug Dichelops melacanthus has become an important pest for corn crop and it has been causing several losses even in the initial phase of the crop. The objective of the experiment was the evaluation of effectiveness of the insecticides on the control of D. melacanthus in corn by adding of sulfur or not, in different control times. In order to evaluate the effect of the insecticide by adding or not sulfur on the control of D. melacanthus, 17 treatments with 4 different insecticides (with and without sulfur, in two different control times plus control) were used to get the results. The experimental design used was the randomized blocks, with four repetitions. The evaluation of effectiveness on stink bugs control was gotten by visual evaluation of the symptoms at 6, 13 and 20 days after emergence (DAE). Analysis of variance by F test (Anova) was done and the averages compared through Scott-knott test (p≤0,05). The pulverization of insecticides was more effective when it was done 4 (DAE), reducing the symptoms and injuries occasioned by the stink bug D. melacanthus and the mortality of damaged plants. The insecticide bifentrina+carbosulfano showed the higher effectiveness on stink bug control. To conclude, the use of sulfur associated to insecticides did not present a significant effect.

scholarly journals Effect of Artificial Defoliation in Different Levels on Agronomic Characteristics in Corn Culture

2017 ◽  
Vol 10 (1) ◽  
pp. 336
Author(s):  
Vitor Gustavo Kuhn ◽  
Jonas Kestring ◽  
Carlos Alberto Pagnoncelli ◽  
Jaqueline De Araujo Barbosa ◽  
Neusa Kuhn ◽  
...  
Keyword(s):  
Experimental Design ◽  
Reproductive Stage ◽  
Agronomic Characteristics ◽  
Corn Crop ◽  
Significant Difference ◽  
Spike Number ◽  
Corn Plants ◽  
Almost All ◽  
Upper Third ◽  
Different Levels

The objectives of the present work were to evaluate the effects caused by defoliation at different levels in the corn crop, evaluating the agronomic characteristics and yield of maize. The experiment was conducted in the period from September to January, harvest 2016/2017. The experimental design was a randomized block, consisting of five treatments composed of different levels of defoliation of corn plants with four replicates: T1: Witness, without defoliation of plants; T2: Removal of all leaves of the plant; T3: leaves only in the lower third of the plant; T4: Leaves only in the middle third of the plant; T5: Leaves only in the upper third of the plant. Defoliation procedures were performed at the beginning of the VT reproductive stage of maize. The following parameters were evaluated: Spike insertion height; Diameter of the stem; Ear length; Spike diameter; Number of rows of grains on the spike; Number of grains in row; Final Productivity; Weight of a thousand seeds. The results were significant in almost all analyzed variables, where superior results were obtained by the T1 control, followed by T4. It was concluded that the best results were obtained by the control in which there was no defoliation, but there was no significant difference with the results obtained by the treatment in which there were only leaves in the middle third of the plant. From these results it can be affirmed the great importance of the median leaves above and below the spike insertion.

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