Arranjo De Plantas Para Diferentes Híbridos De Milho

Kappes, Claudinei; Andrade, João Antônio da Costa; Arf, Orivaldo; Oliveira, Alessandra Conceição de; Arf, Marcelo Valentini; Ferreira, João Paulo

doi:10.5216/pat.v41i3.9650

Cited by 17 publications

(30 citation statements)

References 13 publications

(22 reference statements)

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“…The proximity between treatments D and H can also be explained because the treatments had the same spacing, where the spacing of 80 cm between rows influenced positively the mass of ear with and without husk, the ear diameter and the number of grains per ear. These results are contrary to those found by Kappes et al (2011), which showed that the use of the reduced spacing (45 cm) was advantageous, increasing corn productivity by 15%, compared to the 90 cm row spacing. However, the row spacing did not significantly influence the mass of 1000 grains and productivity, which together represented 32% of the variation in principal components analysis.…”

Section: Treatmcontrasting

confidence: 99%

“…The use of suitable spacings for each cultivar in each region can increase corn production components and productivity. Despite the advantages of using narrower spacing (Modolo, Carnieletto, Kolling, Trogello, & Sgarbossa, 2010;Lana et al, 2014a), researchers have also demonstrated that corn crops, using spacings of up to 90 cm between rows, presented similar or higher agronomic and productive parameters compared to reduced spacings of up to 40 cm (Deparis, Lana, & Frandoloso, 2007;Kappes et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Multivariate Analysis in Corn Cultivars Productivity Submitted to Fertilizations and Row Spacing

Alves¹,

Peixoto²,

Silva³

et al. 2019

JAS

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The corn crop is important in various contexts of Brazilian agricultural production, both with respect to economic and social factors. The objective was to verify, through multivariate methods, the productive performance of two corn cultivars as a function of three types of fertilizations and two row spacing, identifying the correlation between the variables and the grouping between the evaluated treatments. The experiment was carried out at Experimental Farm Rafael Fernandes, Mossoró, Brazil. It was adopted a randomized block design at 3 × 2 × 2 factorial experiment with four replications, the treatments consisted of three fertilizations (OF: Organic Fertilization; OMF: Organomineral Fertilization and MF: Mineral Fertilization), two cultivars of corn (Bras 3010 and Potiguar) and two row spacing (80 cm and 50 cm). The highest productivity was found with the use of organic fertilization, in the cultivar Potiguar, in the row spacing of 80 cm. The final population, productivity and the mass of 1000 grains were the components that had the most effect in the evaluation of the data set. Each evaluated cultivar responded differently to the fertilizations and spacing evaluated. The agreement between the results of the cluster analysis and the main component analysis with the analysis of variance shows the adequacy of the multivariate statistical techniques used in this research.

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Section: Treatmcontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multivariate Analysis in Corn Cultivars Productivity Submitted to Fertilizations and Row Spacing

Alves¹,

Peixoto²,

Silva³

et al. 2019

JAS

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“…The use of higher plant densities at smaller spacings allows a higher interception of photosynthetically active radiation, promoting higher grain yield (SANGOI et al, 2010). On the other hand, this strategy leads to lodging (KAPPES et al, 2011) and self-shading of plants, with a reduced yield, which can be overcome using plant regulators.…”

Section: Introductionmentioning

confidence: 99%

Yield and Biometric Characteristics of Maize Submitted to Plant Population and Trinexapac-Ethyl Doses

et al. 2019

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The use of plant growth regulators in agriculture can alter the morphology of corn plants, increasing crop yield due to the possibility of increasing the population. This study aimed to evaluate the effects of plant populations associated with trinexapac-ethyl (TE) doses on the biometric characteristics of shoot and grain yield of contrasting corn cultivars regarding plant architecture. Experiments were conducted in the field during two seasons with the hybrids 2B710 HX (flat leaf) and TL Status (erect leaf) in a randomized block design (four replications) and treatments in a 5 × 5 factorial scheme, with five plant populations (40, 60, 80, 100, and 120 thousand plants ha−1) and five TE doses (0, 100, 200, 300, and 400 g a.i. ha−1) applied by foliar spraying at the V6 stage. Plant height, ear insertion height, stem diameter, leaf area index, and grain yield were evaluated. An increment in population increases plant height, ear insertion height, and the leaf area index, but reduces stem diameter. The plant growth regulator TE reduces plant height and ear insertion height. The interaction between plant population and TE favors corn yield, with the highest values observed in combinations of 93.4 thousand plants ha−1 with a dose of 176 g ha−1 of TE for the hybrid 2B710 HX and 92.2 thousand plants ha−1 with a dose of 251 g ha−1 of TE for the hybrid Status TL.

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“…Híbridos de milho modernos apresentam menor porte, menor área foliar e ciclo precoce, que favorece o desempenho produtivo da lavoura, pelo incremento no índice de colheita (Kappes et al, 2011).…”

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Reaplicação De Nitrogênio Na Mitigação Do Efeito Da Desfolha Em Diferentes Fases Fenológicas Do Milho

Barbosa

Zucareli

Tsukahara

et al. 2019

RBMS

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RESUMO - O manejo adequado da adubação nitrogenada para atenuar efeitos da perda de área foliar é uma soluçãopouco explorada. Portanto, objetivou-se avaliar, em campo, o efeito da reaplicação de nitrogênio e intensidade dedesfolha em diferentes fases fenológicas sobre a incidência de grãos ardidos e o desempenho produtivo do milho. Odelineamento experimental foi em blocos casualizados, com quatro repetições, em esquema fatorial 2x7x4+2, sendo,a reaplicação de N em cobertura (0 e 40 kg ha-1), os estádios fenológicos de desfolha (V2, V4, V6, V10, R1, R3 e R5),as intensidades de desfolha (25, 50, 75 e 100%) e dois controles adicionais (0% de desfolha com e sem a reaplicaçãode N). As avaliações realizadas foram percentagem de grãos ardidos, massa de 100 grãos e produtividade de grãos. Osdados foram submetidos à análise de variância, testes de Tukey, Dunnett e regressão até 2º grau (p0,05). A reaplicaçãode nitrogênio após a desfolha atenua os efeitos desse estresse na massa e no rendimento total de grãos, com maiorefetividade quando ocorre nos estádios vegetativos. O prejuízo ao desempenho produtivo em razão da desfolha éacentuado quando ocorre no florescimento e enchimento de grãos, pois desequilibra a relação fonte-dreno. A desfolhaem estádios iniciais proporciona maior intensidade de grãos ardidos nas plantas de milho.Palavras-chave: Adubação nitrogenada, Área foliar, Estádios fenológicos, Zea mays L.REAPPLICATION OF NITROGEN AS MITIGATIONTO THE DEFOLIATION EFFECT AT STAGES OF MAIZEABSTRACT - The proper management of nitrogen fertilization to mitigate the effects of the loss of leaf area ispoorly explored. Therefore, the present study evaluated the effect of nitrogen reapplication and defoliation intensity atdifferent phenological stages on the incidence of rot grains and corn production performance. The experimental designwas a randomized complete block with four replications, in a 2x7x4 + 2 factorial scheme, with the reapplication of Ntopdressed (0 and 40 kg ha-1), the defoliation stages (V2, V4, V6, V10, R1, R3 and R5), defoliation intensities (25, 50, 75and 100%) and two additional controls (0% defoliation with and without reapplication of N). Percentage of rot grains,mass of 100 grains and grain yield were evaluated. Data were subjected to analysis of variance, Tukey’s, Dunnett’s testsand regression up to grade 2 (p 0.05). Reapplication of nitrogen after defoliation attenuates the effects of this stress onthe mass and the total yield of grains, with greater effectiveness in the vegetative stages. The damage to the productiveperformance due to defoliation was accentuated when occurred at the flowering and grain filling as it unbalancesthe source-drain relation. Depletion in the early stages caused higher occurrence of grain burned in maize plants.Keywords: Nitrogen fertilization, Leaf area, Phenological stages, Zea mays L.

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Arranjo De Plantas Para Diferentes Híbridos De Milho

Cited by 17 publications

References 13 publications

Multivariate Analysis in Corn Cultivars Productivity Submitted to Fertilizations and Row Spacing

Multivariate Analysis in Corn Cultivars Productivity Submitted to Fertilizations and Row Spacing

Yield and Biometric Characteristics of Maize Submitted to Plant Population and Trinexapac-Ethyl Doses

Reaplicação De Nitrogênio Na Mitigação Do Efeito Da Desfolha Em Diferentes Fases Fenológicas Do Milho

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