Simulação da Necessidade Hídrica e Estimativa de Produtividade para Cultura do Milho em Municípios do RS

Köpp, Luciana Marini; Peiter, Márcia Xavier; Ben, Luis Humberto Bahú; Nogueira, Helena Maria Camilo de Moraes; Padrón, Richard Alberto Rodríguez; Robaina, Adroaldo Dias; Buske, Taise Cristine

doi:10.18512/1980-6477/rbms.v14n2p235-246

Cited by 14 publications

(13 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Kopp et al (2015) studied four sowing dates between 1992 to 2012 in three municipalities of RS, and concluded an average water supplement of 393 mm was needed for maize, based on an average reduction of 55.2% in grain yield during the study period. As such, supplementary water was emphasized as one of the techniques necessary to stabilize the production of maize (MINUZZI; RIBEIRO, 2012).…”

Section: Introductionmentioning

confidence: 99%

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

et al. 2016

View full text Add to dashboard Cite

-This study assessed the effect of different irrigation levels and plant densities on maize crops cultivated during the second season in the Western Border region of the State of Rio Grande do Sul. This work was conducted at the Federal Institute of Farroupilha -Alegrete Campus/RS -between January and June 2014. Treatments were arranged in a completely randomized 5 × 4 factorial design, with 3 replicates each. Irrigation of fixed amounts of water that were based on the evapotranspiration of the culture (Et c ): 0, 50, 75, 100, and 125% of Et c were applied at 5-day intervals. Four densities of plants were defined (4, 7, 10, and 13 plants m -2 ). We assessed number of maize ears per plant, number of grains per ear, aboveground dry matter, mass of 100 grains, harvest index, and grain productivity. The number of grains per ear, mass of 100 grains, and grain yield were influenced by irrigation levels. Plant density and water depth influenced the number of grains per ear, the mass of 100 grains, and grain productivity. The highest yield of winter maize grain was achieved with a combination of 13 plants per m -2 and an irrigation level of 100% of Et c . Specific densities of plants maximized the yield of maize at each irrigation level, demonstrating that choice of plant density is a critical variable in the second crop of maize, and significantly influences the components of production.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In the same locality, applying supplementay irrigation depths in maize, Pegorare et al (2009) observed that a 510 mm depth increased productivity by up to 130% in relation to the rainfed growth. To test for differences between the water demands of the corn crop in Bagé, Santa Maria and Uruguaiana, Rio Grande do Sul State, at different growing seasons, Kopp et al (2015) verified demands in the order of 531 to 735 mm. Souza et al (2012), in Seropédica, Rio de Janeiro State, observed that, after selection of different cropping systems, "Eldorado" maize cultivar had a total water consumption of 394.1 mm.…”

Section: Resultsmentioning

confidence: 99%

Estimation of second season maize yield loss by the spatial variability of the soil physical-water properties

Sobenko¹,

Armindo²,

Wolff³

et al. 2018

Biosci. J.

View full text Add to dashboard Cite

Irrigation systems are still traditionally dimensioned and managed considering that the cultivated area is homogeneous, thereby not taking into account the spatial variability of soil physical and hydraulic parameters, potentially limiting productivity. The aim of this work was to estimate the yield losses of second season maize crops when comparing the application of constant and variable complementary irrigation depths along the area, in scenarios with distinct rainfall indices, for an irrigated area in the state of Mato Grosso, Brazil. Data of the soil parameters bulk density (ρ b) and available water capacity (AWC) were analysed and maps of spatial variability were generated using geostatistical tools. In the sequence, water balance for the average values of ρ b and AWC and individual water balances for each pixel generated in the interpolations were determined, allowing the estimation of production losses due to the application of water depths. The water demand of the second season maize was estimated with precision for the three scenarios studied. Traditional irrigation management resulted in deficit areas and excessive depths up to 54 mm for both cases, leading to a reduction in productivity of up to 12.5%.

show abstract

“…Em sequencia, na Figura 2, a evapotranspiração da cultura (ETc) atingiu maior valor acumulado de 591 mm em 15-nov, tal fato deve-se maior disponibilidade de energia associada a maior disponibilidade de água no solo. No Rio Grande do Sul, KÖPP et al (2015), também relacionaram a maior evapotranspiração do milho como consequências das maiores temperaturas e maior insolação quando avaliadas no município de Uruguaiana. A maior necessidade de água via irrigação foi observada em 15 de novembro, quando totalizou 251,2 mm de água aplicada.…”

Section: Resultsunclassified

“…A medida que ocorre o atraso da semeadura, a ETc aumenta, totalizando 620 mm em 15 de novembro, com intervalo de confiança, variando de 572,4 mm a 608,6 mm, evidenciando a variabilidade da disponibilidade hídrica nas datas de semeadura. KÖPP et al (2015), encontraram 654 mm de evapotranspiração média no ciclo, com intervalo de consumo hídrico de 531 a 735 mm.…”

Section: Resultsunclassified

Estimativa Das Necessidades Hídricas Do Milho Cultivado Nas Condições Edafoclimáticas De São Mateus – Es

Sales¹,

Louzada²,

Oliveira³

et al. 2016

Encicl. Biosf.

View full text Add to dashboard Cite

RESUMOA água é um recurso que limita muito a produtividade do milho na região norte do Espírito Santo. O objetivo do trabalho foi estimar a precipitação efetiva, evapotranspiração da cultura, lâmina de irrigação e quebra de produtividade da água no cultivo do milho na região de São Mateus -ES, para diferentes épocas de semeadura. Para identificar o requerimento de água para o milho, foi utilizado o programa CROPWAT 8.0, que calcula o balanço hídrico da cultura a partir de dados climáticos, de solo e da espécie cultivada. Os resultados mostraram que o CROPWAT recomendou o uso de irrigação nas nove datas de semeadura investigadas. No entanto, a antecipação da data de semeadura para 01/09, 15/09 e 1/10, possibilitará menores lâminas de irrigação suplementar e menor quebra de produtividade de água no cultivo do milho na região. PALAVRAS-CHAVE: Clima, solo, evapotranspiração, quebra de produtividade ESTIMATED NEEDS WATER MAIZE IN THE EDAFOCLIMATIC CONDITIONS OF SÃO MATEUS -ESABSTRACT Water is a resource that greatly limits the productivity of maize in the northern region of the Espírito Santo. The objective was to estimate the effective precipitation, evapotranspiration, water depth and water productivity drop in corn cultivation in the region of São Mateus -ES to different sowing times. For identify the water requirement for corn was used CROPWAT 8.0 software, which calculates the water balance of culture from climatic, soil and cultivated species. The results showed that the CROPWAT recommended the use of irrigation while the nine investigated sowing dates. However, early sowing date for 01/09, 15/09 and 1/10 enable smaller blades of supplemental irrigation and break water productivity in maize cultivation in the region.

show abstract

Simulação da Necessidade Hídrica e Estimativa de Produtividade para Cultura do Milho em Municípios do RS

Cited by 14 publications

References 2 publications

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

Estimation of second season maize yield loss by the spatial variability of the soil physical-water properties

Estimativa Das Necessidades Hídricas Do Milho Cultivado Nas Condições Edafoclimáticas De São Mateus – Es

Contact Info

Product

Resources

About