Parâmetros Fisiológicos e Produtividade de Espigas Verdes de Milho sob Diferentes Lâminas de Irrigação

Nascimento, Fábio Nunes do; Bastos, E. A.; Cardoso, M. J.; Júnior, A. S. Andrade; Ribeiro, V. Q.

doi:10.18512/1980-6477/rbms.v14n2p167-181

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…Under the influence of the applied water regimes, the chlorophyll index reached the highest value when 50% of the ETc was used, in relation to the other regimes, showing that under the conditions of the present study the water deficit did not negatively affect this variable (Figure 10B). The opposite result to that of a study by [56], who found a reduction in the chlorophyll index following a reduction in the irrigation depth, for five irrigation depths at different sampling times.…”

Section: Source Ofcontrasting

confidence: 99%

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Sousa¹,

Sousa²,

Viana³

et al. 2023

Preprint

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The use of plant growth-promoting bacteria can be one option for mitigating the impact of abiotic constraints on different cropping systems in the tropical semi-arid region. The aim of this study was to evaluate growth, leaf gas exchange and yield in maize inoculated with Bacillus aryabhattai, and subjected to water and salt stress. The experiment followed a randomised block design, in a split plot arrangement, with six repetitions. The plots comprised two levels of electrical conductivity for the irrigation water (ECw): 0.3 dS m-1 and 3.0 dS m-1; the subplots consisted of three irrigation depths (ID1: 50%, ID2: 75%, and ID3: 100% of the crop evapotranspiration (ETc)); while the sub-subplots included the presence or absence of Bacillus aryabhattai inoculant. A water deficit of 50% of the ETc resulted in the principal negative effects on growth, reducing the leaf area and stem diameter. The use of Bacillus aryabhattai mitigated salt stress and promoted better leaf gas exchange by increasing the CO2 assimilation rate, stomatal conductance, and internal CO2 concentration. However, irrigation with brackish water (3.0 dS m-1) reduced the instantaneous water use efficiency of the maize. Inoculation partially reduced the effects of abiotic stress due to morpho-physiological traits, and increased yield potential under water deficit with no salt stress.

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Section: Source Ofcontrasting

confidence: 99%

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Sousa¹,

Sousa²,

Viana³

et al. 2023

Preprint

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“…O valor máximo obtido aos 59 DAE oscilou entre 0,55 (1,0 m* 1,0 m) e 3,04 (0,50 m * 0,25 m). Nascimento et al (2015), em estudo sobre a influência de lâminas de irrigação sobre parâmetros fisiológicos no milho verde para a mesma cultivar em estudo, obtiveram resultados semelhantes a este trabalho, com valores médios de IAF variando de 1,94 a 3,70 aos 58 dias após semeadura (DAS).…”

Section: Resultsunclassified

“…Por outro lado, Nascimento et al (2015), na região de Teresina -PI, obtiveram produtividade média de espigas verdes despalhadas de 8.465,62 Kg ha -1 com estande de 50.000 plantas ha -1 , efetuando duas adubações de cobertura a primeira por ocasião da sexta folha completamente desenvolvida e a segunda pela oitava folha completamente desenvolvida. Quando comparado ao presente estudo, representou decréscimo de 27% na produtividade (6.167 Kg ha -1 ) para a densidade de 40.000 plantas ha -1 (E P 0,50 * E L 0,50 m).…”

Section: Resultsunclassified

Produtividade Do Milho Verde Irrigado Por Gotejamento Na Amazônia Ocidental

Gundim¹,

Conceição²,

Nogueira³

et al. 2019

Enci Bio

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Irrigating the corn crop and marketing it still green has been an alternative to farmers to increase their income. The objective of the research was to evaluate the yield of green maize drip irrigated at different planting spacings. The experiment was conducted in the experimental area of the Federal University of Acre, Rio Branco/AC. The experimental design was in randomized blocks, being 5 treatments and 5 replicates). The treatments corresponded to planting spacings between lines (E L) and between plants (E P

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“…However, Sangoi et al (2012) and Kolling et al (2016) did detect significant differences in maize yield when comparing different plant distributions. These different findings in the literature can be attributed to meteorological variations between agricultural years, especially in conditions of irregularly distributed rainfall during the crop cycle (Sangoi et al, 2011), or water deficit conditions (Nascimento et al, 2015). Leaf area index (LAI) of maize subjected to four spatial variation distribution in the sowing line for several days after the emergence of the crop.…”

Section: Grain Yieldmentioning

confidence: 99%

Changes in the spatial distribution of maize plants affect solar radiation use efficiency

Sgarbossa¹,

Silva²,

Elli³

et al. 2018

Aust J Crop Sci

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Spatial arrangement of plants is undoubtedly considered to be the key in determining high production levels of the maize crop. This study was conducted to evaluate the benefits of variations in the spatial distribution of maize plants. The spatial distribution has its effect on the leaf area index (LAI) and efficiency in the use of solar radiation. All these factors affect the yield of maize. The experiment was conducted in Frederico Westphalen-RS, in 2015/2016 agricultural year. The experimental design comprised of a randomized but homogenized block in a factorial 4 × 3 × 7, namely, four variations of plants in one sowing line (0, 20, 40 and 60%); three plants with different spacings (pre-determined), and seven plant collections during the crop cycle with four replications. The increase in the variation in the distribution of plants resulted in greater LAI values and more efficient use of solar radiation. However, it did not show any effect on the crop productivity levels. Varation of spatial distribution increased the efficient utilization of solar radiation in different ways between plants in the sowing line. This happened due to increase in LAI values and the capture of solar radiation. Under favorable weather conditions, some possible failures in plant distribution in the sowing line do not interfere with the crop yield. This research recommends the acceptable levels of variation that do not compromise crop yield.

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Parâmetros Fisiológicos e Produtividade de Espigas Verdes de Milho sob Diferentes Lâminas de Irrigação

Cited by 11 publications

References 3 publications

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Produtividade Do Milho Verde Irrigado Por Gotejamento Na Amazônia Ocidental

Changes in the spatial distribution of maize plants affect solar radiation use efficiency

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