Establishment of corn plants under different water regiments

Autores

  • Millena Ramos dos Santos Universidade Estadual de Goiás, Campus Sudeste, Unidade Ipameri
  • Gabriel Henrique Ferreira de Lima Universidade Estadual de Goiás, Campus Sudeste, Unidade Ipameri
  • Victor Luiz Gonçalves Pereira Universidade Estadual de Goiás, Campus Sudeste, Unidade Ipameri
  • Victor Alves Amorim Universidade Estadual de Goiás, Campus Sudeste, Unidade Ipameri
  • Larissa Pacheco Borges Universidade Estadual de Goiás, Campus Sudeste, Unidade Ipameri
  • Fábio Santos Matos Universidade Estadual de Goiás, Campus Sudeste, Unidade Ipameri

Resumo

Abstract: The objective of this study was to identify the effect of water availability on corn plant growth. The study was carried out in greenhouse located at the State University of Goiás, Brazil, South-East Campus Ipameri. Four corn seeds 2A401P hybrid were planted in each polyethylene pot containing 8 kg substrate consisting of soil, sand and manure at the proportion of 3:1:1, respectively. A completely randomized design was used with six treatments and six replications. After emergence and initial development, the plants were irrigated with volumes of water corresponding to 0% (0ml), 25% (80 ml), 50% (160 ml), 100% (320 ml), 200% (640 ml) and 400% (1280 ml) of the daily crop evapotranspiration at 23 days after emergence. At 31 days after emergence the following variables were analyzed: number of leaves, plant height, stem diameter, total biomass, root mass ratio, stem mass ratio, leaf mass ratio, photosynthetic pigments, relative water content, transpiration rate and chlorophyll a fluorescence. Water shortage and flooding inhibited corn plant growth of 2A401P hybrid and thus damaged the establishment of the crop, but at different intensities, because water shortage was shown to be much more restrictive to plant growth than flooding. Furthermore, it is pointed out that corn plants are isohydric, because they anticipate water shortage by an efficient stomata sensitivity that controls water loss by transpiration. Considering the results of corn plants growth, is recommended that it be irrigated with a volume of water corresponding to 200% of the daily evapotranspiration.

 

Keywords: Zea mays, Flooding, Drought.

 

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Publicado

2021-07-26

Como Citar

dos Santos, M. R., de Lima, G. H. F., Pereira, V. L. G., Amorim, V. A., Borges, L. P., & Matos, F. S. (2021). Establishment of corn plants under different water regiments. MAGISTRA, 31, 707–715. Recuperado de https://www3.ufrb.edu.br/index.php/magistra/article/view/4382

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Artigo Científico