Journal of Food, Agriculture and Environment

Effect of water stress on yield components of sorghum (Sorghum bicolor)

Author(s):

Cândido Ferreira de Oliveira Neto, Ricardo Shigueru Okumura, Ismael de Jesus Matos Viégas, Heráclito Eugênio Oliveira da Conceição, Lucila Elizabeth Fragoso Monfort, Raimundo Thiago Lima da Silva, Jackeline Araújo Mota Siqueira, Luma Castro de Souza, Roberto Cezar Lobo da Costa, Daiane de Cinque Mariano

Recieved Date: 2014-06-18, Accepted Date: 2014-09-22

Abstract:

The aim of the study was to evaluate the influence of water stress on yield components of hybrid of sorghum BR-700. The experiment was conducted in a greenhouse at the Federal University of Rural of Amazônia, Belém city, State of Pará, Brazil. The experiment was carried out in the completely randomized design in a 2 x 3 factorial scheme, consisting of two water conditions (control and stress), and initiation of water stress at three growth stages of sorghum (vegetative, reproductive and physiological maturity), with 5 repetitions. The evaluations were performed after each period of stress in the plant, measuring variables: dry mass of stem, dry mass of leaves, dry mass of panicle, dry mass of shoots, total dry mass, number of grains plant^-1, mass of 100 grains and dry mass of grains plant^-1. Water stress promoted a reduction in the number of leaves and stem diameter, regardless of the phenological stage of culture, except plant height, which was statistically equal to the control. Concerning the variable dry mass of stem, dry mass of leaves, dry mass of panicle, dry mass of shoots and the total dry mass were reduced dramatically with fifteen days of water stress. Water stress promoted low production of plant, evidenced by the low number of grains plant^-1, 100 grain mass and grain yield plant^-1, showing that the hybrid sorghum BR-700 was sensitive to water stress, independent of phenological stage of water stress occurrence.

Keywords:

Grain yield, drought tolerance, plant biometrics

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 3&4
Category: Agriculture
Pages: 223-228

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