GRAIN YIELD OF SOYBEAN CULTIVARS IN FLOODED SOIL

  • ANDRÉ LUIS THOMASI
  • JOÃO LEONARDO FERNANDES PIRES
  • VALMIR GAEDKE MENEZES
Keywords: Glycine max, flood irrigation, flooding tolerante.

Abstract

Two experimenta were performed at the Rice Experimental Farm of IRGA, in the county of Cachoeirinha-Rio Grande do Sul, Brazil, in the 1997/98 and 1998/99 growing seasons, with objective to evaluate soybean grain yield grown in flooded soil. In the 1997/98 growing season, 20 cultivars were evaluated, under 774 mm of precipitation and two flooding irrigation at the reproductive stage. The medium grain yield was of 2598 kg/ ha, the cultivar FT-Abyara (3727 kg/ha) produced the highest yield, and did not differ of other 17 cultivars. The cultivar BR-4 had the lowest grain yield (1555 kg/ha). In 1998/99 growing season, were evaluated 30 cultivars, under 346 mm of precipitation and two flooding periods: one of eight days when plants had six developed leaves and another of two days in the seed-formation begin. The medium grain yield was of 1010 kg/ha, with the highest yield in the cultivar FT-2004 (2065 kg/ha), although it did not differ of other 14 cultivars. These results demonstrated the existente of genetic variability in soybean cultivars under excess of soil water.

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Published
2000-08-31
How to Cite
THOMASI, A. L.; PIRES, J. L. F.; MENEZES, V. G. GRAIN YIELD OF SOYBEAN CULTIVARS IN FLOODED SOIL . Pesquisa Agropecuária Gaúcha, v. 6, n. 1, p. 107-112, 31 Aug. 2000.