GRAIN YIELD OF SOYBEAN CULTIVARS IN FLOODED SOIL

• Autor(a) principal: THOMASI, ANDRÉ LUIS
• Data de Publicação: 2000
• Outros Autores: PIRES, JOÃO LEONARDO FERNANDES, MENEZES, VALMIR GAEDKE
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
• Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/452
• topic: Glycine max, flood irrigation, flooding tolerante.; Glycine max, irrigação por inundação, tolerância à inundação.

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.