Different water availability in the economic water productivity in soybean cultivars

AUTOR(ES)

Rodrigues, Silvana Antunes; Peiter, Marcia Xavier; Robaina, Adroaldo Dias; Bruning, Jhosefe; Ferreira, Laura Dias; Chaiben Neto, Miguel

FONTE

Revista Ceres

DATA DE PUBLICAÇÃO

2023

RESUMO

ABSTRACT The present work aims to evaluate grain productivity, water productivity, and economic water productivity of three soybean cultivars under supplementary irrigation. Two experiments were conducted during the 2018 and 2019 harvests in Santa Maria/RS, Brazil. The experimental design consisted of a random bifactorial block design with six irrigation depths as the first factor and three soybean cultivars (Glycine max L.) as the second. The irrigation system used was the conventional fixed sprinkler, with a fixed irrigation shift of seven days. Crop productivity, water productivity, and economic water productivity were evaluated. The highest productivity was for 100% of reference evapotranspiration (ETo) in both harvests. Maximum technical efficiency was obtained for depths of 73.03% (Harvest 1) and 77.94% (Harvest 2) of ETo. Both harvests presented higher water productivity and economic water productivity in the 50% and 25% ETo depths respectively. Productivity is increased with irrigation, and the economic water productivity is maximized with reduction of depth.

Documentos Relacionados

• MODELING YIELD, SOIL WATER BALANCE, AND ECONOMIC RETURN OF SOYBEAN UNDER DIFFERENT WATER DEFICIT LEVELS
• Water stress induced by mannitol and sodium chloride in soybean cultivars
• Water availability to soybean crop as a function of the least limiting water range and evapotranspiration1
• CROP WATER STRESS INDEX OF COWPEA UNDER DIFFERENT WATER AVAILABILITY LEVELS IN CASTANHAL-PA
• Source-sink relationships in two soybean cultivars with indeterminate growth under water deficit