Optimum Leaf Area Index to Reach Soybean Yield Potential in Subtropical Environment

• DOI: 10.2134/agronj2017.09.0523
• Publication Date: 2018-03-29T19:48:30Z
• Authors: Eduardo Lago Tagl...; Nereu Augusto Streck; Thiago Schmitz Ma...; Gean Leonardo Ric...; Michel Rocha da S...; Jossana Ceolin Cera; Jerson Vanderlei ...; Alencar Junior Zanon
• Keywords: Habit; Humid subtropical climate; Indeterminate growth

Core Ideas The optimum leaf area index (LAI) at beginning bloom to reach the yield potential is between 3.6 (indeterminate stem termination) and 4.5 (determinate termination). LAI maximum 6.0 6.5 for indeterminate determined cultivars. high should be adjusted according maturity group, termination sowing date. increase in was observed with of experiments farms a technological level (soybean more than Mg ha −1 ). interactive influence climate management factors on soybean has not been investigated subtropical environments. Such information can help optimizing current practices seed efficiency resource use. objective this study identify attaining modern cultivars grown environment. A large yield, LAI, phenology database collected from combination on‐farm research‐station conducted during four growing seasons (2011–2015) southern Brazil used. represented wide range weather conditions, soil types, dates, cultivar groups (MGs). boundary function derived relationship R1 R5 developmental stages determinate growth habit, both types combined. An line small gap In case, stage (LAI R1, opt ) 3.4 (indeterminate) (determinate) whereas optimal max,opt cultivars, respectively. These results suggested that crops involve must habit date