The Effect of Humic Acid on Yield and Fe Uptake of Soybean

摘要

The objective of this research was to examine the effect of humic acid (HA) on yield and iron uptake of soybean (Glycine max L.). The experiment was conducted in randomized plot design with the treatments of 0, 0.5, 1.0 and 2.0 kg Fe/da (FeSO4.7H2O) dose applications. Humic acid was added as a dose of 10 kg HA/da in each treatment. In the study, it was found that iron application with HA increased yield, leaf and Fe content in grain significantly (P<0.01). The highest yield amount and 100 grain weight of soybean were 378.07 kg/da and 20.64 g in 1.0 kg Fe/da+HA application, respectively. The highest Fe content in leaf and grain were 365.40 ppm and 165.17 ppm in 0.5 kg Fe/da+HA application, respectively. Consequently, the application of 0.5 and 1.0 kg Fe/da with 10 kg HA to soyabean was recommended.