102331 Soybean Nodule Inhibition and Root Growth As Influenced By Nitrogen Source and Nitrogen Rate.
Poster Number 468-416
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: Fertilizer & Lime Responses 1
Wednesday, November 9, 2016
Phoenix Convention Center North, Exhibit Hall CDE
Abstract:
Greenhouse studies were conducted in Stoneville, MS in 2016 to evaluate the influence of supplemental N fertilizer on nodule formation and root growth of soybean (Glycine max (L.) Merr.). Greater below ground biomass was observed on silt-loam soils versus below ground biomass on clay soils directly correlating to all other root parameters. N fertilizers additions resulted in approximately 19% below ground biomass reduction across soil textures when compared to soybean receiving no N (0 kg N ha -1). However, soybean above ground biomass was observed to have no response to N fertilizer additions. Soybean receiving N fertilization were observed to exhibit a decrease across all belowground experimental parameters when compared to soybean receiving no N (0 kg N ha -1). N fertilizers additions were observed to result in a 52% decrease in mean number of nodules present. N fertilizers utilizing ESN as the N source observed to exhibit a greater number of nodules than that of urea+NBPT as the N source. Overall, N fertilizer additions negatively impacted root growth and nodulation resulting in a decrease across all experimental below ground parameters.
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: Fertilizer & Lime Responses 1