60-13 Soybean Yield Response and Distribution As Influenced By Supplemental Nitrogen Application.
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: S4/S8 Ph.D. Oral Competition
Monday, November 7, 2016: 2:20 PM
Phoenix Convention Center North, Room 129 A
Abstract:
Field studies were conducted in 2014 and 2015 in Stoneville, MS, to evaluate soybean aboveground biomass and grain yield response to supplemental N fertilization. Studies were carried out on two commonly cropped Mississippi soils, a silt-loam or coarser textured soil and a clay textured soil. Soybean aboveground biomass was observed to be significantly influenced by the main effects of application timing, N rate, and N source on silt-loam soils, while clay soils exhibited no response to any experimental factor influencing aboveground biomass. On silt-loam or coarser textured soils, soybean receiving N fertilization was observed to exhibit mean soybean grain yields 193 kg ha-1 greater than soybean receiving no N (0 kg N ha-1). On clay textured soil, soybean receiving N fertilization was observed to exhibit mean soybean grain yields 281 kg ha-1 greater than soybean receiving no N (0 kg N ha-1). Environmentally Smart Nitrogen was observed to produce the greatest grain yields on silt-loam soils. However, the main effect of N rate appears to be most critical factor influencing soybean grain yield across soil textures. Yield component analysis was observed to exhibit a similar trend to that of overall soybean grain yield as the main effect of N rate significantly influenced yield components, directly paralleling soybean grain yield. N fertilizer additions were able to fulfill soybean N requirement and increase the overall grain yields of the soybean plant in high yielding environments on two common Mississippi soils in the mid-south production system.
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: S4/S8 Ph.D. Oral Competition