72-11 Rice Yield and Aboveground Biomass Response to Nitrogen Additions.

See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: S4/S8 M.S. Oral Competition

Monday, November 7, 2016: 1:50 PM
Phoenix Convention Center North, Room 129 B

Richard Turner1, Bobby R. Golden2, Jason Bond3, Jeff Gore2 and Trent Irby4, (1)Mississippi State Extension and Research Center, Belzoni, MS
(2)Mississippi State University, Stoneville, MS
(3)Delta Research and Extension Center, Mississippi State University, Stoneville, MS
(4)Plant and Soil Sciences, Mississippi State University, Starkville, MS
Abstract:
Rice (Oryza sativa L.) is a crop predominantly grown in the Mid-South. Current Mississippi State recommendations for N in rice production is a single application of 168 kg of total N/ha on sandy soils and 201.6 kg of N/ha-1 on its clay soils. Our primary objective is to find an alternative N management strategy that can potentially be used to eliminate the cost associated with an aerial application common in delayed-flood rice production common in the Mid-South. Research will be established at the Delta Research and Extension Center, at Stoneville, MS on both sandy loam and clay soils, all experimental design was a split-plot. N sources being evaluated are Environmentally Smart Nitrogen (ESN), Ammonium sulfate (AMS), Diammonium Phosphate (DAP), Agrotain treated urea, and urea. Timings were established at planting, 2-leaf growth stage, 7 days before flood, and midseason with a yearly total rate of 168 kg ha-1, plus an untreated check. After year one of data Agro-7DBF produced the greatest number of tillers and aboveground biomass at both sample timings (HDN and PD). ESN-2LF produced numerically the greatest but significantly the same as Agro-7DBF, ESN-DAP-, ESN+MS and ESN-7DBF; the importance of this data proves that N fertilizer can be applied early from a ground rig before the levee system has been established and eliminate the use of aerial applications

See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: S4/S8 M.S. Oral Competition