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12
Apr
2013
Recommended Nitrogen Rates and Distribution for Rice in Arkansas 2013
Author: Trenton Roberts, Research Assistant Professor, Crop, Soil & Environmental Sciences

Rice planting is in full swing and with pre-flood nitrogen (N) applications fast approaching careful consideration should be given to identification of the proper N rate and time of application for your rice crop. The 2013 recommended N rates and distribution for rice cultivars is now available on the University of Arkansas Division of Agriculture Cooperative Extension Service website and available on the Arkansas Row Crops blog under the publications tab. Five new cultivars were added this year, including: Antonio, Colorado, Della-2, RiceTec XP4523, and RiceTec CLXP4534. The recommended N rates listed here are the base N rate recommendation for rice produced on silt loam soils following soybean in rotation. Please refer to the 2013 recommended N rates table for determining N rates for clay soils and other Early N Rate adjustments. Antonio and Colorado were developed at Texas A&M University and are typical in maturity to other semi-dwarf long-grain rice varieties. The recommended N rate for Antonio produced on silt loam soils is 150 total lbs N/A applied in a standard two-way split with 105 lbs N/A applied pre-flood and 45 lbs N/A applied at beginning internode elongation (BIE). The N rate for Colorado produced on silt loam soils is 135 total lbs N/A applied in a standard two-way split with 90 lbs N/A applied pre-flood and 45 lbs N/A applied at BIE. Della-2 (LA) is a conventional long-grain aromatic rice variety that is similar to Jazzman and Jazzman-2. The recommended N rate for Della-2 produced on silt loam soils is 135 total lbs N/A applied in a standard two-way split with 90 lbs N/A applied pre-flood and 45 lbs N/A applied at BIE. RiceTec XP4523 and CLXP4534 are both short-statured hybrids that are 6 days earlier than CLXL 745. The recommended N rate for both XP4523 and CLXP4534 produced on silt loam soils is 120 total lbs N/A applied in a two-way split with 90 lbs N/A applied pre-flood and 30 lbs N/A applied at late-boot. Management of pre-flood N applications is an important component in determining rice yield and disease potential. Please refer to the Rice Production Handbook MP 192 for more information regarding proper N management for Arkansas Rice Production.

 

Urea in HandsNitrogen Fertilizer Recommendations for Rice 2013


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