363-9 Yield and Quality Response to N Fertilizer by Six Durum Wheat Varieties.

See more from this Division: C03 Crop Ecology, Management & Quality
See more from this Session: Crop Ecology, Management and Quality
Wednesday, October 24, 2012: 10:15 AM
Duke Energy Convention Center, Junior Ballroom A, Level 3
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Guangyao Wang1, Kelly Thorp2, Kevin Bronson2 and Zhejun Liang1, (1)Maricopa Ag Center, University of Arizona, Maricopa, AZ
(2)USDA-ARS, Maricopa, AZ
Grain protein in durum wheat is economically important and recommendations on late N application rates for protein premium are of interest to growers and industry. Yield prediction at anthesis is essential for appropriate N rate to reach 13% protein premium. A field trial with six durum wheat varieties were conducted in 2011 and 2012 growing seasons to study crop yield and quality response to six N rates. Five biomass samples were taken in each growing season to measure leaf area, biomass, and N accumulation in biomass. Remote sensing and SPAD meter reading were also taken and crop model DSSAT used for yield prediction and late N management at anthesis. Crop varieites differed in N uptake efficiency and N use efficiency. Spetral and SPAD readings at anthesis and crop model accurately predicted grain yield and can be used for late N management.
See more from this Division: C03 Crop Ecology, Management & Quality
See more from this Session: Crop Ecology, Management and Quality