Improved Late Season Nitrogen Fertilizer Management with Irrigated Durum Wheat Using Stem Nitrate Analyses

Persistent Link:
http://hdl.handle.net/10150/201382
Title:
Improved Late Season Nitrogen Fertilizer Management with Irrigated Durum Wheat Using Stem Nitrate Analyses
Author:
Doerge, T. A.; Ottman, M. J.
Issue Date:
Sep-1991
Publisher:
College of Agriculture, University of Arizona (Tucson, AZ)
Journal:
Forage and Grain: A College of Agriculture Report
Abstract:
A field experiment was conducted on a Trix clay loam at the Maricopa Agricultural Center to 1) determine the optimum rates of late season N needed to achieve optimum yield and quality of irrigated durum wheat in conjunction with varying rates of early season N, and 2) to evaluate the usefulness of stem NO₃⁻N analysis in predicting the late season N rates which optimize grain production but minimize the potential for nitrate pollution of groundwater. The application of 75, 150 and 300 lbs. N/a during vegetative growth resulted in wheat with highly deficient, slightly deficient and excessive N status at the boot stage as indicated by stem NO₃⁻N analysis. The application of 60 lbs. N/a at heading to highly N-deficient and slightly N-deficient wheat resulted in grain protein levels of 12.7 and 14.3 % respectively but had little effect on grain yield. Applications from 0 to 60 lbs. N /acre at heading to wheat which had previously received excessive N did not affect grain yield but did increase grain protein levels from 15.2 to 17.4 %. The use of stem NO₃⁻N analysis appears to be a useful tool in predicting the minimum N rate to be applied during the early reproductive period to insure acceptable levels of grain protein at harvest in cases where N status during the vegetative period was not highly deficient.
Keywords:
Agriculture -- Arizona; Grain -- Arizona; Forage plants -- Arizona; Barley -- Arizona; Durum -- Arizona; Wheat -- Arizona; Barley -- Fertilization and irrigation; Durum -- Fertilization and irrigation; Wheat -- Fertilization and irrigation
Series/Report no.:
370090; Series P-90

Full metadata record

DC FieldValue Language
dc.titleImproved Late Season Nitrogen Fertilizer Management with Irrigated Durum Wheat Using Stem Nitrate Analysesen_US
dc.contributor.authorDoerge, T. A.en_US
dc.contributor.authorOttman, M. J.en_US
dc.date.issued1991-09-
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.identifier.journalForage and Grain: A College of Agriculture Reporten_US
dc.description.abstractA field experiment was conducted on a Trix clay loam at the Maricopa Agricultural Center to 1) determine the optimum rates of late season N needed to achieve optimum yield and quality of irrigated durum wheat in conjunction with varying rates of early season N, and 2) to evaluate the usefulness of stem NO₃⁻N analysis in predicting the late season N rates which optimize grain production but minimize the potential for nitrate pollution of groundwater. The application of 75, 150 and 300 lbs. N/a during vegetative growth resulted in wheat with highly deficient, slightly deficient and excessive N status at the boot stage as indicated by stem NO₃⁻N analysis. The application of 60 lbs. N/a at heading to highly N-deficient and slightly N-deficient wheat resulted in grain protein levels of 12.7 and 14.3 % respectively but had little effect on grain yield. Applications from 0 to 60 lbs. N /acre at heading to wheat which had previously received excessive N did not affect grain yield but did increase grain protein levels from 15.2 to 17.4 %. The use of stem NO₃⁻N analysis appears to be a useful tool in predicting the minimum N rate to be applied during the early reproductive period to insure acceptable levels of grain protein at harvest in cases where N status during the vegetative period was not highly deficient.en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectGrain -- Arizonaen_US
dc.subjectForage plants -- Arizonaen_US
dc.subjectBarley -- Arizonaen_US
dc.subjectDurum -- Arizonaen_US
dc.subjectWheat -- Arizonaen_US
dc.subjectBarley -- Fertilization and irrigationen_US
dc.subjectDurum -- Fertilization and irrigationen_US
dc.subjectWheat -- Fertilization and irrigationen_US
dc.identifier.urihttp://hdl.handle.net/10150/201382-
dc.relation.ispartofseries370090en_US
dc.relation.ispartofseriesSeries P-90en_US
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