Fertilizer Nitrogen Recovery and N15 and Bromide Distribution in the Soil Profile as Affected by the Time of Application on an Irrigated Upland Cotton (Gossypium hirsutum L.)

Persistent Link:
http://hdl.handle.net/10150/194172
Title:
Fertilizer Nitrogen Recovery and N15 and Bromide Distribution in the Soil Profile as Affected by the Time of Application on an Irrigated Upland Cotton (Gossypium hirsutum L.)
Author:
Navarro-Ainza, Jose A. Cristobal
Issue Date:
2007
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The first project involved the evaluation of different times of application on the fertilizer nitrogen recovery (FNR) in the soil-plant system in an irrigated upland cotton system, during two seasons. This was accomplished by using the isotopic dilution technique applying the 15N to microplots. No differences were observed in the total plant FNR, seed and stover, soil and the total FNR among the different 15N application times; however, despite no differences were observed in the plant the FNR value ranged from 30-38%, while the seed exhibited the highest FNR with an average over 50% of the 15N recovered in the plant. In the soil, the obtained average FNR value was over 40% while the total FNR (plant + soil) ranged from 70-80%, being reduced as the 15N application time was delayed.The second project was conducted during two seasons to examine the 15N and bromide distribution pattern in the soil profile as a function of the time of application. 15Nitrogen and bromide were applied to the soil at three different times in a cotton growth cycle; after that, soil samples were taken at the end of the cotton cycle to a depth of 1.80 m., and 15N and bromide recoveries were determined. Slightly higher FNR were obtained with the intermediate application time. The higher FNR were detected in the surface layer (0-30 cm) with an average of 40%. Below 30 cm depth, low 15N recoveries were obtained and even lower below the 60 cm soil layer. Bromide recovery behavior was related to the water movement in the soil profile: as the Br- application time was delayed more of the anionic tracer was found in the top of the soil profile, while less Br- was found in the surface soil for the early Br- application time.
Type:
text; Electronic Dissertation
Keywords:
Fertilizer Nitrogen Recovery; N15; Bromide; Time of Application; Cotton
Degree Name:
PhD
Degree Level:
doctoral
Degree Program:
Soil, Water & Environmental Science; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Silvertooth, Jeffrey C.

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleFertilizer Nitrogen Recovery and N15 and Bromide Distribution in the Soil Profile as Affected by the Time of Application on an Irrigated Upland Cotton (Gossypium hirsutum L.)en_US
dc.creatorNavarro-Ainza, Jose A. Cristobalen_US
dc.contributor.authorNavarro-Ainza, Jose A. Cristobalen_US
dc.date.issued2007en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe first project involved the evaluation of different times of application on the fertilizer nitrogen recovery (FNR) in the soil-plant system in an irrigated upland cotton system, during two seasons. This was accomplished by using the isotopic dilution technique applying the 15N to microplots. No differences were observed in the total plant FNR, seed and stover, soil and the total FNR among the different 15N application times; however, despite no differences were observed in the plant the FNR value ranged from 30-38%, while the seed exhibited the highest FNR with an average over 50% of the 15N recovered in the plant. In the soil, the obtained average FNR value was over 40% while the total FNR (plant + soil) ranged from 70-80%, being reduced as the 15N application time was delayed.The second project was conducted during two seasons to examine the 15N and bromide distribution pattern in the soil profile as a function of the time of application. 15Nitrogen and bromide were applied to the soil at three different times in a cotton growth cycle; after that, soil samples were taken at the end of the cotton cycle to a depth of 1.80 m., and 15N and bromide recoveries were determined. Slightly higher FNR were obtained with the intermediate application time. The higher FNR were detected in the surface layer (0-30 cm) with an average of 40%. Below 30 cm depth, low 15N recoveries were obtained and even lower below the 60 cm soil layer. Bromide recovery behavior was related to the water movement in the soil profile: as the Br- application time was delayed more of the anionic tracer was found in the top of the soil profile, while less Br- was found in the surface soil for the early Br- application time.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
dc.subjectFertilizer Nitrogen Recoveryen_US
dc.subjectN15en_US
dc.subjectBromideen_US
dc.subjectTime of Applicationen_US
dc.subjectCottonen_US
thesis.degree.namePhDen_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineSoil, Water & Environmental Scienceen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairSilvertooth, Jeffrey C.en_US
dc.contributor.committeememberSilvertooth, Jeffrey C.en_US
dc.contributor.committeememberThompson, Thomas L.en_US
dc.contributor.committeememberOttman, Mikeen_US
dc.contributor.committeememberBrown, Paulen_US
dc.identifier.proquest2365en_US
dc.identifier.oclc659748264en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.