Water and nutrient management for wheat and barley grown under saline conditions.

Persistent Link:
http://hdl.handle.net/10150/187026
Title:
Water and nutrient management for wheat and barley grown under saline conditions.
Author:
Khan, Mohammad Jamal.
Issue Date:
1994
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:
Two separate investigations, on wheat and barley were conducted under control environments. In the first experiment, two wheat varieties, selection line (SL) and Yecoro Rojo (YR) were grown in 100 mM NaCl salinized sand culture with the additional 2 levels (4 and 8 meq/L) of Ca, Mg and NH₄ application. Control treatments (0 salt plus 4 meq/L of Ca, Mg and NH₄) were also included. The fresh and dry matter yield after 4 weeks in salinized Hoagland solution and supplemental nutrient addition reveals that salinity significantly reduced the yield and the addition of 8 meq/L NH₄ increase the yield among the salt treatment pots followed by 8 meq/L supplemental Ca. Likewise, number of tillers and grain yield was also increased by the addition of 8 meq/L NH₄ to salinized Hoagland solution. SL produced significantly higher yields than YR. Water and osmotic potential were significantly increased with salinity but turgor potential was not effected significantly. Concentrations of Na and Cl were significantly higher in both varieties in the salt added plants, and the uptake was reduced by the high level of supplemental NH₄. Generally, YR (a salt sensitive variety) absorbed higher amount of Na, Mg, Cl and PO₄, which might be the possible cause of nutritional disturbance and hence reduced yield. In the second experiment, two selected barley varieties (California Mariout and Gustoe) were grown in lysimeter, irrigated with two NaCl salinity water (150 and 250 mM) and a control with two LF (0.2 and 0.4). As the salt concentrations of irrigation water increased, vegetative growth and grain yield reduced significantly. LF 0.4 had significant effect at moderate salinity on yield but was similar as LF, 0.2 when the salinity increased to 250 mM. Both varieties achieved the highest WUE for the above ground dry matter and grain yield at moderate salinity. Mariout was salt tolerant and high yielding both in and out of salinity. Soil salinity (ECₑ) and Na content increased as the salinity of irrigation water increased. Na concentration of leaf tissue was significantly increased, while Ca and K concentration decreased with increase in salinity. The possible reason for reduced yield at high salinity was the Ca deficiency.
Type:
text; Dissertation-Reproduction (electronic)
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Soil and Water Science; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Bohn, Hinrich L.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleWater and nutrient management for wheat and barley grown under saline conditions.en_US
dc.creatorKhan, Mohammad Jamal.en_US
dc.contributor.authorKhan, Mohammad Jamal.en_US
dc.date.issued1994en_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.abstractTwo separate investigations, on wheat and barley were conducted under control environments. In the first experiment, two wheat varieties, selection line (SL) and Yecoro Rojo (YR) were grown in 100 mM NaCl salinized sand culture with the additional 2 levels (4 and 8 meq/L) of Ca, Mg and NH₄ application. Control treatments (0 salt plus 4 meq/L of Ca, Mg and NH₄) were also included. The fresh and dry matter yield after 4 weeks in salinized Hoagland solution and supplemental nutrient addition reveals that salinity significantly reduced the yield and the addition of 8 meq/L NH₄ increase the yield among the salt treatment pots followed by 8 meq/L supplemental Ca. Likewise, number of tillers and grain yield was also increased by the addition of 8 meq/L NH₄ to salinized Hoagland solution. SL produced significantly higher yields than YR. Water and osmotic potential were significantly increased with salinity but turgor potential was not effected significantly. Concentrations of Na and Cl were significantly higher in both varieties in the salt added plants, and the uptake was reduced by the high level of supplemental NH₄. Generally, YR (a salt sensitive variety) absorbed higher amount of Na, Mg, Cl and PO₄, which might be the possible cause of nutritional disturbance and hence reduced yield. In the second experiment, two selected barley varieties (California Mariout and Gustoe) were grown in lysimeter, irrigated with two NaCl salinity water (150 and 250 mM) and a control with two LF (0.2 and 0.4). As the salt concentrations of irrigation water increased, vegetative growth and grain yield reduced significantly. LF 0.4 had significant effect at moderate salinity on yield but was similar as LF, 0.2 when the salinity increased to 250 mM. Both varieties achieved the highest WUE for the above ground dry matter and grain yield at moderate salinity. Mariout was salt tolerant and high yielding both in and out of salinity. Soil salinity (ECₑ) and Na content increased as the salinity of irrigation water increased. Na concentration of leaf tissue was significantly increased, while Ca and K concentration decreased with increase in salinity. The possible reason for reduced yield at high salinity was the Ca deficiency.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineSoil and Water Scienceen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairBohn, Hinrich L.en_US
dc.contributor.committeememberGlenn, Edward P.en_US
dc.contributor.committeememberHendricks, David M.en_US
dc.contributor.committeememberFfolliott, Peter F.en_US
dc.identifier.proquest9527988en_US
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