Physiological and biochemical aspects of two olive cultivars as influenced by deficit irrigation and irrigation water salinity

Other Title(s)

تأثير العجز المائي و ملوحة مياه الري على الصفات الفسيولوجية و البيوكيميائية لصنفين من الزيتون

Dissertant

al-Tarawinah, Rasha Abd al-Hadi

Thesis advisor

al-Absi, Khalid Musa

Comitee Members

Abd al-Ghani, Adil Hasan Mahmud
Ayyub, Salam Jamal
Mhawish, Usamah Isa

University

Mutah University

Faculty

Faculty of Agriculture

Department

Plant Production Department

University Country

Jordan

Degree

Master

Degree Date

2010

English Abstract

His response of two olive cultivars (Manzinillo and Nabali) to water deficit and irrigation water salinity was studied.

A pot experiment was carried out in glasshouse at the Faculty of Agriculture at Mu'tah University during the period from April 2009 to January 2010.

Four irrigation water salinity treatments (tap Water "control" 40 meq / L, 80meq / L, 120meq / L) with multicomponent solution comprising Ca, Na, Mg, K, SO4, Cl and HCO3) and three depletion levels (30 %, 60 %, 90 % depletion of available water (DAW)) were used.

Some physiological and biochemical traits were measured to evaluate how deficit irrigation and irrigation water salinity affect either by a single factor or by the interaction of the three factors together (water deficit, salinity and cultivar).The results revealed that the two olive cultivars differed in their gas exchange properties responses to water deficit and salinity levels.

Photosynthesis, transpiration rate decreased in response to high salinity and water deficit level.

Water deficit caused reduction in leaf chlorophyll content.

Irrigation water salinity had no significant effect on chlorophyll content.

Leaf proline content increased as water deficit and irrigation water salinity increased.

The interaction among cultivar, water deficit and irrigation salinity levels had significant effect on leaf proline content, and the both cultivars accumulated proline in the same trend.

According to growth parameters, salinity had reduced leaves number, relative growth rate and didn’t affect the stem diameter.

Results of mineral composition showed that leaf and root sodium and chloride content in both cultivars increased as irrigation salinity increased.

Potassium root content increased but potassium leaf content decreased with salinity increasing.

With water deficit levels increasing, root Na, Cl and K content increased but Na+, Cl- leaves content decreased and no significant difference in response of K+ leaf content to water deficit increasing was noticed.

The interaction among cultivar, water deficit and irrigation water salinity increased root and leaf Na content with water deficit increasing at the same salinity level.

For potassium content significant difference in K+ leaf content and insignificant in root content were noticed 'Manzinillo' showed higher K / Na in leaves than ‘Nabali’ Salinity increasing resulted in decreased K / Na ratio of both root and leaves.

Main Subjects

Botany
Agriculture

Topics

• Irrigation
• Salinity
• Soils
• Olives

No. of Pages

123

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-304899