Zinc Availability and Dynamics in the Transition from Flooded to Aerobic Rice Cultivation
Journal Title: Journal of Plant Biology & Soil Health - Year 2015, Vol 2, Issue 1
Abstract
Zinc (Zn) deficiency is a fairly wide spread agronomic constraint in many of the world rice production regions. Zn deficiency inhibits several plant biological and physiological processes including carbohydrate metabolism, maintenance of cell turgidity and protein synthesis. Water scarcity is currently necessitating a shift towards non-flooded rice cultivations, which can have substantial impact on soil Zn availability. Zn availability is a function of both plant and soil factors; these could largely be influenced by the shift in water management. For example, in aerobic rice systems, iron oxidation by root-released oxygen causes reduction in rhizosphere pH. The reduced pH limits the release of Zn from highly insoluble fractions. Redox potential often increases in the aerobic cultivation, leading to iron oxidation and concomitant acidification and precipitation of Fe (OH)3 onto which Zn may adsorb. The consequences of the transition in water management necessitate applying fertilizers to correct Zn deficiency and increase grain yield. This paper reviews Zn dynamics and availability in different rice growing systems. The review focuses on soil-plant processes which are influenced by the shift in water management. Fertilization strategies to correct Zn disorder and increase grain Zn content are also discussed.
Authors and Affiliations
Araz S. Abdullah
Keywords
Related Articles
- EP ID EP205525
- DOI 10.13188/2331-8996.1000007
- Views 148
- Downloads 0
Agronomic Performances of Hybrid Sorghum bicolor [L] Moench, Guinea Races Cultivatedunder Limited and High-Soil Phosphorus Conditions
Sorghum bicolor [L] Moench is among the main starchy staples in Mali. However, its yield is low. Development of Guinea sorghum hybrids adapted to the Malian environment is one of the solutions to increase sorghum product...
Indigenous Utilization and Management of Useful Plants in and around Awash National Park, Ethiopia
An ethnobotanical study in and around Awash National Park with special emphasis on useful plants was conducted from September 2014 to August 2015. The study was aimed at documenting the indigenous knowledge of people on...
Response of Common bean (Phaseolus vulgaris L.) Varieties to Rates of Blended NPS Fertilizer in Adola District, Southern Ethiopia
The objective of the present study was to evaluate the effect of Biofield Energy Healing Treatment on the plant callus of Mandukparni (Centella asiatica), Katsarika (Barleria cristata), and Amla (Phyllanthus emblica) in...
Genetic Analysis of Various Traits of Hybrids Sorghum (Sorghum bicolor (L) Moench),Correlated with Drought Tolerance
Sorghum bicolor (L) Moench is one of the most important dry land crops of semi-arid tropics. It is classified predominantly as a self-pollinated crop; however heterosis has been commercially exploited to improve its prod...
The Scaffolding Protein RACK1: A Platform for Diverse Functions in the Plant Kingdom
The receptor for activated C kinase 1 (RACK1) is one of the well-known WD-repeat containing proteins and can interact as a scaffolding protein with many different signaling proteins from distinct signal transduction path...