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 158
- Downloads 0
Physiochemical Characterization of Fluoride (F) Contaminated Soil and its Microbe-Assisted Bioremediation by Prosopis juliflora
Fluoride (F) contamination is a worldwide problem which has severe consequences on human and animal health. Physiochemical characteristics of F-polluted soil in different sites (Banasthali, Rajasthan, India) were tested....
Effect of Phosphorus Rates in Blended Fertilizer (NPS) and Row Spacing on Production of Bushy Type Common Bean (Phaseolus Vulgaris L.) at Mid-land of Guji, Southern Ethiopia
In Ethiopia, common bean (Phaseolus Vulgaris L.) is usually grown by smallholder farmers and its average yield is low. The low yield of common bean in Ethiopia is attributed to several production constraints, which inclu...
Screening and Quantification of Artemisinin and Phytochemicals Content in Artemisia nilagarica (C.B. Clarke) Pamp.
The present study reports, for the first time, the quantification of secondary metabolites including artemisinin in field grown plant samples and in vitro regenerated plantlets and callus tissues of Artemisia nilagarica...
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...
Yield Response of Common Bean (Phaseolus vulgaris L.) Varieties to Combined Application of Nitrogen and Phosphorus Fertilizers at Mechara, Eastern Ethiopia
A field experiment was conducted in 2012 cropping season to determine the optimum rates of nitrogen and phosphorus fertilizers for maximum yield of common bean and to select the best combination of varieties and fertiliz...