Survey of the Silicon Status of Flooded Rice in Louisiana

Low Si content in rice (Oryza sativa L.), sugarcane (Saccharum officinarum L.), and other Si-accumulating crops can adversely affect crop performance by increasing susceptibility to abiotic and biotic stresses. Although it is generally assumed in the United States that soils containing appreciable a...

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Published inAgronomy journal Vol. 102; no. 2; pp. 523 - 529
Main Authors Kraska, Joseph E, Breitenbeck, Gary A
Format Journal Article
LanguageEnglish
Published Madison American Society of Agronomy 01.03.2010
Subjects
acid soils
Agronomy. Soil science and plant productions
Biological and medical sciences
developmental stages
flood irrigation
flooded conditions
Freshwater
Fundamental and applied biological sciences. Psychology
leaves
nutrient availability
nutrient uptake
nutritional status
Oryza sativa
plant nutrition
rice
Saccharum officinarum
silicon
soil fertility
Louisiana
United States
North America
America
USA, Louisiana
Non metal
Status
Subtropical zone
Monocotyledones
Flooded rice
Group IVA element
Physical environment
Rainfed lowland rice cultivation
Oryza
Gramineae
Agronomy
Angiospermae
Herbaceous plant
Spermatophyta
Silicon
Lowland
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Summary:Low Si content in rice (Oryza sativa L.), sugarcane (Saccharum officinarum L.), and other Si-accumulating crops can adversely affect crop performance by increasing susceptibility to abiotic and biotic stresses. Although it is generally assumed in the United States that soils containing appreciable amounts of silicate clays supply adequate Si to meet crop demands, there is little evidence to support this assumption. A survey was conducted to assess the Si status of rice plants at mid-tiller (Y-leaf) and at harvest (straw) in 97 rice fields located throughout the rice-growing regions of Louisiana. On average, Y-leaves contained 30.5 ± 7.8 g Si kg–1, whereas mature rice straw contained 54.7 ± 12.7 g Si kg–1. Low early season Si assimilation occurred in nearly all rice fields, whereas only 36% contained mature straw with <50 g Si kg–1, a level commonly used to indicate sufficiency. Late-season deficiencies were limited to fields in extreme southwest Louisiana where soils tend to be strongly acidic and have a long history of rice production.
Bibliography:http://dx.doi.org/10.2134/agronj2009.0146
All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher.
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ISSN:0002-1962
1435-0645
DOI:10.2134/agronj2009.0146