| View Larger Image | Methane emission in four rice varieties as related to sugars and organic acids of roots and root exudates and biomass yield [An article from: Agriculture, Ecosystems and Environment] | Digitalby O. Kerdchoechuen (Author)
| List Price: | $10.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Elsevier | | Publication Date: | June 15, 2005 |
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Product Description
This digital document is a journal article from Agriculture, Ecosystems and Environment, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: Rice (Oryza sativa L.) fields contribute to global methane (CH"4) emission and warming. This study determined cultivar variations in CH"4 emission in relation to sugar and organic acid composition of the roots and root exudates and shoot and root biomass at the vegetative, reproductive and ripening stages of the rice plant. Thai cultivars Supanburi 1 (SP1), Supanburi 60 (SP60), Supanburi 90 (SP90) and Chainat 1 (CN1) were used. CH"4 flux rates were comparably higher in CN1 and SP1 than in SP60 and SP90. Glucose and acetic acid were the predominant sugar and organic acid, respectively. Sugar and organic acid contents of root exudate had no direct relationship with CH"4 fluxes regardless of growth stage. Total sugars of root tissues did not similarly compare with CH"4 flux rates. However, at the ripening stage, root glucose content was higher in CN1 while root fructose and acetic acid contents were higher in SP1. Shoot and root weights at the different growth stages were also consistently higher in SP1 and CN1 (high-CH"4 emitters) than in SP60 and SP90 (low-CH"4 emitters). The results demonstrate cultivar-dependent rates of CH"4 production due to some compositional differences and provide fundamental basis for cultivar selection as a mitigation strategy to reduce CH"4 emission from ricefields. |
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