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Effects on rice plant morphology and physiology of water and associated management practices of the system of rice intensification and their implications for crop performance

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Title Effects on rice plant morphology and physiology of water and associated management practices of the system of rice intensification and their implications for crop performance
Not Available
 
Creator A.K. Thakur
Sreelata Rath
D. U. Patil
Ashwani Kumar
 
Subject System of rice intensification (SRI)
Phenotype
Management practices
Water productivity
Physiology
 
Description Not Available
Field experiments were conducted in Bhubaneswar, Orissa, India, during the dry season (January–May) in 2008 and 2009 to investigate whether practices of the System of Rice Intensification (SRI), including alternate
wetting and drying (AWD) during the vegetative stage of plant growth, could improve rice plants’ morphology
and physiology and what would be their impact on resulting crop performance, compared with currently recommended scientific management practices (SMP), including continuous flooding (CF) of paddies. With SRI
practices, grain yield was increased by 48% in these trials at the same time, there was an average water saving of 22% compared with inundated SMP rice. Water productivity with AWD-SRI management practices was almost doubled (0.68 g/l) compared to CF-SMP (0.36 g/l). Significant improvements were observed in the morphology of SRI plants in terms of root growth, plant/culm height, tiller number per hill, tiller perimeter, leaf size and number, leaf area index (LAI), specific leaf weight (SLW), and open canopy structure. These phenotypic improvements of the AWD-SRI crop were accompanied by physiological changes: greater xylem exudation rate, crop growth rate, mean leaf elongation rate (LER), and higher light interception by the canopy compared to rice plants grown under CF-SMP. SRI plants showed delayed leaf senescence andgreater light utilization, and they maintained higher photosynthetic rates during reproductive and grain-filling stages. This was responsible for improvement in yield contributing characteristics and higher grain yield than from flooded rice with SMP. We conclude that SRI practices with AWD improve rice plants’ morphology, and this benefits physiological processes that result in higher grain yield and water productivity.
Not Available
 
Date 2018-07-26T06:52:26Z
2018-07-26T06:52:26Z
2010-11-17
 
Type Research Paper
 
Identifier 68
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/6302
 
Language English
 
Relation Not Available;
 
Publisher Springer