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Differential responses of system of rice intensification (SRI) and conventional flooded-rice management methods to applications of nitrogen fertilizer

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Title Differential responses of system of rice intensification (SRI) and conventional flooded-rice management methods to applications of nitrogen fertilizer
Not Available
 
Creator A.K. Thakur
Sreelata Rath
Krishna Gopal Mandal
 
Subject Cultivation practices
Grain yield
Nitrogen use efficiency
Oryza sativa
Root growth
System of rice intensification
 
Description Not Available
Background Rising food demand, slowing productivity growth, poor N-use efficiency in rice, and environmental
degradation necessitate the development of more productive, environmentally-sound crop and soil management practices. The system of rice intensification (SRI) has been proposed as a methodology to
address these trends. However, it is not known how its modified crop-soil-water management practices affect
efficiency of inorganic nitrogen applications. Methods Field experiments investigated the impacts of
SRI management practices with different N-application rates on grain yield, root growth and activity, uptake of
N and its use-efficiency, leaf chlorophyll content, leaf Nconcentration, and photosynthetic rate in comparison
with standard management practices for transplanted flooded rice (TFR). Results Overall, grain yield with SRI was 49 % higher than with TFR, with yield enhanced at every N application dose. N-uptake, use-efficiency, and partial factor productivity from applied N were significantly higher in SRI than TFR. Higher leaf nitrogen and
chlorophyll contents during the ripening-stage in SRI plants reflected delayed leaf-senescence, extension ofphotosynthetic processes, and improved root-shoot activities contributing to increased grain yield. Conclusions Rice grown under SRI management used N fertilizer more efficiently due to profuse root development and improved physiological performance resulting in enhanced grain yield compared to traditional
flooded rice.
Not Available
 
Date 2018-07-26T06:52:15Z
2018-07-26T06:52:15Z
2013-02-05
 
Type Research Paper
 
Identifier 13
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/6301
 
Language English
 
Relation Not Available;
 
Publisher Springer Science+Business Media Dordrecht