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MORPHO - PHYSIOLOGICAL CHARACTERS CONTRIBUTING FOR PHOSPHORUS USE EFFICIENCY IN RICE UNDER GRADED PHOSPHORUS LEVELS

KrishiKosh

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Title MORPHO - PHYSIOLOGICAL CHARACTERS CONTRIBUTING FOR PHOSPHORUS USE EFFICIENCY IN RICE UNDER GRADED PHOSPHORUS LEVELS
 
Creator VERONICA, N
 
Contributor PADMA, V
 
Subject vegetative propagation, rice, biological phenomena, inorganic acid salts, planting, concentrates, grain, harvesting, developmental stages, reproductive stage
MORPHO - PHYSIOLOGICAL, PHOSPHORUS, RICE, PHOSPHORUS
 
Description A pot culture experiment was conducted at Directorate of Rice Research, Hyderabad,
during kharif 2012 to study the “Morpho – physiological characters contributing for
phosphorus use efficiency in rice under graded phosphorus levels”. The experiment
comprised of five treatments of phosphorus levels viz. 0, 25%, 50%, 75% and 100%
recommended phosphorus dose and four rice genotypes viz. Akhanphou, MTU 1010, RP Bio
226 and Swarna.
Among the graded levels of phosphorus, phosphorus when applied at 100%
recommended dose resulted in significantly higher values for morphological parameters such as
plant height, stem thickness, tiller number hill-1, root and shoot biomass. It also had a positive
impact on the photosynthetic rate.
Application of 100% phosphorus also resulted in highest number of panicles per hill,
maximum panicle length, number of filled grains per panicle, total dry matter, 1000 grain weight
and grain yield. Spikelet sterility and number of unfilled grains per panicle were minimum in this
treatment.
The phosphorus content in the component parts of the plant such as leaf, stem, root and
grain also was positively influenced by the phosphorus levels.P content was high at maximum
vegetative stage and declined towards harvest indicating the remobilization of phosphorus to
grains at harvest.
Among the genotypes, Akhanphou and Swarna recorded the maximum grain yield even
under low P levels indicating a higherphosphorus use efficiency. In Akhanphou maximum grain
yield can be attributed to a higher photosynthetic rate, more number of panicles per hill and less
number of unfilled grains per panicle whereas in Swarna it can be due to a higher tiller number,
more number of green leaves per hill resulting in higher photosynthetic rate and more number of
filled grains per panicle.
This study has revealed that application of phosphorus had resulted in increase in grain
yield of rice genotypes. Akhanphou and Swarna responded more positively to phosphorus
application.
 
Date 2016-06-08T15:24:33Z
2016-06-08T15:24:33Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67031
 
Relation ;D9270
 
Format application/pdf
 
Publisher ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY