Comparative study on responses=
of early
maturing rice genotypes to system of rice intensification (SRI) and traditi=
onal
transplanting method of rice cultivation under irrigated environments
=
A.P.Singh=
, R.Verma and A.K.Sarawgi
Department of Agronomy and Plant Breeding,
Indira
Gandhi Agricultural University,
By
the middle of this century, there will be about one-third less arable land
available per capita, and probably an even greater reduction in the
availability of water for agricultural purposes. Hence productivity of land=
and
water will have to be more than doubled if food supply is to meet the deman=
ds.
The question of yield potential-how to keep moving up the maximum attainable
yield-has begun to trouble many scientists. Therefore, it is imperative to
adopt new approaches and identify approach-specific genotypes. Rice being t=
he
predominant crop of wet season in Chhattisgarh =
state,
there is an urgent need to raise its current productivity especially in
irrigated environments initially.
Of
late, the system of rice intensification (SRI) is gaining popularity among =
rice
farmers in several states of the country for its potential to save water and
increase yields. Keeping this in view, a study is being carried out at IGAU
farm, Raipur to identify the suitable genotypes=
of
rice specifically for SRI and traditional method of rice cultivation and
explore the genetic yield potential of 18 early maturing (95-105 days) rice
cultivars during the wet season of 2006.
The observations so far recorded on
number of productive tillers per hill and length of panicle suggested that
values were marginally better for all the genotypes under SRI as compare wi=
th
those under traditional method of cultivation. The culture R 1099-2596-1-1 record=
ed
34.5% higher number of productive tillers, while R 1102-2795-3-1 recorded 50.=
8%
greater length of panicle under SRI.
The increase in above two important yield-attributing characters
indicated similar increase in the yield of above genotypes to be of the same
magnitude.
***