PERFORMANCE OF RICE GENOTYPES UNDER DIFFERENT METHODS OF CULTIVATION AND COMBINATION OF ORGANIC SOURCES OF NUTRIENTS
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Date
2008-02
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Experiments on “Performance of rice genotypes under different methods of cultivation
and combination of organic sources of nutrients” were carried out during kharif 2001 and summer
2002 on farmer’s field at Rajavanthi village, Pavagada taluk, Tumkur District. Two field
experiments were conducted with direct seeding and transplanting methods. The results of direct
seeded rice revealed significantly higher grain yield and straw yield were recorded with KRH-2
during both the seasons (7.00 and 6.61 t ha-1; 10.08 and 9.21 t ha-1, respectively) as compared to
Hamsa (5.04 and 4.66 t ha-1; 7.88 and 7.21 t ha-1, respectively). Same trend was observed in
number of productive tillers m-2 (428 and 372, respectively), number of grains panicle-1 (140.1
and 129.3, respectively), 1000 grain weight (24.5 and 24.3g, respectively) and harvest index (0.40
and 0.41, respectively) as compared to Hamsa. Among different fertility management practices,
150 kg N supplied through green manure, FYM and poultry manure (Fm7) recorded significantly
higher grain yield during kharif season (6.94 t ha-1) but during summer season 100 kg N supplied
through green manure, FYM and poultry manure (Fm5) recorded significantly higher grain yield
(6.03 t ha-1). Significantly higher nutrient uptake was recorded with KRH-2 during both the
seasons (196.7 and 171.3 kg N ha-1; 33.7 and 30.8 kg P2O5 ha-1 and 171.7 and 145.4 kg K2O ha-1,
respectively) as compared to Hamsa. Net income and B:C ratio were significantly higher with
KRH-2 during both the seasons (Rs.20482 and Rs.18352, respectively; 1.43 and 1.26,
respectively). Among different fertility management practices, 100 kg N supplied through green
manure, FYM and poultry manure recorded significantly higher N, P2O5 and K2O uptake and also
resulted in significantly higher net returns and B:C ratio.
The results of the experiment-II (transplanted rice) revealed similar results in direct
seeding. Significantly higher grain yield was recorded with KRH-2 during both the seasons (7.32
and 6.75 t ha–1, respectively) as compared to Hamsa (5.30 and 4.62 t ha–1, respectively). Similar
trend was recorded in number of productive tillers hill-1 (10.02 and 9.16, respectively), number of
grains panicle-1 (147.8 and 133.1, respectively), straw yield (11.43 and 10.55 t ha–1, respectively)
and harvest index (0.39 and 0.39, respectively) as compared to Hamsa. Among different fertility
management practices, application of 150 kg N through green manure, FYM and poultry manure
(Fm7) produced significantly higher grain yield (7.26 t ha–1) during kharif season but in summer
season, 100 kg N supplied through green manure, FYM and poultry manure (Fm5) recorded
significantly higher grain yield (6.20 t ha–1). Genotype KRH-2 recorded significantly higher
nutrient uptake during both the seasons (219.5 and 202.6 kg N ha–1; 39.1 and 35.6 kg P2O5 ha-1;
187.8 and 175.1 kg K2O ha–1, respectively) as compared to Hamsa. Similar significant results
were observed with net income as well as B:C ratio. Among different fertility management
practices, 100 kg N supplied through green manure, FYM and poultry manure or groundnut cake
(Fm5 and Fm6) recorded significantly higher N, P2O5 and K2O uptake and also resulted in
significantly higher net returns and B:C ratio.
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