Studies on nutrient management practices through organics in sesame (Sesamum indicum L.)
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Date
2008
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UAS, Dharwad
Abstract
A field experiment to study the nutrient management practices through organics in
sesame was conducted at the ARS, Hanumanamatti (Ranebennur), University of Agricultural
Sciences, Dharwad on Alfisols during kharif 2007. The experiment comprised of five main
plot treatments mainly, Beejamrut + Jeevamrut + mulching, with organic pest management
(NM1), FYM (1/3) + Vermicompost (1/3) + Green manuring (1/3) equivalent to RDN
+organic pest management (NM2), FYM (1/3) +Vermicompost (1/3) + Green manuring (1/3)
equivalent to RDN + FYM + organic pest management (NM3), RDF + FYM + Azospirillum +
Trichoderma with IPM (NM4), RDF alone with chemical plant protection (NM5), and three
sub plot treatments mainly, one spray of panchagavya at 30 DAS (PS2), two sprays of
panchagavya at 30 DAS and flowering stage (PS3), and a control. The treatments were
replicated thrice and experiment laid out in a split plot design.
Integrated nutrient management (NM4) recorded significantly higher sesame yield
(296.52 kg/ha) over rest of the manurial treatments. Among liquid manures, treatment PS3
recorded significantly higher sesame yield (239 kg/ha) over control (231.61 kg/ha). The
values for growth and other yield parameters were also significantly higher in these
treatments. Among manurial treatments, NM3 recorded significantly higher microbial
population and available N, P2O5 and K2O content in the soil. Among liquid manures, PS3
recorded higher microbial population and available N, P2O5 and K2O content in the soil.
Economic analysis clearly indicated that net returns in sesame were significantly higher
(Rs.4860/ha) with NM5 over rest of the treatments, whereas B: C ratio was significantly
higher with NM1 over rest of the treatments.
As this is the first year trial, organics alone could not achieve the higher yield of
sesame although it has beneficial effects on soil fertility and microbial activity. Hence, the
integrated nutrient supply system provided an ideal nutrition for crop and produced higher
yield in sesame.
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Agronomy