Productivity and economics of castor through integrated nutrient
management practices under irrigated condition
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Author:N.Senthil Kumar and S.Santha
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:95, Issue:jul-dec
DOI:
Abstract
Field experiments were carried out at Agricultural College and Research
institute, Madurai during summer (Feb-June) and rainy (Aug-Dec) seasons of
2004 to study the effect of integrated nutrient management practices on yield
components and oil quality of castor. Among the organic nutrients, application
of FYM @ 12.5 t ha-1 Azospirillum + Phosphobacteria recorded significantly
more number of spikes per plant, capsules per spike and seed yield as compared
to pressmud @ 2 t ha-1+ Azospirillum + Phosphobacteria and sugarcane biocompost
@ 1 t ha-1. Similarly the highest number of spikes per plant, capsules per
spike, and seed yield were recorded in application of 22.5:11.5:11.5 kg NPK
ha-1 + Zn SO4 @ 12.5 kg ha-1 as basal + ZnSO4 0.25% foliar spray twice
at 30 and 45 DAS as compared to other inorganic nutrients. The similar organic
and inorganic nutrient treatments proved to be more economical in view of
its higher net returns and benefit: cost ratio in both the seasons of summer
and rainy, respectively.
Key words : Castor, FYM, pressmud, sugarcane biocompost, NPK, ZnSO4.