Vol. 10, Issue 10 (2021)

Author(s):
Jothi M, Manivannan V, Mohamed Yassin M and Ganesan K

Abstract:
A field experiment was conducted to study the effect of organic manures and microbial nutrient spray on yield attributes and yield of organic rice, at the Northern Block Farm of Agricultural Research Station (ARS) Bhavanisagar, Tamil Nadu Agricultural University during summer 2021. The experimental field was laid out in Factorial Randomized Block Design and with treatments were replicated thrice. The experiment comprised of two factors, factor I consists of organic manures with 6 levels viz., farm yard manure (OM₁), enriched farm yard manure (OM₂), vermicompost (OM₃), composted poultry manure (OM₄), neem oil cake (OM₅) against absolute control (OM₆). Factor II consists of microbial nutrient spray with 3 levels viz., 3% panchagavya (MNS₁), 1% pink pigmented facultative methylotrophs (MNS₂) against water spray (MNS₃). From the results, higher grain yield (5236 kg/ha) and straw yield (8640 kg/ha) was recorded with application of vermicompost @ 2.08 t/ha (OM₃) followed by the application of neem oil cake @1.2 t/ha (OM₅) and composted poultry manure @ 3.47 t/ha (OM₄). Significantly, lower grain yield (2814 kg/ha) and straw yield (5105 kg/ha) was noted in absolute control (OM₆). The microbial nutrient spray of 3% panchagavya recorded maximum grain yield (5008 kg/ha) and straw yield (8016 kg/ha). Among nutrient sources used, vermicompost recorded maximum grain yield by increased number of productive tillers per hill and higher amount of filled grains per hill to all other nutrient source.