Evaluation of varieties and local manurial sources for organic rice (Oryza sativa) production

B.L. MANJUNATH; R.R. VERMA; R. RAMESH; N.P. SINGH

doi:10.59797/ija.v57i3.4641

Authors

B.L. MANJUNATH
R.R. VERMA
R. RAMESH
N.P. SINGH

DOI:

https://doi.org/10.59797/ija.v57i3.4641

Keywords:

Microbial population, Organic carbon, Organic sources, Problematic weed, Rice

Abstract

Field experiments conducted at ICAR Research Complex for Goa, for two years during 2009 to 2011 to stan- dardize locally available nutrient sources for different rice ( Oryza sativa L.) varieties indicated that high yielding rice 'Karjat-3' and red kernelled rice 'Revathy' recorded significantly more productive tillers (8.99 and 8.94/hill, re- spectively) and panicles per unit area (276 and 262 per m2, respectively) over scented rice 'Pusa Sugandh-5'. Rice variety 'Karjat-3' recorded significantly higher grain yield (3.13 t/ha) over 'Revathy' (2.50 t/ha) and 'Pusa Sugandh- 5' (1.80 t/ha). Application of recommended fertilizers recorded significantly higher productive tillers (9.3/hill), total dry matter (26.1 g/hill), panicles per unit area (268/m2) and higher grain yield of rice during first year of experimen- tation and the pooled mean (3.15 t/ha and 3.09 t/ha, respectively). Use of Glyricidia + Eupatorium each at 5 t/ha yielded 87% of the yield (2.69 t/ha) recorded with recommended fertilizers indicating its feasibility for use as nutri- ent source for rice production. Higher increase in organic carbon was observed with FYM @ 10 t/ha (1.44% O.C.) and paddy straw + water hyacinth each at 5 t/ha (1.36% O.C.). Application of Sesbania rostrata @10 t/ha resulted in higher microbial growth in soil in terms of fungi (10.39 103 CFU/g), bacteria (17.5105 CFU/g) and actino- mycetes (10.28 104 CFU/g) and yield of rice.

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