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- Title
STUDIES ON RELATIVE EFFICACY OF ORGANICS AND THEIR INTEGRATION WITH FERTILIZER N ON RICE YIELD AND NUTRITION.
- Authors
Manivannan, R.; Sriramachandrasekharan, M. V.
- Abstract
Field experiments were conducted in two years in clay loam soil to study the influence of organic sources and mineral N on yield and nutrients uptake of rice tested on N equivalence. The treatments consisted of different organics viz., composted coir pith (CCP), green manures (GM), sugarcane trash compost (STC), vermicompost (VC), poultry manure (PM) and FYM applied at 100% RDN and combination of above organics @ 50% N and urea @50% N besides 100% RDN as urea and control. The results revealed that addition of organics or mineral N or both significantly improved rice yield and nutrients uptake over control. Among the organics alone, the grain yield ranged from 4271, 4752 kg ha-1 (CCP) to 4603, 5078 kg ha-1 (VC). Rice yield improved remarkably with organics and fertilizer N were applied as 50% + 50%. The grain yield ranged from 4674, 5070 kg ha-1 CCP (50%) + urea N (50%) to 4943, 5332 kg ha-1 VC (50% N) + urea N (50% N) and straw yield ranged from 6276, 6728 kg ha-1 (CCP) to 6782, 6746 kg ha-1 (VC). With respect to integrated treatments, the straw yield ranged from 6698, 6765 CCP (50% N) + 50% urea N) to 7314, 7725 VC (50%N)+ 50% urea N. Application of vermicompost (50%N) + urea (50% N) (T11) recorded highest nutrients uptake viz., nitrogen (98.4, 100.8 kg ha-1), phosphorus (24.5, 29.4 kg ha-1) and potassium (72.7, 80 kg ha-1) in Kharif 2007 and 2008 respectively. Among the organics alone, application of vermicompost (100% N) recorded highest nutrients uptake viz., nitrogen (68.2, 69.1 kg ha-1), phosphorus (13.92, 15.88 kg ha-1) and potassium (52, 55.7 kg ha-1) in both years. The lowest nutrients uptake was recorded in CCP (100% N) among organics alone and CCP (50% N) + mineral N (50% N) among integrated treatments in clay loam soil.
- Subjects
RICE yields; RICE field irrigation; ORGANIC fertilizers; VERMICOMPOSTING; CLAY loam soils
- Publication
Plant Archives (09725210), 2019, Vol 19, Issue 2, p3169
- ISSN
0972-5210
- Publication type
Article