Vol. 4 No. 1
Effect of integrated management of organic manure and inorganic N fertilizer on rice (Oryza sativa) and its residual effect on utera linseed (Linum usitatissimum) and soil fertility.
Author(s): S. JANA, D. DUTTA, D. MAITY AND P. BANDYOPADHYAY
Abstract: A field experiment was carried out during rainy (kharif) and Winter (rabi) seasons of2004-2005 and 2005-2006 at the Regional Research Substation, Sekhampur, West Bengal, to study the effect of integrated management of organic manure and inorganic N fertilizer on rice (Oryza saliva L.) and its residual effect on utera crop linseed (Unum usitatissimum L.) and fertility build up of soil. The yield, yield attributes, N content and N uptake of rice (cv. IR-36) were significantly higher under 75% recommended dose of nitrogen (RON) along withJ tonnes poultry manure than all other treatments on pooled data basis, but remained on a par with 75% RON + 4 tonnes Sesbania green-leaf manure and 75 % RDN + 5 tonnes FYM. The per cent increase in grain yield with 75% RDN + 2 tonnes poultry manure, 75% RDN + 4 tonnes green manure and 75% RON + 5 tonnes FYM/ha over I 00% RDN ( 60 kg/ha) alone were 27. 7, 25 and 22.8% respectively. The nitrogen use-efficiency parameters revealed that agronomic efficiency and recovery efficiency were highest with 75% RON+ 2 tonnes poultry manure, followed by 75% RON + 4 tonnes green manure and 75% RDN + 5 tonnes FYM. After harvest ofrice, the organic carbon status of soil was enhanced in all organic added treatments than initial level. Substantial build up P was noticed in FYM and Sesbania green-leaf applied plots. The available K was in declining trend under all the treatments except rice straw incorporated plots. The residual effect of different treatments (applied to kharif rice) on the succeeding utera linseed (cv. Neela) during rabi season was not significant.
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