Performance of Different Sources of Organic Manures in Comparison with RDF and INM on Growth, Yield and Economics of Rice-Greengram Cropping System Alagappan S.*, Dr. Venkitaswamy R. Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore - 641 003, Tamil Nadu, India *Email: alga.s@rediffmail.com
Online published on 13 January, 2015. Abstract Field experiments were carried out at Tamil Nadu Agricultural University, Coimbatore, India during samba (August-December) season of 2012 and 2013 to study the effect of different sources of organic manures in comparison with RDF and INM on growth, yield and economics of rice with succeeding greengram during summer 2013 and 2014. The experiment consisted of fourteen treatments which were laid out in Randomized Block Design, replicated thrice and SRI method of planting was adopted during both the years. Among fourteen treatments, four treatments with different organic manures at 100 per cent RDN on equi nutrient basis (farm yard manure, vermi-compost, poultry manure and (Dhaincha) green manure), another six treatments consisted of 50 per cent combination of each manure, one treatment with 1/4th combination of all the manures and one absolute control (without organic or inorganic). These treatments were compared with the recommended dose of fertilizer (RDF) and integrated nutrient management practice (RDF + Dhaincha @ 6.25 t ha−1). The effect on plant height, panicle m−2, filled grain percentage, grain yield were recorded in both the years. Out of fourteen treatments, INM imposed treatment performed better followed by RDF. Among the organic treatments, 100% RDN through green manure followed by 25% RDN through each organic manures combination recorded higher plant height, panicle m−2, filled grain percentage and grain yield of rice. The succeeding residual greengram's yield attributes like number of clusters plant1, number of pods plant−1, number of seeds pod−1 and grain yield were recorded and which were compared with economics in the entire cropping system in both the years of experimentation. Top Keywords plant height, filled grain, grain yield, rice greengram cropping, economics. Top |