摘要 : Experiments were conducted for 6 years (from 2003-04 to 2008-09) at Raipur to evaluate the production potential, economic viability and competence of 7 rice (<i>Oryza sativa</i> L.) based cropping systems under Chhattisgarh plains... 展开 Experiments were conducted for 6 years (from 2003-04 to 2008-09) at Raipur to evaluate the production potential, economic viability and competence of 7 rice (<i>Oryza sativa</i> L.) based cropping systems under Chhattisgarh plains agro-climatic conditions. The cropping systems were rice-wheat [<i>Triticum aestivum</i> (L.) emend Fiori and Paol]-fallow; rice-mustard [<i>Brassica juncea</i> (L.) Czern and Coss]-green manure (GM); rice-coriander (<i>Coriandrum sativum</i> L.)-green gram [<i>Vigna radiata</i> (L.) Wilczek]; rice-table pea (<i>Pisum sativum</i> L.)-maize (<i>Zea mays</i> L.) (fodder); rice-brinjal (<i>Solanum melongena</i> L.)-green manure; rice-onion (<i>Allium cepa</i> L.)-green manure and rice-potato (<i>Solanum tuberosum</i> L.)-cowpea [<i>Vigna unguiculata</i> (L.) Walp]. Sunhemp (<i>Crotolaria juncea</i>) was grown as green manure. The highest total productivity was obtained under rice-potato-cowpea system (22.29 t/ha) while rice-brinjal-GM gave the highest net return (Rupee 98,252/ha) and benefit:cost ratio (2.40). However, the rice-potato-cowpea cropping sequence provided most employment (554 days). Least number of irrigations (12) with lowest quantity of water was required under rice-onion-GM, however, maximum irrigation water use efficiency was recorded under rice-brinjal-GM (235.46 kg/ha/cm water). Rice-wheat-fallow and rice-onion-GM recorded the highest sustainability index (0.84). Rice-potato-cowpea sequence was found to be most appropriate system in terms of profit as well as sustainability over the years. 收起