Effect of organic sources of nitrogen on productivity, quality of rice (Oryza sativa) and soil fertility in single crop wetlands

Abstract

A field experiment was conducted during 1996-97 and 1997-98 to study the influence of organic manures, viz. dhaincha [Sesbannia cannabina (Retz.) Pers.], sunnhemp (Crotalaria juncea L.) and FYM, on productivity, quality and soil fertility. All the sources of organic manures improved the yield, quality and soil fertility. Among the various organic sources, in-situ incorporation of dhaincha @ 12 tonnes/ha remarkably increased the grain (18%) and straw (16%) yields of rice (Oryza sativa L.) over no organic manure, owing to increase in growth and yield-attributing characters of rice. An incorporation of dhaincha increased the optimum cooking time, total amylose content, crude protein content and reduced the gruel loss (%) of grain. Organic manures significantly improved the soil-fertility status and it was pronounced by the dhaincha incorporation by increasing organic carbon content, available soil N, P and K at post-harvest stage.