Effect of integrated nitrogen management on growth and yield of wet seeded rice-rice-greengram cropping system

摘要

A field experiment was conducted during kharif, rabi and summer seasons of 2002-03 and 2003-04 at Tamil Nadu Agricultural University, Coimbatore, to study the effect of integrated nitrogen management on growth and yield of wet seeded rice-rice-greengram cropping system. The field experiments were laid out in a split plot design with three replications. Organic N sources viz., dual cropping of Azolla, Sesbania rostrata individually and in combination were compared in main plot treatments. Inorganic Nlevels viz., 0, 50, 75 and 100% recommended N were compared in the sub-plots. Greengram was raised as a summer residual crop. The experimental results revealed that the combination of S. rostrata intercropping and Azolla microphylla as dual cropping in rice alongwith 50% inorganic nitrogen application both for kharif and rabi seasons followed by summer residual greengram increased the growth and yield attributes and yield of wet seeded rice-rice-greengram system.