Studies on integrated nutrient requirement of hybrid maize (Zea mays L.) under irrigated conditions

摘要

Field experiments were conducted during 2001 and 2002 at Tamil Nadu Agricultural University, Regional Research Station, Paiyur, to study the influence of integrated use of soil application of inorganic and organic nutrients and foliar feeding of majorand micro nutrients in COH 3 hybrid maize. The results revealed that growth (plant height, total dry matter production) and yield attributes (cob length, cob girth, cob weight and 100 grain weight), grain and stover yields were maximum when maize was applied with 100% recommended NPK (135:62.5:50 kg ha~(-1)) coupled with foliar feeding of 1% DAP, 1% MOP, 0.5% ZnSO_4, 0.2% B and 1% FeSo_4 twice on knee high stage and tasseling stage of the crop, which was followed by the treatment of 125% recommended NPK application (170:78:62.5 kg ha~(-1)). The net return and B:C ratio were also high in the above mentioned treatments. Uptake of nutrients showed similar trend as that of growth and yield. The available nutrient status was marginally improved with at 125% NPK and 100% NPK in addition with FYM 12.5 t ha~(-1).