Effect of balanced nutrition on nitrogen-use efficiency, N balance and productivity of maize (Zea mays) in Inceptisol and Alfisol of Tamil Nadu

摘要

A field experiment was conducted during July-October of 2006 and 2007 at Department of Soil Science and Agricultural Chemistry, Coimbatore, to study the effect of balanced fertilization on yield of hybrid maize (Zea mays L.), nitrogen-use efficiency and N balance in Mayamankuruchi and Madukkur soil series (Inceptisol and Alfisol) of Tamil Nadu. The experiments was conducted in randomized block design with 13 treatments comprising different levels of N, P and K with Zn as inorganic fertilizers. The treatments were replicated thrice. The range of partial factor productivity (PFP) was from 18.9-45.0 kg grain/kg nitrogen applied to hybrid maize in Mayamankuruchi soil series and 18.7-44.3 kg/kg (N) in Madukkur soil series. The agronomic efficiency variedfrom 4.9-24.2 and 5.2-24.3 kg grains/kg N in Mayamankuruchi and Madukkur soil series respectively The highest values (86.3 and 94.9 kg/kg (N) of physiological efficiency were registered in the treatments omitting Zn in both series soil. The fraction ofapplied N that is absorbed by a crop is expressed as apparent N recovery The mean recovery efficiency for applied N ranged from 29.5-85.6% and 28.6-81.3% for the two soils. The net positive nitrogen balance was found in Mayamankuruchi soil series and thenegative nitrogen balance in Madukkur soil series.